Studies on the Starch Contented in the Tissues of Rice Plant : (2) Effects of shading and nitrogen supply on the development of kernels and on the amount of starch stored in the culm internodes

[摘要] The present study was carried out to make a part of a research of the relations between the amount of starch stored in the culm of the rice plant and ripening of the kernel, under controlled light intensity and nitrogen supply before and after the heading time. During the period when the plant retained abundant green leaves, the starch in the culm were comparatively small in amount and in size ; while at the time of maturation when both the fruit-bearing percentage and the weight of kernels had begun to increase, starch of greater amounts and of larger grain siszes were found remaining in the culm. Shading the plant at the ripening period retarded the fruiting process probably because of restriction of photosynthesis and of translocation of the products to the panicle.

[学科分类] 农业科学（综合）