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在室外条件下,研究了单—高剂量B—9的三个不同施用时期对春蚕豆品种Maris Bead的株高、同化物的分配、产量及产量结构的影响。收获时由于不同节间的缩短,所有处理显著降低植株高度。五叶期喷施B—9暂时抑制了营养生长,提高了收获指数。十五叶期施用B—9在整个后期抑制营养生长,增加了收获指数。二十五叶期施用的B—9增加了总干物重和产量。三个处理均增加了每株豆荚数和产量,对单粒重和每荚粒数无影响。
Under outdoor conditions, the effects of single-high-dose B-9 on the plant height, assimilate distribution, yield and yield structure of the spring broad-bean variety Maris Bead were studied. All treatments significantly reduced plant height at harvest due to shortening of different internodes. Five-leaf spraying B-9 temporarily inhibited the vegetative growth and increased the harvest index. Fifteen-leaf stage application of B-9 inhibited vegetative growth throughout the late stage and increased the harvest index. B-9 application at twenty-five leaf stage increased total dry weight and yield. All three treatments increased the number of pods and yield per plant and had no effect on single grain weight and number of pods per pod.