在混播草场中,三叶草相应于伴生禾草的特性,在季节内和季节间往往是变化莫测的,因此,要作出建立和保持已有草场组分的管理决定是困难的。所以,对混播草场各组分之间的相互作用,需要有在生理学基础上的更多的理解,其中一个重要的方面,就是对阳光的竞争。三叶草表现性能低下,往往是由于禾草的荫蔽造成的,特别是在施大 In mixed-grass pastures, clover is often unpredictable in the seasons and in the seasons, corresponding to the characteristics of associated grass, and therefore it is difficult to make management decisions to establish and maintain existing grassland components. Therefore, the interaction between the components of the mixed sowing grasshopper requires more understanding on the basis of physiology. One of the important aspects is the competition with the sunshine. Clover performance is poor, often due to shade caused by grasses, especially in Shi large