关键词: 水稻, 播量, 秧龄, 钵苗机插, 秧苗素质

Abstract:

The effects of sowing rate and seedling age on the quality of seedling were studied by using indica hybrid rice C Liangyouhuazhan as experimental material. The results showed that with the decrease of seedling age, seedling height, leaf height and root-shoot ratio decrease, leaf age, stem base width, total root length, root surface area, root branch number and root tip number decrease first and then increase. The leaf area and root mean diameter increased first and then decreased, while the weight-to-height ratio showed an upward trend. With the increase of sowing rate, the seedling height, leaf age and leaf height decreased first and then increased, the stem width, dry weight and weight-to-height ratio, total root length, root surface area, root mean diameter and root branch decreased. While the root-shoot ratio increased first and then decreased. According to the results of subordinate function value analysis, the comprehensive quality of the seedlings of 55 d and the seeding rate 2/hole was the best treatment.

Key words: rice, sowing rate, seedling age, machine transplanting with potted seedlings, seedling quality