冬小麦整个生长期中,净光合率数值是变动的,而各个处理间的平均净光合率变化较小。净光合率的变化,与气象因素密切相关;改善农业技术措施的主要影响在于改变叶面积,对净光合率的直接影响较小。小麦产量高低,主要决定于叶面积和光合势大小;但最大叶面系数不能超过5。 During the whole growth period of winter wheat, the net photosynthetic rate was varied, but the average net photosynthetic rate changed little among the treatments. The change of net photosynthetic rate is closely related to meteorological factors. The main effect of improving agricultural techniques is to change the leaf area, which has a direct impact on the net photosynthetic rate. The level of wheat yield is mainly determined by the leaf area and the photosynthetic potential size; however, the maximum leaf area coefficient can not exceed 5.