Studies on the shedding in cotton plants. : (2) With special regards to the influences of stem growth, soil moisture and soil temperature upon the shedding.

[摘要] The author tested the influences of stem growth, soil moisture and soil temperature upon the shedding (of both squares and bolls) in two species, asiatic (G. Arboreum var. Shisomen) and upland (G. hirsutum, var. Acala). It was found that stem growth was larger in the asiatic than in the upland at the former half of the growth period, till the middle of August. But this tendency became entirely reverse at the latter half of the growth period, when the stem growth was larger in the upland than the asiatic. The asiatic shedded, always, more in squares than the upland during the all period. As soon as the stems impaired their growth, a few of squares emerged and their shedding became larger in both species. Moreover, a few of bolls set and shedded when their growth of stems began to be impaired. Shedding of bolls was nearly parallely circumstanced with the stem elongation as described above. Then it was suggested that more bolls might shedd in the vigorous vegetative growth is both species. No influence was found upon the shedding by soil moisture and soil temperature in this experiment.

[学科分类] 农业科学（综合）