应用生态学报2012，Vol.23Issue(5)：1286-1294,9.
新疆超高产棉花冠层光分布特征及其与群体光合生产的关系
Canopy light distribution and its correlation with photosynthetic production in super-high yielding cotton fields of Xinjiang, Northwest China
摘要
Abstract
Taking the super-high yielding cotton fields (lint yield 3≥4000 kg · hm-2) in Xinjiang as the objects, this paper studied the canopy light distribution, photosynthetic rate, and dry matter accumulation at different growth stages, as well as the relationships between the characteristics of canopy light environment and the photosynthetic production. From full flowering stage to late full boiling stage, the light absorption proportion in the upper, middle and lower canopy layers in the super-high yielding cotton fields was 2:2: 1, and the canopy transmission coefficients for radiation penetration and diffuse penetration were 0. 20-0. 55 and 0. 22-0. 56, respectively, being at reasonable level. The leaves in the middle and lower canopy layers could well accept light, and the leaf photosynthetic rate had little difference among different canopy layers. Compared with high yielding (3500 kg · hm-2) and generally high yielding (3000 kg · hm-2) cotton fields, super-high yielding cotton field had higher leaf area index and the highest canopy photosynthesis rate at early full boiling stage, and slowly decreased leaf area index, higher canopy photosynthesis rate, increased contribution of non-foliar organs to photosynthetic production, and larger dry matter accumulation from early boll-opening stage to full boll-opening stage. In cotton cultivation, to adjust the canopy structure for the equidistribution of light and canopy photosynthesis capacity in vertical direction could be the important strategy for the efficient utilization of absorbed light energy and the realization of super-high yielding.关键词
棉花/超高产/冠层结构/光分布/光合/非叶绿色器官Key words
cotton/ super-high yielding/ canopy structure/ light distribution/ photosynthesis/ non-foliar green organ.分类
农业科技引用本文复制引用
冯国艺,姚炎帝,罗宏海,张亚黎,杜明伟,张旺锋,夏冬利,董恒义..新疆超高产棉花冠层光分布特征及其与群体光合生产的关系[J].应用生态学报,2012,23(5):1286-1294,9.基金项目
国家自然科学基金项目(31060176)和国家"十一五"科技支撑计划项目(2007BAD44B07)资助. （31060176）
