北疆棉花新陆早6号和新陆早7号光合特点分析  

Analysis on Photosynthesis Characteristics of Xin luzao No.6 and Xin luzao No.7 in North Xinjiang

作　　者：王登伟[1] 黄春燕[1] 李少昆[1] 曹连莆[1] 

机构地区：[1]石河子大学新疆作物高产研究中心,新疆石河子832000

出　　处：《新疆农业大学学报》2001年第4期12-16,共5页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金资助项目 (3976 0 0 4 0 )

摘　　要：北疆棉花品种新陆早 6号和新陆早 7号单叶光合速率 (Pn)的高值期在盛花期 ,新陆早 7号的单叶 Pn 明显高于新陆早 6号。新陆早 6号与新陆早 7号群体光合速率 (CAP) 对密度的反应具有不一致性 ,栽培密度对于CAP的影响至关重要。盛花期～吐絮期 ,冠层中的上、中、下叶层群体光合速率变化具有一定的规律 ,吐絮期冠层上层作为棉株C的主要来源 ,冠层郁蔽过早 ,直接降低中。The maximum value of single leaf photosynthesis rate is in the full blossom stage, actually Xin luzao No.7's photosynthesis rate is much higher than Xin luzao No.6.Canopy apparent photosynthesis rate (CAP) is largely adjusted by population density, but the response of different population density to CAP is remarkable and CAP is positively correlated with lint yields.Canopy structure is divided into three layers top, middle and lower layers respectively, from full blossom stage to open boll stage. CAP contributes to C source, which at the first comes from the lower layer, then middle layer, at last to the top layer.The top of canopy shade earlier, it will impact on middle and lower canopy to contribute to C assimilating. In cotton production, it will obtain higher yield to prevent canopy shade earlier.

关 键 词：棉花 光合 特点 分析 

分 类 号：S562.501[农业科学—作物学]