摘要
【目的】通过对枣棉间作系统内的光环境特征,以及棉花产量的水平分布特性进行研究,为合理调控枣棉间作模式提供理论参考。【方法】在棉花现铃期,通过TPS-2光合仪和LAI-2000冠层分析仪,分别测定棉花冠层的净光合速率和光合有效辐射日变化,以分析其与棉花产量的关系。【结果】(1)随着距枣树距离的增加,棉花冠层光合有效辐射、净光合速率日均值呈递增趋势;(2)枣棉间作系统内棉花产量水平分布表现出明显的差异性,枣树西侧的棉花产量高于东侧。【结论】在枣棉间作系统内,枣树和棉花的间距应保留1.2m左右,且行东间距应适当宽于行西,即可有效改善系统内棉花光环境条件,降低系统内光的竞争。
[ Objective ] The project aimed to provide a theoretical reference of reasonable regulation mode in jujube - cotton intercroppin$ system （JIE）. by studying the light environment characteristics and horizontal distribution characteristics of cotton yield in JIE. [ Method ] The diurnal variation net photosynthetic rate and photosynthetic active radiation of cotton canopy were determined by utilizing the TPS - 2 portable gas exchange fluorescence system, LAI -2000 canopy instrument in cotton blooming stage. [Result] （1） The diurnal variation net photosynthetic rate and photosynthetic active radiation of cotton canopy with distance from the jujube tree gradually increased; （2） In the JIE, the cotton yield in horizontal distribution showed significant differences. The cotton yield of jujube tree on the west side was higher than that on the east side. [ Conclusion ] It can effectively improve the light environmental condition and reduce competition within JIE if the space of jujube tree and cotton about 1.2 m is retained, and the line space at the east side is wider than that at the west side.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2011年第9期1624-1628,共5页
Xinjiang Agricultural Sciences
基金
国家科技部"十-五"支撑计划课题(2007BAD36B03-2)
关键词
枣棉间作系统
光合有效辐射
净光合速率
jujube - cotton intercropping system
photosynthetic active radiation
net photosynthetic rate
