【摘要】 本试验对小麦光合作用日变化的类型、光合作用潜势及其评价方法进行了研究。根据旗叶净光合速率变化与 PAR变化拟合系数的不同 ,将小麦在强光、高温天气条件下光合作用的变化分为部分拟合型、基本拟合型、完全拟合型三种形式。旗叶净光合速率 /光合有效辐射 (PAR)拟合系数越大 ,品种对强光、高温条件的适应能力越强。光合潜势 (小麦净光合速率、光合速率 / PAR拟合系数、单茎旗叶面积以及每公顷主茎数量四者的乘积 )与小麦产量及产量潜力呈显著的正相关 ,相关系数均为 0 .96更多还原

【Abstract】 In this article, the photosynthesis diurnal variation types of flag leaf and evaluation method of photosynthetic potentiality were studied in winter wheat under powerful radiationed?high temperature conditions . According to the fit coefficients between net photosynthetic rates and PAR under powerful radiation and high temperature conditions, the diurnal variation of photosynthesis could be divided into part fit model? fundamental fit model and complete fit model. The higher the fit coefficients between net photosynthetic rate and PAR were, the stronger the net photosynthesis adaptive abilities of flag leaf were under powerful radiation and high temperature conditions . Photosynthetic potential (product of net photosynthetic rates, the fit coefficients between photosynthetic rates and PAR, flag leaf area/stem, main stem number/hm 2) could be used to exactly forecast wheat photosynthetic potentiality . There were remarkable positive correlations between photosynthetic potentiality and wheat production or production potentiality. The correlation coefficients were 0.96, equally.更多还原