华北农学报2011，Vol.26Issue(3)：182-188,7.
品种与密度对华北平原夏玉米产量及水分利用效率的影响
Effect of Cultivar and Plant Density on Summer Maize Grain Yield and Water Use Efficiency in North China Plain
摘要
Abstract
Field experiments of eight summer maize cultivars with three plant density degree were conducted in Fengqiu Experimental Station of Chinese Academy of Sciences from 2008 to 2010. The object of the study was to assess cultivar and plant density effects on summer maize grain yield and water use efficiency ( WUE ) , and with optimization of cultivar and density, to explore yield and WUE potential of summer maize. Cultivar and plant density affected maize grain yield significantly with difference between experiment seasons. There was 1 050 - 1 500 kg/ha difference between maximum and minimum grain yield affected by cultivar difference. Different cultivar grain yield response differently to plant density degree, and the grain yield of 60 000 - 67 500 plant/ha density was higher than 75 000 plant/ha density. The sunshine during maize growth affect grain yield significantly, and compared with annual value, sunshine hour decreased 56.6% , with corresponding 15% grain yield reduction. Effective light radiation of the leaves above ear has a positive relativity to grain yield. The results showed cultivar with higher grain yield had a higher WUE, and selecting higher yield cvivar is an important approach to promote WUE of summer maize.关键词
品种/种植密度/产量/光照/水分利用效率Key words
Cultivar/ Plant density/ Grain yield/ Sunshine/ Water use efficiency分类
农业科技引用本文复制引用
邵立威,王艳哲,苗文芳,孙宏勇,陈素英,张喜英..品种与密度对华北平原夏玉米产量及水分利用效率的影响 [J].华北农学报,2011,26(3):182-188,7.基金项目
耕地保育与持续高效现代农业试点工程 （）
中国科学院知识创新工程重大项目(KSCX1-YW-09-05) （KSCX1-YW-09-05）
河北省科技支撑项目(06220112D) （06220112D）
