【摘要】 不同大豆品种叶子的光合速率,随生育时期、叶位和年份不同而变化。其变化幅度在15～30毫克 CO₂·分米^-2·小时^-1。按早期到近期品种顺序依次增高。单叶的光合速率和产量很少相关。但每类群体,每个品种的主要生育时期的平均光合速率和产量都呈正相关,其相关系数 r=0.8592。在不同年份也保持相同趋势。大豆鼓粒时期的群体光合速度和产量是密切相关的,其相关系数r=0.9239。更多还原

【Abstract】 The relationship between net photosynthetic rate and yield formationin Soybean was studied in 1981～1983.The main results and conclusionsare summarized as follows:1.The photosynthetic rate of soybean is one important property inbreeding.The photosynthetic rate of leaves in different varieties gavedifferences on growing stages,leaf position,and changing years.Therange of varying intensity was within about 15—30 mgCo₂·dm^-2·hr^-1,and increased progressly from early developed varieties to modern varie-ties.2.The photosynthetic rate of single leaf,whether in July,August,and September,had little correlation with yield.But the average rate ofphotosynthesis in the principal growing stages of each variety in everypopulation was correlated positively with yield,and maintained thesame in different years.The correlation coefficient was about r=0.859⁺.3.In pod-filling stage of soybean,the photosynthetic rate of plant po-pultations,correlated closely with yield and give a ralatively high coeffi-cient r=0.92392更多还原