作物研究Issue(2)：122-127,6.DOI:10.3969/j.issn.1001-5280.2015.02.03
栽培措施对棉花短季直播群体冠层结构和光合作用的影响
Effects of Cultivation Measure on Canopy Structure and Canopy Apparent Photosynthesis
摘要
Abstract
The field experiments on the planting densities,allocations of row-spacing,nitrogen application rate on the can-opy structure,canopy apparent photosynthesis and yield of cotton were conducted in Hunan.The results indicate that:the PAR fell and then increased with the process of growth period and was the highest during the boll opening stage.The PAR of the high density group was higher than that of low density group.The PAR of wide-narrow row spacing group was higher than that of equal planting spacing.During the boll opening stage,the transparency was the highest with the nitrogen appli-cation 180 kg/hm2.Equal planting spacing has relative higher transparency than wide-narrow row spacing.It showed that nitrogen application 180 kg/hm2 and equal planting spacing were good for maintaining higher transparency during the late period of duration.The transmissivity of direct light rate increased steadily with the process of growth rate.The planting density,allocations of row-spacing,nitrogen application rate had significant effect on the net photosynthetic rate of full squaring stage and full boll stage.The higher density canopy had relative higher canopy photosynthetic rate.Wide-narrow row spacing,compared with equal planting spacing,maintained at a relatively high level in photosynthetic rate.关键词
棉花/栽培/冠层结构/光合作用Key words
cotton/cultivation/canopy structure/canopy apparent photosynthesis分类
农业科技引用本文复制引用
王欣悦,刘爱玉,邹茜,向凤玲,欧阳燕莎..栽培措施对棉花短季直播群体冠层结构和光合作用的影响[J].作物研究,2015,(2):122-127,6.基金项目
湖南省棉花产业体系栽培专家岗位项目（湘农业联［2012］278号）。 （）
