摘要
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,根系分布较深且多纵向时较大的叶片仍可保持直立,较小的叶片更易直立,叶角更小。试验指出:叶角的大小在很大程度上受根系分布的调控。在群体叶面积指数较大的情况下,培育分布深而多纵向的根系,有利于改善群体通风透光,增加群体光合作用和提高产量。
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.
出处
《作物学报》
CAS
CSCD
北大核心
1989年第2期123-131,共9页
Acta Agronomica Sinica
关键词
水稻
根系分布
叶角
Rice
Root distribution
Leaf angle
