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20 May 2022, Volume 28 Issue 3 Previous Issue    Next Issue
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Special Thesis & Basic Research

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Effects of Oxygen-increasing Pattern in Paddy Fields on Rice Root Morph-physiological Traits XU Ran, HU Qian, CHU Guang, CHEN Song, XU Chunmei, LIU Yuanhui, MO Honghua, Zhang Xiufu, Wang Danying 2022, 28(3): 1-5.  DOI: 10.3969/j.issn.1006-8082.2022.03.001 Abstract ( )   HTML ( )   PDF (657KB) ( )   Using Yongyou 1540 and Chunyou 927 as test materials, we carried out a field trial in 2020, to explore the effects of oxygen-increasing pattern in paddy fields on rice root morph-physiological traits. The results showed that compared with CF treatment （continuous flooding）, OP treatment（topdressing calcium peroxide） significantly increased grain yield by 7.6%~8.7%; meanwhile, it improved rice root morphological and physiological traits, such as increased rice dry weight, root length density, root total absorbing surface area and active absorbing surface area at heading time and mid-grain filling period, and increased root oxidation activity, root bleeding rate and content of cytokinins （zeatin + zeatin riboside） in root bleeding during grain filling period. Meanwhile, OP significantly increased photosynthetic rate of the flag leaf and activities of sucrose synthase and adenosine diphosphate-glucose pyrophosphorylase in grains during grain filling period. The above results indicate that increasing oxygen in paddy fields can improve morphological and physiological traits of rice root, promote root-shoot growth, and increase grain yield.

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Research Progress of Dongxiang Wild Rice and Utilization Strategy in Rice Breeding MAO Yijian, LI Sanfeng, WU Rongliang, WANG Yuexing, LI Chunsheng 2022, 28(3): 6-10.  DOI: 10.3969/j.issn.1006-8082.2022.03.002 Abstract ( )   HTML ( )   PDF (483KB) ( )   Dongxiang wild rice is the most northward （N 28°14′, E 116°36′） wild rice germplasm resources found in the world, and its genome contains disease resistance, insect resistance, stress tolerance and many other excellent genes / QTL, and a lot of previous studies have been carried out on it. In this paper, the research progress of Dongxiang wild rice was summarized from the aspects of disease resistance, pest resistance, stress resistance, fertility, yield and other excellent characteristics, and the strategies of breeding and utilization of Dongxiang wild rice were put forward.

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Molecular Bases of Rice Quality Regulation and Effects of Abiotic Stress on Rice Quality NIU Shulin, TANG Miaomiao, DU Chenyang, WANG Zenglan, XIE Xianzhi, ZHENG Chongke 2022, 28(3): 10-19.  DOI: 10.3969/j.issn.1006-8082.2022.03.003 Abstract ( )   HTML ( )   PDF (1137KB) ( )   Rice is one of the most important food crops in the world, providing food for more than half of the world's population. In recent years, as the problem of food and clothing has been solved, the quality of rice has received increasing attention. With the development of modern biotechnology and bioinformatics technology, genes that control rice quality have been cloned and applied to rice breeding, making rice, an ancient crop, last forever. This article reviews the molecular mechanisms regulating rice quality, and summarizes the effects of drought, low temperature, high temperature, and salt stress on rice quality, hoping to provide references for improving rice quality under abiotic stress.

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Effects of Straw Fast-rot Agent on Rice Yield and Soil Physical and Chemical Properties HAN Lijun, XIE Hao, XUE Zhangyi, YAN Guanyutong, GU Junfei 2022, 28(3): 20-25.  DOI: 10.3969/j.issn.1006-8082.2022.03.004 Abstract ( )   HTML ( )   PDF (870KB) ( )   An experiment was set up to study the effects of five different dosages of straw fast-rot agent treatments （0, 0.1, 0.2, 0.3 and 0.4 g/pot） on rice yield, straw decomposition and soil physicochemical properties under the condition of straw returning field. The results showed that the amount of straw decomposed increased with the increase of the amount of fast-rot agent, and the straw decomposition rate was the largest in the treatment of 0.4 g/pot, which was 13.0%-18.0% higher than that of the treatment without fast-rot agent. Compared with the treatment without fast-rot agent, the yield of the treatment with fast-rot agent was significantly increased by 1.3%-11.1%, and the treatment with 0.2 g/pot performed the best. The yield increased due to higher grains number per panicle and seed setting rate. The application of fast-rot agent could promote the accumulation of dry matter in rice, and the nitrogen accumulation of rice plants at the mature stage increased significantly compared with the treatment without fast-rot agent, and the highest increase was in the treatment of 0.2 g/pot. The application of fast-rot agent could help rice absorb and utilize soil organic matter, total nitrogen content and available nutrients, and improved the level of soil fertilizer supply. The results of this study have reference significance for the efficient utilization of straw resources.

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Correlation Analysis and Health Risk Assessment of Heavy Metal Content in Paddy Soils and Rice Grains under Flood and Drought Rotation System SHANGGUAN Yuxian, HEI Erping, ZENG Xiangzhong, CHEN Kun, QIN Yusheng, HE Mingjiang, ZHOU Zijun 2022, 28(3): 26-34.  DOI: 10.3969/j.issn.1006-8082.2022.03.005 Abstract ( )   HTML ( )   PDF (1010KB) ( )   The heavy metal content in soil and rice of the paddy field in the Chengdu plain area were measured with the single pollution index method and the Nemerow comprehensive index method to analyze and evaluate the soil pollution degree of the paddy field, and use the health risk assessment model to evaluate the carcinogenic and non-carcinogenic health risks of adults and children in the study area. The results showed that the average contents of Cd, Pb, Cr and Hg in soil were greater than those in the soil background value in this area. Eighty-five percent of the sampling points of Cd single factor pollution index reached the warning limit, with the maximum value of 1.57. Nemero’s comprehensive pollution index （PN） was 0.60, without pollution, and the pollution index size of the five heavy metal elements was in the order of Cd>Pb>Hg>Cr>As. Cd content in soil was significantly and positively correlated with total nitrogen, organic matter and available potassium contents; Pb content in soil was significantly and positively correlated with alkali hydrolyzable nitrogen content and significantly and negatively correlated with available phosphorus content and pH value; there was a significantly positive correlation between Hg, Pb and As in soil, with homologous relationship and compound pollution. The contents of heavy metals in rice were lower than the limit standard, and no samples exceeded the standard; Cd and Cr contents in rice were significantly and negatively correlated with Cr content in soil, but Cd content in rice was significantly and positively correlated with Hg and As contents in soil. The total non carcinogenic risk index of six heavy metals to adults and children were 8.36 and 19.63 respectively. The carcinogenic risk index of three carcinogenic heavy metals to adults and children was in the order of Cd > As > Cr, and the total carcinogenic health risk to adults and children were 0.0076 and 0.0178 respectively. The results showed that there was a certain correlation between heavy metals in paddy soil and rice in the experimental area, and the combined pollution of heavy metals has caused a certain degree of health risk to local residents, especially children, and the way of crop intake was the most significant. As, Cr and Hg were the main elements that constitute non-carcinogenic health risks in this region, while As, Cr and Cd were the main elements that constitute carcinogenic health risks in this region.

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Fresh Rice Noodle Quality and Influencing Factors XIAO Zhengwu, HUANG Min 2022, 28(3): 34-41.  DOI: 10.3969/j.issn.1006-8082.2022.03.006 Abstract ( )   HTML ( )   PDF (869KB) ( )   Rice noodles are rich in type, smooth in taste and flexible in texture. They can be used as a staple food or as a breakfast, and are popular among consumers in China. Therefore, the scientific evaluation of rice noodle quality and the exploration of rice noodle quality influencing factors have always been closely concerned by researchers and companies. This article reviews the classification and evaluation methods of fresh rice noodles, and discusses the factors affecting the quality of rice noodles from five aspects: rice quality, soaking treatment methods, grinding methods, auxiliary materials and food additives, storage and preservation methods. At present, fresh rice noodles are divided into cut rice noodles and extruded rice noodles according to the molding process. Rice noodles made from varieties with high amylose content have low strip breaking rate and cooking loss rate and good sensory quality. Therefore, the amylose content can be used as the core index to screen out suitable rice varieties for rice noodles. Under the condition that the appropriate rice-water ratio is adjusted, the semi-dry grinding is safe and environmentally friendly, and has less damage to the starch. The quality of the produced rice noodles is not significantly different from that of the wet grinding. Additives such as salt or monoglyceride are used in combination with the preservation method, and the fresh rice noodles have a better preservation effect.

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Effects of Long-term Position Nitrogen Fertilizer Reduction on Rice Yield and Nitrogen Absorption and Utilizationn GONG Liang, JIN Dandan, NIU Shiwei, WANG Na, XU Jiayi, SUI Shijiang 2022, 28(3): 42-46.  DOI: 10.3969/j.issn.1006-8082.2022.03.007 Abstract ( )   HTML ( )   PDF (628KB) ( )   Under the background of agriculture eco-friendly development, the fertilizer application decreased constantly in China, which made the goal of “zero growth of the fertilizer rates by 2020” achieved in advance. However, it needs further study whether the long-term reduction of fertilizers application would have an impact on rice yield. Based on an 8-year experiment in the paddy fields, we conducted the effects of long-term position nitrogen （N） fertilizer reduction on the yield and N utilization of rice among the different amounts of N applied （N0, N160, N210, N260 and N315, representing 0, 160, 210, 260, 310 kg/hm2 N respectively）. The results showed that compared with the N260 treatment, the yield of the N160 treatment decreased year by year, and the difference reached a significant level（p<0.05）. The yield of N210 treatment decreased by 0.69%~1.34%, while The yield of N315 treatment increased by 0.23%~0.26% in some years and decreased by 0.05%-1.92% in the other, and the differences did not reach a significant level. The overuse or underuse of N fertilizer would tend to cause the reduction of rice yield. Relation analgsis showed when the N rate was 237.39 kg/hm2, the grain N uptake reached peak level. When the N rate was lower than 232.64 kg/hm2, the N harvest index remained at 70.31%. When the N rate was 230.73 kg/hm2, the N recovery efficiency was the highest at 38.89%. When the N rate was 227.63 kg/hm2, the N agronomic efficiency reached peak at 15.56 kg/kg. N partial factor productivity and N use efficiency increased with the reduction of N application rates. Soil N supply accounted for more than 53.36% of the rice N uptake. When the N rate was lower than 225.95 kg/hm2, there was a risk of depletion of soil N pool. Considering the yield and the average fertilizer use efficiency over the years, we recommended that the N application rate in the test area would be 225.95-232.64 kg/hm2, which could achieve the long-term stable yield.

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Comparative Analysis of Bacterial Community Structure in Paddy Soil Under Different Complex Cultivation Models SONG Yu, CONG Peidong, QU Guiwei, YANG Qinghai 2022, 28(3): 47-51.  DOI: 10.3969/j.issn.1006-8082.2022.03.008 Abstract ( )   HTML ( )   PDF (562KB) ( )   The structure, diversity and abundance of bacterial community in soil of crab paddy field, African goose paddy field and lobster paddy field at heading stage were compared and analyzed by sequencing the V3-V4 region of 16srRNA gene in Illumina system with high-throughput sequencing technology. A total of 3 101 OUTs were detected in each sample, which could be divided into 48 phyla, 115 classes, 223 orders, 39 families, 71 genera and 1 335 species. The three complex cultivation models had similar dominant microflora, but each had its own unique genus. Venn diagram analysis showed that the number of species in lobster paddy field was the largest, and the number of unique species in African goose paddy field was the largest. The results of hierarchical cluster analysis showed that the bacterial community structure of crab paddy field and lobster rice field was similar, but different from that of African goose rice field. The Shannon value, ACE value and Chao value of diversity index, richness index of crab paddy field were higher than those of lobster paddy field and African goose paddy field, which indicated that crab paddy field had better soil bacterial ecological composition.

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Relationship Between Yield and Quality of New Rice Lines and the Characteristics of High Taste Value Lines in Liaoning SUN Lili, JIA Haoyang, LI Kunyi, ZHANG Xiaopeng, CHEN Yanshuang, SUN Jialin, ZHANG Jing, XU Hai, CHENG Xiaoyi 2022, 28(3): 52-57.  DOI: 10.3969/j.issn.1006-8082.2022.03.009 Abstract ( )   HTML ( )   PDF (585KB) ( )   Using 89 new rice lines participating in the joint variety comparison test in Liaoning Province as test materials, comparing the differences in yield structure, panicle traits and rice quality traits among different lines, analyzing the correlations between traits, and clarifying the typical characteristics of high taste value lines. The results showed that the yield of the new lines was 612.24 kg/ 667 m2, and there were 10 and 17 new lines that met the national good quality standard of grade 2 and grade 3, respectively. The longer the panicle, the longer the grain shape, the less chalkiness, and the lower the brown rice rate and milled rice rate. The higher the seed setting rate of primary branch, the higher the head rice rate and milled rice rate. The longer the grain shape, the higher the seed setting rate of secondary branch. The higher the number of primary branches, the more grains per panicle, the denser the grains per panicle, and the grain distribution in the lower part of the rachis, the higher the protein content. The higher the yield, the better the appearance, hardness and taste of rice. The higher the protein content, the worse the appearance, the higher the hardness, the lower the viscosity, the worse the balance, and the lower the taste value. The higher the amylose content, the higher the hot paste viscosity and final viscosity, the longer the peak time, the lower the pasting temperature and the lower the breakdown value. The lower the setback value, the better the appearance of rice, and the higher the taste value. The typical characteristics of high taste value lines were longer grain size, lower protein content and lower setback value. When the setback value was about 1 005.5 cP, the taste was the best. The results could provide a theoretical basis for breeding new rice varieties with high quality, high yield and high efficiency.

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Application of Kitchen Waste as Compost in Rice Production and Its Effects on Paddy Soil LIU Xinyu, TIAN Peicong, LU Jiang, QIAN Jiayu, FANG Zhao, CAO Pan, TIAN Guangming 2022, 28(3): 58-62.  DOI: 10.3969/j.issn.1006-8082.2022.03.010 Abstract ( )   HTML ( )   PDF (452KB) ( )   In order to explore the suitability of kitchen waste compost in rice production, three treatments of kitchen compost （15.00 t/hm2, 30.00 t/hm2 and 45.00 t/hm2） were set based on a field plot experiment. The rice yield, grain quality, soil safety and economic benefit were measured and evaluated with local iso-nitrogen fertilizer （0.38 t/hm2） and chicken manure compost （13.49 t/hm2） as the control. The results showed that the kitchen compost treatment had higher rice yield than chemical fertilizer treatment and improved grain quality effectively. The kitchen compost treatment significantly increased the contents of organic matter and available potassium in the soil, and the content of heavy metals in the soil was far below the upper limit specified by the national standard, which belongs to the safe range. The treatment of 15.00 t/hm2 of kitchen compost could bring positive economic benefits to rice production. The experimental results can provide technical and theoretical support for kitchen waste compost.

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Effects of Sheldrake on Weed Control and Rice Yield and Quality in Rice-turtle Co-cropping Field WANG Xian, HU Zhongze, YI Zhengwei, ZHANG Zichang, SUN Fei, YANG Daliu 2022, 28(3): 62-65.  DOI: 10.3969/j.issn.1006-8082.2022.03.011 Abstract ( )   HTML ( )   PDF (431KB) ( )   By stocking different numbers of sheldrakes （0, 75, 150, 225, 300, 375 /hm2） in the rice and turtle co-cropping field, we compared and analyzed the effects of different numbers of sheldrakes on the occurrence of weeds, yield and quality of rice. The results showed that with the increase of the stocking numbers of sheldrakes, the number of weeds and the total dry matter in each growth period of the rice-turtle co-cropping field gradually decreased, and the treatment with a stocking number of 375 /hm2 had the best weed control effects. The yield of rice increased first and then decreased with the increase in the number of sheldrakes sacked, the treatment with the number of stocking was 225 /hm2 was the highest. At the same time, this treatment also improved the eating quality of rice. Based on the performance of weed control, rice yield and rice quality, the number of sheldrake stocked in the rice-turtle co-cropping field should be 225 /hm2.

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Effects of Exogenous 2,4-Epibrassinolide on Yield and Grain Quality of Zhehexiang 2 under High Temperature during Grain Filling Stage CHEN Yanhua, WANG Junke, WANG Yaliang, CHEN Huizhe, XIANG Jing, ZHANG Yikai, WANG Zhigang, ZHANG Yuping 2022, 28(3): 66-69.  DOI: 10.3969/j.issn.1006-8082.2022.03.012 Abstract ( )   HTML ( )   PDF (481KB) ( )   The purpose of this study was to explore the effects of spraying 2,4-epibrassinolide （EBR） at high temperature during rice grain filling stage on yield components and quality of rice, the high-quality rice variety Zhehexiang 2 was used as the test material. At the beginning of grain filling stage, high temperature （HT） and normal treatment （NT） were carried out for 15 days in automatic temperature- and humidity-controlled climate chambers. Plants were sprayed with 0.15 mg·L-1 2,4-epibrassinolide （EBR）, or the BR biosynthesis inhibitor brassinazole （BRZ）, or the same volume of distilled water （H2O, control） at the beginning of the temperature treatments. The results showed that the high temperature treatment during the grain filling stage significantly reduced the spikelet fertility rate of Zhehexiang 2, but had a small effect on the grain weight. Meanwhile, high temperature treatment reduced the processing quality, grain appearance quality and eating quality of rice. Exogenous spraying of EBR under high temperature could increased the yield of Zhehexiang 2, and increased the brown rice recovery, milled rice recovery, and head rice recovery of rice, but the EBR treatment decreased significantly the chalky grain rate, chalkiness and protein content. The results provides a theoretical basis for further clarifying the effects of EBR on alleviating high temperature damage in rice.

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Temporal and Spatial Evolution Characteristics of Late Spring Cold in Jinqu Basin and Its Impact on Double-cropping Early Rice WANG Chen, CHEN Jiangfeng, MAO Chengyan, PAN Xin 2022, 28(3): 70-74.  DOI: 10.3969/j.issn.1006-8082.2022.03.013 Abstract ( )   HTML ( )   PDF (753KB) ( )   According to the national standard（GB/T 34816-2017） for the meteorological indicators of late spring cold, using the historical temperature data of major cities in the Jinqu basin, sort out the cases of late spring cold from 1981 to 2020 and calculate the K value of the meteorological index for each late spring cold. The statistical analysis method and wavelet analysis method were used to analyze the frequency and intensity change characteristics of late spring cold in the Jinqu basin and the atmospheric circulation background. The results showed that the late spring cold in the Jinqu basin occurred frequently in the past 40 years, but the mild late spring cold accounted for a large proportion, and the severe late spring cold only accounted for 3.4%. The index K of late spring cold showed a significant wave dynamic trend, and the K value fluctuated around 3. There were obvious interannual and interdecadal cycle changes of late spring cold number and meteorological index K of 3 a, 7 a, 19 a and 4 a, 8 a, and 20 a in Quzhou. The strong late spring cold was affected by the strong cold air moving eastward and southwards in the Baikal region. The cold advection after the trough continues to infiltrate the south of the Jiangnan region, resulting in an abnormal temperature drop in the Jinqu basin and a severe late spring cold weather disaster.

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On the Behavior of Farmer Using Rice Seeds in the Area of the Middle and Lower Reaches of the Yangtze River GUAN Yaqi, SHEN Hongfang 2022, 28(3): 75-79.  DOI: 10.3969/j.issn.1006-8082.2022.03.014 Abstract ( )   HTML ( )   PDF (598KB) ( )   The paper used statistical analysis methods to study the factors that affect the behavior of farmer using rice seeds in the area of the middle and lower reaches of the Yangtze River based on the micro data of 342 farmers’ rice planting in Zhejiang, Jiangxi, Anhui, and Hunan provinces. The results showed that the behavior of farmers in using rice seeds is affected by factors such as the scale of rice planting, the age of the farmers, the year the farmers have been engaged in rice planting, the difficulty of obtaining agriculture information, and whether the farmers have agricultural insurance or not. The author puts forward corresponding countermeasures and suggestions: guiding the cultivation of widely-adapted rice varieties, and increasing the depth and breadth of agricultural technology extension through breeding policies, encouraging farmers to operate on an appropriate scale, cultivating new agricultural business entities such as family farms, and expand agricultural insurance to enhance the risk-resistant ability of rice farmers through the guidance of subsidy policies.

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Effects of Planting Rice on Soil Physical and Chemical Properties of Saline-alkali Land in Northern Shaanxi and Screening of Saline-alkali-tolerant Rice Varieties MA Zenghui, CAO Yuan, WANG Qilong 2022, 28(3): 80-84.  DOI: 10.3969/j.issn.1006-8082.2022.03.015 Abstract ( )   HTML ( )   PDF (496KB) ( )   In order to clarify the effects of rice planting on soil physical and chemical properties of saline-alkali land in Northern Shaanxi, screen salt tolerant rice varieties suitable for planting in Northern Shaanxi, and further explore the improvement and utilization mode of saline-alkali land in Northern Shaanxi, taking the land development project of Yingpanliang village, Duziliang Town, Dingbian County, Shaanxi Province as an example, we carried out a field experiment. The results showed that planting rice could significantly improve the physical and chemical properties of the saline alkali surface layer （0~20 cm） soil. The pH value and salt content of surface layer soil after planting rice reduced by 5.7% and 25.5% respectively, the total nitrogen, available phosphorus, available potassium and organic matter increased by 117.3%, 45.9%, 27.7% and 67.3%, respectively compared with those before regulation. In addition, different rice varieties had little difference on soil pH and salinity, but had a certain difference on nutrient content of surface layer soil in saline-alkali land. After rice harvest, the content of total nitrogen and available phosphorus in soil of planting Dongdao 4 was the highest, and the content of organic matter in soil of plant Ninggeng 28 was the highest. Longyou 619 had the highest yield among the three tested varieties, which were 5.0% and 42.8% higher than Ninggeng 28 and Dongdao 4, respectively.

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Investigation on the Current Situation of Organic Rice Production in Jiangsu Province DU Haimeng, WANG Haoyu, JING Peipei, GAO Pinglei, YANG Hongjian, DAI Qigen 2022, 28(3): 84-87.  DOI: 10.3969/j.issn.1006-8082.2022.03.016 Abstract ( )   HTML ( )   PDF (531KB) ( )   Jiangsu is a major province of rice production and consumption. The promotion of green, organic and healthy rice cultivation and the acceleration of the development of high-end and high-quality rice have become a topic of concern to governments and society. In this study, a survey on the current situation of organic rice production in Jiangsu Province was conducted which included the planting pattern, fertilizer application, and disease, pest and weed control, to find out the prominent problems and technical needs in organic rice planting, and put forward production suggestions of organic rice in Jiangsu Province. Our study is expected to have a certain enlightenment and promotion on the production of organic rice in Jiangsu Province, and provide a reference basis for accelerating the development of organic rice industry in Jiangsu Province.

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Current Situation and Development Strategies of Good-quality Japonica Rice in Shanghai DONG Yanxiao, Zhou Jihua, Cao Liming, Sun Bin 2022, 28(3): 88-91.  DOI: 10.3969/j.issn.1006-8082.2022.03.017 Abstract ( )   HTML ( )   PDF (573KB) ( )   The current situation and development status of rice industry in Shanghai was summarized, the existing problems in the development of rice industry were analyzed, and the corresponding countermeasures were put forward. The specific countermeasures are as follows: further optimizing the layout of crop stubble and promoting the combined use and cultivation of paddy farming system; improving the key technology of high-quality rice variety innovation and key techniques for green production; promoting the application of modern agricultural machinery agronomy and improving the productivity level of green rice by smart agriculture; implementing the brand strategy of local rice to improve quality and efficiency of rice industy.

Varieties & Technology

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Effects of Slow-release Fertilizer Application on the Growth Characteristics and Yield of Rice under Different Cultivation Methods ZHOU Jieyu, HE Jun, LI Dubai, ZHAO Shujun, ZHONG Yun, YANG Peng, ZHANG Yuhang, ZHONG Shengjian, ZHAO Fan, MA Yu, REN Zhiwen 2022, 28(3): 92-95.  DOI: 10.3969/j.issn.1006-8082.2022.03.018 Abstract ( )   HTML ( )   PDF (454KB) ( )   In order to explore the effects of slow-release fertilizers on rice growth and yield under different cultivation methods, the Zhanghe Irrigation District in Hubei Province was selected as the research area, and four treatments including “transplanting + conventional fertilizer” （F1N1）, “transplanting + slow-release fertilizer”（F1N2）, “direct seeding + conventional fertilizer” （F2N1）and “direct seeding + slow-release fertilizer”（F2N2） were set up, and the plot experiment was carried out with rice variety Zhuanliangyou Chaozhan as the experimental material. The results showed that F1N2 treatment had the best effect on rice plant height, reaching 127.6 cm at the yellow maturity stage, which was 15.6 cm higher than the F2N1 treatment, and the difference reached a very significant level. F1N2 treatment had a very significant effect on rice tiller promotion, up to 28.6 per clumps, while F2N2 only 11.7. The rice yield of F1N2 treatment was 7 536 kg/hm2, which was 13.3% higher than that of F2N2 treatment, and 21.2% and 28.2% higher than that of F1N1 and F2N1 treatments, respectively.

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Research on the Techniques of Interplanting Vegetables in Greenhouses and Rice LI Rongbo 2022, 28(3): 96-99.  DOI: 10.3969/j.issn.1006-8082.2022.03.019 Abstract ( )   HTML ( )   PDF (320KB) ( )   Use the ditches next to the idle vegetable greenhouses to grow rice, and implement interplanting rice and vegetables, can make full use of arable land resources, increase rice planting area and reduce agricultural non-point source pollution, and increase the species diversity to control pests and diseases. When multiple crops of vegetables are grown in plastic greenhouses, excess water and fertilizer will leak into the ditches. These leaking fertilizers can ensure the normal growth of rice in the ditches. Interplanting rice with greenhouse vegetables can realize the recycling of agricultural resources, with obvious economic, social and ecological benefits. It is a model innovation of sustainable agriculture.

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Study on Precise and Quantitative Cultivation Technology of High-quality Rice Yunhui 290 LUO Ping, LING Qihong, LIU Yaorong, WANG Huaiyi, YANG Congdang, LI Ganghua 2022, 28(3): 99-103.  DOI: 10.3969/j.issn.1006-8082.2022.03.020 Abstract ( )   HTML ( )   PDF (528KB) ( )   The effects of different cultivation techniques such as local cultivation technology （T1）, implement accurate quantitative fertilization（T2）, accurate quantitative irrigation （T3）, and integrative precise and quantitative cultivation technology（T4）, on the growth period, leaf age, yield, yield composition and economic benefits of rice Yunhui 290, a large-scale popularized high-quality conventional rice variety were studied in Gejiu, Yunnan, China. The results showed that compared with T1 treatment, T2, T3 and T4 treatments significantly increased the yield by 21.0%~41.0% in 2019 and by 16.7%~65.4% in 2020, and increased the economic benefits by 20.6%~41.3% in 2019 and by 17.0%~63.8% in 2020. Among them, the T4 treatment had the most significant increase in yield and economic benefits, and the yield was extremely significantly higher than the other three treatments. The precise and quantitative cultivation technology is a high-yield and efficient cultivation method. The precise and quantitative cultivation method is a suitable cultivation method for high-quality conventional rice with high yield and efficiency.

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Planting Performance and High-yielding Cultivation Techniques of Early Maturing and High Yield Early Rice Variety Zhongzu18 in Jiangshan County LI Yun, LI Chengyong, CHEN Jianjiang, SHAO Xiaowei, XU Nanchang, WANG Honghang 2022, 28(3): 104-105.  DOI: 10.3969/j.issn.1006-8082.2022.03.021 Abstract ( )   HTML ( )   PDF (242KB) ( )   Zhongzu18 is an early-maturing and high-yielding indica rice variety bred by China National Rice Research Institute and Zhejiang Wuwangnong Seeds shareholding Co., Ltd. It was approved by Zhejiang Variety Approval Committee in April 2020 and is suitable for planting as early rice in Zhejiang. In Jiangshan county, it was introduced from 2018 and performed well in the field, showing the characteristics of early maturity, high yield and stable yield, strong resistance to disease, strong lodging resistance, strong tillering ability, and many effective spikes. The yield potential of high-yield cultivation can reach 10.00 t/hm 2 or more. This paper introduced the planting performance and the key points of high-yield cultivation techniques of Zhongzu18 in Jiangshan county.

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Breeding and Utilization of Excellent Indica Thermo-sensitive Genic Male Sterile Line 504S with High Combining Ability CONG Xihan, RUAN Xinmin, SHI Fuzhi, DU Hongyang, LUO Yuxiang, LUO Zhixiang 2022, 28(3): 106-108.  DOI: 10.3969/j.issn.1006-8082.2022.03.022 Abstract ( )   HTML ( )   PDF (312KB) ( )   504S is a new indica thermo-sensitive genic male sterile line in rice, bred by the Rice Research Institute of Anhui Academy of Agricultural Sciences by self-crossing for five years, derived from the cross of 1892S and 65B. It has the characteristics of good plant type, high chlorophyll content, strong tillering ability, low critical temperature of fertility alteration, high outcrossing rate, high combining ability and so on. It was registered by the Anhui Provincial Crop Variety Approval Committee in 2013. The new two-line hybrid indica rice combinations Liangyou 5078 and Liangyou 5077 bred from 504S have the characteristics of high quality, high yield and stress resistance, and have been registered and released for commercial production by the National Crop Variety Approval Committee in 2019 and 2020 respectively.

Cultural Column

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The Experiene and Exploration of Coperation Development in Agriculture Heritage and Rice-clutivation Culture in Zhejiang LIN Chai, ZHANG Xiaoling, ZHANG Xiling, WANG Yahui, WANG Hao, FANG Qiaokung 2022, 28(3): 109-114.  DOI: 10.3969/j.issn.1006-8082.2022.03.023 Abstract ( )   HTML ( )   PDF (808KB) ( )   Agricultural cultural heritage is the most vital living carrier to inherit and promote rice culture. Research on the protection and utilization of important agricultural cultural heritage is of great significance to advance the development of rice culture. At present, Zhejiang provience has the largest number of China-NIAHS and GIAHS in China. This article expounds the relationship between agricultural cultural heritage and rice culture, introduces the resources of Zhejiang’s important agricultural cultural heritage, analyzes and discusses the path and achievements of Zhejiang’s agricultural cultural heritage to promote the development of rice culture.The study provide a new perspective to push ahead with the rice-clutivation culture getting prosperity and development.