不同时期遮阴对蚕豆光合特性及产量的影响

Effects of Shading at Different Growth Stages on Photosynthetic Characteristic and Grain Yield in Faba Bean

本文探讨了不同时期遮阴对蚕豆叶片叶绿素含量、光合速率和各器官产量的影响。试验结果表明,不同时期遮阴后蚕豆叶片的叶绿素含量和光合速率都比自然光照条件下有显著的提高,而且以出苗后76～105d遮阴表现出的差异最大。遮阴有利于蚕豆营养器官的生长,遮阴后茎和叶的干重较对照都有不同程度的增加,但生殖器官的形成和生长会受到阻碍,花和荚果的脱落率增大,荚果干重明显降低。

This article discussed the effects of shading on chlorophyll content, photosynthetic rate and dry matter weight to faba bean with different growth stages.The experiments indicated that the chlorophyll content and photosynthetic rate of leaf were significantly higher with shading treatment than those with control treatment,especially after 76～105 days,the difference was the greatest.Shading was favourable to the nutrition organ growth of faba bean.Compared with the control treatment,the dry weight of stem an...