南疆杏棉复合系统条件下棉花冠层的光特性  

Study on photosynthetic characteristics of cotton canopy under apricot-cotton system in the south Xinjiang

作　　者：张建雄[1] 刘春惊 张保军[1] 谭永军 陈瑞萍 陈耀锋[1] 李中国[1] 

机构地区：[1]西北农林科技大学农学院,陕西杨凌712100 [2]新疆轮台县农业技术推广站,新疆轮台841600

出　　处：《干旱地区农业研究》2010年第4期173-178,共6页Agricultural Research in the Arid Areas

基　　金：国家科技支持计划项目(2007BAD36BO3-3)

摘　　要：为了探明杏棉复合系统条件下棉花冠层光合特性及遮荫对棉花产量的动态影响,以中棉43号为试材,研究了4种复合系统下棉花冠层光照强度、光合有效辐射(PAR)、叶面积指数(LAI)及产量构成要素。结果表明:宽幅棉花冠层光照强度、PAR、LAI优于窄幅棉花(即:6 m×4 m>6 m×3 m>4 m×2 m>4 m×1.5 m),棉花冠层各光合指标在间作带中从东到西呈现出由小增大再减小的变化趋势;4种复合系统下棉花产量及主要生长指标有较大差异,其中各系统间籽棉产量、蕾铃脱落率、收获株数均达到极显著差异,6 m×4 m模式下平均籽棉产量达到6 092.59 kg/hm2,是4 m×1.5 m模式的3.1倍;各复合系统产值与单作田产值的大小表现为6 m×4 m>6 m×3 m>CK>4 m×1.5 m>4 m×2 m。A study was carried out to find out the photosynthetic characteristics of cotton canopy and dynamic effects of shading on cotton yield under apricot-cotton system.With the cotton variety of Zhongmian 43 as test material and under four types of apricot-cotton system,the cotton canopy intensity of illumination,photosynthetic active radiation,leaf area index and constituent elements of yield were studied.The result showed that： ① The canopy intensity,photosynthetic active radiation,leaf area index of cotton sowed in broader width is better than that in narrower width（6 m×4 m6 m×3 m4 m×2 m4 m×1.5 m）,and the graphic trends increased at first and then decreased.② The cotton production and the main growth parameters are extremely different under the four different modes：the cotton yield,abscission rate of boll,plant quantity of harvest is significantly different,and the average cotton yield reached 6 092.59 kg/hm2 under the mode of 6 m×4 m,which is 3.1 times of that under the mode of 4 m×1.5 m mode.③ The order of output value of both monoculture and apricot-cotton system is： 6 m×4 m6 m×3 mCK4 m×1.5 m4 m×2 m.

关 键 词：杏棉复合系统 棉花 光照强度 光合有效辐射 叶面积指数 

分 类 号：S562.048[农业科学—作物学]