Studies on ripening of rice : (I) Role of nitrogen in process of ripening of rice

[摘要] Role of nitrogen in process of kernel ripening of rice plant was studied from the standpoint of effect of nitrogen on formation of glumes, on dry weight production (production of starch and sugars) and on translocation of carbohydrate to the ear. High nitrogen level increases number of glumes formed as well as production of carbohydrate, but rate of increase in the former is greater than the latter. Therefore, in spite of increased yield, seed-setting rate and weight of 1000 kernels are reduced because of insufficent amount of supply of carbohydrate to the individual glumes. However retardation in carbohydrate translocation itself is not recognized.

[学科分类] 农业科学（综合）