大豆生态研究Ⅶ．光温综合作用与野生大豆营养生长关系的研究

叶片生长过程分未展开叶、展开叶、定形叶三个阶段．未展开叶生长速度随气温升高而加快．气温＞２８℃未展开叶生长速度不再加快．气温升高幅度＞当天未展开叶生长速度、反应高温促进生长而开始发生分枝．复叶自展开到定形为１３～１４天，反应了大豆感光效应持续期。展开叶的感光效应发生初生分枝．定形叶的感光效应发生次生分枝。

STUDY ON SOYBEAN ECOLOGY Ⅶ. RELATIONSHIP BETWEEN THE COMPREHENSIVE EFFECTOF PHOTOPERIOD AND TEMPERATURE AND VEGETATIVE GROWTH OF WILD SOYBEAN(GLYCINE SOJA)

The growth of soybean leaf can be divided into three stages:rolled leaf,unrolled leaf,shaped leaf.The growth rate of rolled leaf was speeded up with the increase of air temperature,but it was no longer increased when air temperature was over 28℃.The date at which the amplitude of risen air temperature>the growth speed of rolled leaf,showed that high temperature promoted growth and branches occured.It was about 13-14 days from theunfolding of trifoliates to the time when it falls into a shaped pattern.This suggested a duration of the responsibility to photoperiod of soybean.The responsibility to photoperiod of unrolled leaf promoted the occurance of primary branches,and that of a pattern-shapedleaf promoted the occurance of secondary branches.