| 枣棉间作条件下棉花密度对棉花光合特性及产量影响 |
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| 引用本文： | 张东升,韩硕,王旗,刘军,张伟,张立祯,刘建国.枣棉间作条件下棉花密度对棉花光合特性及产量影响[J].棉花学报,2014,26(4):334-341. |
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| 作者姓名： | 张东升 韩硕 王旗 刘军 张伟 张立祯 刘建国 |
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| 作者单位： | 1.石河子大学，新疆 石河子 832003；2.中国农业大学，北京 100193 |
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| 基金项目： | 农业部公益性行业专项（201003043-01） |
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| 摘 要： | 在枣棉间作条件下,通过设置不同的棉花种植密度(13.5万、18.0万和22.5万株·hm-2),研究了密度对棉花光合作用及产量的影响。结果表明,间作棉花形态、荧光参数和光合特性受到枣树的显著不利影响,表现出明显的边行负效应。随着枣棉间距离的增加,不利影响减小,SPAD值、光系统II的实际光化学效率(ΦPSII)和净光合速率(Pn)显著增加;随着密度增加,间作棉花LAI和干物质质量显著增加。密度为18万株·hm-2的间作棉花的光系统II的实际光化学效率(ΦPSII)、净光合速率(Pn)、蒸腾速率(Tr)和产量显著高于13.5万株·hm-2和22.5万株·hm-2。在枣棉间作复合系统中,适当增加枣棉间距可以减轻枣树对棉花的不利影响,而较高的棉花密度也有利于棉花高产。
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| 关 键 词： | 枣棉间作 叶面积指数 光合特性 荧光参数 遮荫 |
| 收稿时间： | 2013-01-18; |
Effect of Plant Density on Photosynthesis Characters and Yield of Cotton in the Jujube-cotton Intercropping Systems |
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| Zhang Dongsheng,Han Shuo,Wang Qi,Liu Jun,Zhang We,Zhang Lizhen,Liu Jianguo.Effect of Plant Density on Photosynthesis Characters and Yield of Cotton in the Jujube-cotton Intercropping Systems[J].Cotton Science,2014,26(4):334-341. |
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| Authors: | Zhang Dongsheng Han Shuo Wang Qi Liu Jun Zhang We Zhang Lizhen Liu Jianguo |
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| Institution: | 1. Shihezi University, Shihezi, Xinjiang 832003, China; 2. China Agriculture University, Beijing 100193, China |
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| Abstract: | The research was done in the jujube-cotton intercropped systems in 2012 and 2013 in order to investigate the effect of plant density on physiological property and production of cotton. Three densities (1.35×105 plants·hm-2, 1.8×105 plants·hm-2 and 2.25×105 plants·hm-2) characterized by changing plant distance within a row were set up. The results indicated that there was a negative influence of jujube on morphology, fluorescence parameters and photosynthesis characters for intercropping cotton. Two rows of cotton at the border had a significant lower SPAD, actual quantum efficiency of photosystem II (ΦPSII) and net photosynthetic rate (Pn) due to being affected seriously by jujube. The LAI and dry matter significantly increased with the plant densities. The cotton with the density at 1.8×105 plants·hm-2 had a higher actual quantum efficiency of photosystem II (ΦPSII), net photosynthetic rate (Pn), transpiration rate (Tr) and production compared to that of the cotton with the density at 1.35×105 plants·hm-2 and at 2.25×105 plants·hm-2. So we conclude that the productivity of cotton in the jujube-cotton intercropping systems can be improved by increasing the distance between cotton and jujube and by optimizing cotton plant density. |
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| Keywords: | LAI photosynthesis characters fluorescence parameter shading |
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