作物的叶片是进行光合作用、呼吸作用、和蒸腾作用的主要器官,对作物产量的形成影响很大。为此,进行叶片生长规律一叶片出现早晚、生长快慢、叶面积大小及功能期长短等方面的研究,在生产实践和理论上都有重要的意义。现将几年来的研究结果整理如下。本试验设在院教学农场内。前茬为马铃 Crop leaves are the main organs for photosynthesis, respiration and transpiration, which have a great influence on crop yield. Therefore, it is of great significance both in production practice and theory to study the law of leaf growth as soon as possible, the speed of growth, the size of leaf area and the length of functional period. The results of several years now collated as follows. This experiment is located in the courtyard teaching farm. The stubble for the bell