排灌机械工程学报Issue(12)：1091-1097,7.DOI:10.3969/j.issn.1674-8530.14.0008
种植密度对制种玉米根冠生长及耗水量的影响
Effect of planting density on root -shoot growth and water utilization efficiency of seed corn
摘要
Abstract
To study the growth and water depletion of seed corn with different planting densities,field experiments were conducted from March to September,2012 and 2013,at the Wuwei Experimental Station of Crop Water Use,Ministry of Agriculture.Five planting densities that were 67 500,82 500, 97 500,112 500 and 127 500 plants hm -2 were conducted in 2012,and a higher planting density of 142,500 plants hm -2 was added in 2013.The root and canopy growth,evapotranspiration (ET)and grain yield of seed maize with different densities were observed.Results indicate that the effect of planting density on crop height is not significant.There is a negative correlation between leaf area per plant and planting density.With the increase of planting density,population biomass,the root dry weight in deep soil (71 -100 cm)and the ET increase,while the individual biomass,the root length, the root surface area and the bottom transmittance decrease.The water utilization efficiency and grain yield increase first and then decrease with the increase of planting densities.Considering agricultural production costs and water consumption factors,the recommended local seed corn planting density is 112 500 plants hm -2 .关键词
制种玉米/种植密度/根冠生长/产量/水分利用率Key words
seed corn/planting density/root -shoot growth/grain yield/water utilization efficiency分类
农业科技引用本文复制引用
李栋浩,姜雪连,佟玲..种植密度对制种玉米根冠生长及耗水量的影响[J].排灌机械工程学报,2014,(12):1091-1097,7.基金项目
国家863计划项目（2011AA100502）；国家自然科学基金资助项目（51379208）；水利部公益性行业科研专项经费资助项目 （）
