山东农业科学2012，Vol.44Issue(6)：39-43,5.
种植密度和行距配置对玉米群体光分布与群体光合特性的影响
Effects of Planting Density and Row Spacing Form on Canopy Light Distribution and Photosynthesis Characteristics of Maize
摘要
Abstract
With the increase of planting density, the total capture ratio and the capture ratio in upper layer of the photosynthetically active radiation ( PAR) raised, while the capture ratio in ear - leaf and lower layers decreased. Under the three densities, the total capture ratio and capture ratio in ear -leaf and lower layers of the "80 +40" form was the largest; the capture ratio in upper layer was the highest under the form of "60 +60", and it decreased with the increase of the wide row spacing. The canopy apparent photosynthesis (CAP) rate after anthesis increased corresponding to the increase of density. At the same density, the sequence of CAP rate among all forms was "80 +40"＞"70 + 50"＞"60 + 60"＞ "90 + 30" and the difference became larger with the density raising. The canopy respiration ( CR) after anthesis decreased first and increased later. At each growth stage, the CR value and ratio of CR/TCAP increased with the density increase. Under the same density, the ratio of CR/TCAP of "80 +40" form was obvious lower than that of the other ones and the trend performed very conspicuous under higher densities.关键词
玉米/种植密度/行距配置/群体光分布/群体光合特性Key words
Maize/ Planting density/ Row spacing form/ Canopy light distribution/ Canopy apparent photosynthesis characteristics分类
农业科技引用本文复制引用
李耕,杨今胜,杨吉顺,柳京国,刘鹏,董树亭..种植密度和行距配置对玉米群体光分布与群体光合特性的影响[J].山东农业科学,2012,44(6):39-43,5.基金项目
国家自然科学基金项目(31071358、30871476) （31071358、30871476）
欧盟FP7国际合作项目(NUE-CROPS 222645) （NUE-CROPS 222645）
国家“十二五”科技支撑计划项目(2011BAD16B14):山东省财政支持农业重大应用技术创新课题(2010) （2011BAD16B14）
山东省良种工程玉米课题(2011) （2011）
