河南农业科学2013，Vol.42Issue(1)：23-27,5.
种植密度对夏玉米冠层光合特性的影响
Effect of Planting Density on Canopy Photosynthesis of Summer Maize
摘要
Abstract
The summer maize cultivars Zhengdan 958 and Xundan 20 were selected to study the effects of planting densities on the photosynthesis properties of canopy with four density treatments. The results showed that LAI of Zhengdan 958 increased with the increase of planting density. The light transmission of canopy was significantly higher in upper layer than in the lower layer. The chlorophyll content increased with the increase of planting density at first, then decreased when the density exceeded 82 500 plants/ha. Fv/Fm and qP were higher in the third leaf above ear than those in the ear leaf and the third leaf below ear,but NPQ was converse. With the advancing of development stages, the stem diameter increased first and then decreased,reaching the maximum in silking stage. The stem diameter of Xundan 20 decreased with the increase of density. The highest yield was obtained under the density of 90 000 plants/ha for Zhengdan 958 and 82 500 plants/ha for Xundan 20,and the highest yield of two cultivars were 12 166. 070,9 705. 709 kg/ha,respectively.关键词
玉米/密度/叶面积指数/透光率/叶绿素荧光参数Key words
maize/density/leaf area index/light transmission/chlorophyll fluorescence parametersr分类
农业科技引用本文复制引用
胡巍巍,赵会杰,李洪岐,袁利刚,赵雪娟,郑静静..种植密度对夏玉米冠层光合特性的影响[J].河南农业科学,2013,42(1):23-27,5.基金项目
国家粮食丰产科技工程项目(2006BAD02A07-1) （2006BAD02A07-1）
