华北农学报Issue(z1)：332-336,5.
氮肥对夏玉米群体构建及光合特性的影响
Effects on Canopy Building and Photosynthesis Traits of Summer Maize
摘要
Abstract
In this study ,different N application timing and levels were applied for understanding the effects on maize canopy structure and photosynthesis traits .The results showed that:canopy structure indexes ( leaf angle above ear layer,LOV,and LAI,etc.),photosynthesis capability indexes (Pn) of ear layer could be used as standards for the evaluation of high yielding canopy structure .The nitrogen application affected those indexes .When nitrogen fer-tilizer application rate was 180 kg/ha,it should be applied before sowing as basal fertilizer ,by which leaf angle a-bove the ear was smaller ,LAI in the prophase increased faster while reduced slower after silking stage ,and LOV and Pn were larger in the silking stage .When the nitrogen fertilizer rate was 75 kg/ha,8-leaf stage was suitable for a-chieving good canopy structure .Under N amount of 75 kg/ha,leaf angle above the ear was smaller ,while LOV was larger and LAI was ideal ,and thus Pn was high ,therefore this canopy structure was highly efficient .关键词
夏玉米/冠层构建/叶向值/光合速率Key words
Summer Maize/Canopy structure/Leaf oriented value ( LOV)/Photosynthesis分类
农业科技引用本文复制引用
张丽丽,王璞,杨海龙,付俊,景希强..氮肥对夏玉米群体构建及光合特性的影响[J].华北农学报,2013,(z1):332-336,5.基金项目
国家玉米产业技术体系 （）
