水稻根系分布与叶角关系的研究初报

1983—1984年,通过群体水培、土培试验,在控制水稻根系不同分布空间形状情况下,研究了叶角与根系分布的关系,其结果主要表现如下:1.根系分布较深且多纵向时,叶角较小,叶片趋向于直立;根系分布较浅且少纵向时,叶角较大,叶片趋向于披垂。2.叶角的大小同时受叶片大小的影响,根系分布较浅且少纵向时,较大的叶片更易披垂,叶角更大,

The Relationship between Root Distribution and Leaf Angle in Rice Plant

In 1983-1984,the relationship between leaf angle and root distribution was investi-gated in rice cultivated in nutrient solution and soil.The different root systems were estab-lished by controlling the root distribution space.The results were as follows:1.The deeper the root distribution,with vertical direction more than lateral,themore erect the leaf blade was,Otherwise the leaf was more likely drooping.2.Leaf angle was also affected by leaf size.The larger the leaf size,the wider the leafangle was.However,The angle of bigger leaf blade could be smaller if root system wasdeeper in vertical than lateral.The erectness of leaf could be maintained in deep rootsystem.The experiment indicated that,in high yield cultivation establishment of deeper rootdistribution is useful to improve ventilation and penetration of light as well as to increasethe photosynthesis and yield in rice community.