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大豆光合冠层的充分繁茂但又不过分郁蔽是截获更多光能,取得高产的基础。据研究,由于品种特性的不同,最适宜的叶面积系数也不相同。比如早期研究结果认为大豆、水稻、小麦等最适宜叶面积指数为4。但近年研究结果认为应超过4。 提高群体最适叶面积指数,主要应从育成适于密植的品种来解决。据研究,分枝多少、叶柄角度及叶柄长度均影响大豆品种对密度的反应。分枝多少又很易受密度及环境的影响,叶柄角度虽然有某些差异但并未能明显改变株冠结构。从表现上看,缩短叶柄能明显地改变株形。因此,选育短叶柄品种,对于提高群体密度,提高最适叶面积指
Soybean photosynthetic canopy full of lush but not overly submissive is intercepted more light energy, high yield basis. According to the study, due to the different characteristics of varieties, the most suitable leaf area coefficient is not the same. For example, earlier studies suggested that the most suitable leaf area index for soybean, rice and wheat is 4. However, in recent years, the results of the study should be more than 4. Increase the population of the most suitable leaf area index, mainly from breed suitable for close planting varieties to solve. According to research, how many branches, petiole angle and petiole length affect the response of soybean varieties to density. The number of branches and susceptible to density and environmental impact, although some differences in petiole angle but did not significantly change the canopy structure. From the performance point of view, shortened petiole can significantly change the plant shape. Therefore, the selection of short petiole varieties, for increasing population density, increase the optimum leaf area refers to