干旱区枣棉复合系统对植物生长及光合特性的影响  

Effects of Jujube-Cotton Agroforestry Systems on Plants Growth and Photosynthetic Characteristics in Arid Area

作　　者：王婷[1] 马亮[1] 马英杰[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《西南农业学报》2016年第11期2588-2593,共6页Southwest China Journal of Agricultural Sciences

基　　金：新疆自治区青年科学基金"干旱区成龄枣树滴灌根系分布数值模拟研究"(2013211B18)

摘　　要：以枣树和棉花为研究对象,探讨了大田条件下,枣棉复合系统对植物生长及光合特性的影响。结果表明:单作、间作模式下枣树和棉花地上生长指标及叶片光合特性间均存在显著性差异,枣树表现为单作模式大于间作模式,而棉花则为间作模式大于单作模式。单作、间作模式下枣树叶片有明显的光合"午休"现象,而棉花则没有出现该现象。枣树与棉花共生期,从枣树、棉花地上部生长指标以及间作中棉花偏土地当量比可知,间作增强了棉花的间作优势,提高了复合系统的经济效益。复合系统种间地上部之间存在光能的竞争,这种竞争减弱了间作枣树对光能的利用,增强了间作棉花的光合作用能力,有利于间作棉花利用种间光合作用优势积累更多的干物质。Taking the jujube and cotton as the research object, in the field condition, effects of jujube and cotton complex system on plant growth and photosynthetic characteristics were studied. The results showed that： in monoculture and intercropping mode, there were significant differences between jujube and cotton on the aboveground growth index and leaf photosynthetic characteristics, jujube showed that monoculture was greater than intercropping, but cotton showed that intercropping was greater than monoculture. In monoculture and intercropping mode, jujube leaves have obvious ＇ midday depression＇ phenomenon, while cotton was not the behavior occurs. Jujube and cotton intergrowth, from jujube and cotton on the aboveground growth index and cotton partial land equivalent ratio, intercropping enhanced cotton intercropping advantage and improved the economic efficiency of the composite system. The competition of light energy existed between the upper part of the composite system, and this competition has weakened the light energy utilization of jujube intercropping, enhanced photosynthetic capacity of intewropping cotton, in favor of intercropping cotton with the accumulation of more dry matter accumulation between the two types of photosynthesis.

关 键 词：干旱区 枣棉复合系统 光合特性 光竞争 

分 类 号：S344.2[农业科学—作物栽培与耕作技术]