摘要
本研究通过盆栽试验于大豆R_5时期,在晴天(f)和阴天(c)条件下,对大豆叶运动与叶面受光的研究结果表明,大豆各方位的叶数(％),晴天时,西和西南高于东和东北;阴天时,东西水平线以南各方位叶数(％)大致相近。还看出,不论晴阴天时,东西水平线以南高于以北。大豆叶片倾斜方向,主、副倾角,晴天时的叶数(％)正向>负向;阴天时,相反。大豆叶片倾斜角度,主、副倾角,晴天时,正向>负向,阴天时,相反。大豆叶面受光,晴天群体光照强度处于20～30KLx,阴天4～6KLx,多数未达光饱和状态。从叶片分布方位,叶片倾斜方向、角度和叶面受光关系看,在晴天时,由于太阳高度和位置变化,直射光多,主、副倾角正向角度大。为充分利用光能,大豆叶由东南向西南作调位运动。本研究进一步证实了叶枕中钾的含量增高时对叶片直立和扭曲起调节作用。
This study was conducted on the leaflet orientation - afjusting movement and light intensity on leaflets surface under the fine(f) and cloudy(c) weather during the R5- The results were shown that percentage of the number leaflet according to the directions was S>N and was WS>S>EN under the fand was ES=S = WS under the c. The upward inclinaion (UI) was bigger than downward inclination(DI) for percentage of leaflet inclination of main(sub)-angle of leaflet inclination. Percentage of leaflet main(sub)-angle of leaflet inclination was f>c when UI under the c and f<c when DI. Main(sub) angle of leafliet surface was UI>DI under the f and UKDI under the c.The light intensity on leaflets surface of plant communities was 20-30 KLx under the f and was 4 - 6 KLx under the c. The 65% of plant leaflets were not found the light saturation phenomenon. The relationship among leaflet orientation, leaflet inclination and light intesity was shown that main-angle of leaflet inclination of the UI was bigger and the leaflet orientation - adjusting movement was remarkable from ES to WS for more use the light energy.The investigation was shown that the K concentration in the pulvinus might have some role inregulation the bending and straighting movement of leaflets of soybean plant.
出处
《大豆科学》
CAS
CSCD
北大核心
1993年第1期37-44,共8页
Soybean Science
基金
国家自然科学基金
关键词
大豆
叶向
调位运动
光合作用
Soybean
Leaflet oriention
adjusting movement
light intesity of leaflet surface
