大豆生态研究──Ⅵ．大豆叶片感光效应与生长发育关系的研究

A STUDY ON THE RELATIONSHIP BETWEEN THE RESPONSIBILITY TO PHOTOPERIOD OF SOYBEAN (G. MAX) LEAVES AND SOYBEAN DEVELOPMENT

叶片是感光部位。子叶和未展开叶的感光效应确定开花节位，叶片的感光效应确定生长速度。不论短光或长光叶片，均以延长开花天数中９０％的时间用于提高开花节位，以延长开花天数中１０％的时间用于增长叶龄．短光叶片生长速度全用于由于叶和未展开叶确定的开花节位，反应短光促进发育。长光叶片生长速度增长叶龄同时，提高开花节位，反应长光促进生长．叶片在扩大生长中产生的感光效应上递３节，在上递过程中发生感光效应综合平衡作用．复叶发生始到定形为展开感光效应持续期。本文还提出研究大豆光温生态的适宜光温条件。

Soybean(G. max)leaves are sensitive part to photoperiod. The responsibility to photoperiod of cotyleden and rolled leaf defines the flowering node, and the responsibility to photoperiod of leaves defines the growth speed. Either short daylength or long daylength heightens the flowering node taking a time of 90% of delayed flowering days, and increases leaf age takinga time of 10% of delayed flowering days. Short daylength promotes the development of soybean, and long daylength promotes the growth of soybean. The responsibility to photoperiod of leaves during enlarging goes up 3 nodes, and in the course of going up there is the comprehensive balanced effect of responsibility to photoperiod. The duration of the resiponsibility to photoperiod of leaves is from the occurance of trifoliates to the time when the leaf falls into a pattern. We also piont out the optimum condition of light and temperature to study soybean ecology of light and temperature.