种植密度对“雅玉青贮8号”玉米产量及相关性状的影响  

Effects of planting density on yields and related characters of silage corn"Yayu 8"

作　　者：徐晓梅[1] 陆雪珍[2] 潘春丹[1] 

机构地区：[1]上海市浦东新区农业技术推广中心,上海201300 [2]上海市农业技术推广服务中心,上海201103

出　　处：《上海农业学报》2011年第2期156-158,共3页Acta Agriculturae Shanghai

基　　金：上海市科技兴农推广项目[青贮玉米新品种及其高产栽培技术示范推广(2007-2-4号)]资助

摘　　要：以优质杂交种"雅玉青贮8号"为材料,研究不同种植密度下青贮玉米生长变化以及对产量和营养成分的影响。结果表明:随密度增加,植株增高,茎粗变细,产量随密度增加有所上升,8.25万株/hm^2时产量最高。综合水分及粗蛋白、酸性洗涤纤维和中性洗涤纤维等营养成份含量分析,在8.25万株/hm^2和9.75万株/hm^2的种植密度下,其水分含量和营养成分含量比较合理。结合产量分析,8.25万株/hm^2的种植密度较能发挥"雅玉青贮8号"优质高产特性。Field experiments with silage corn ＂Yayu 8＂ were carried out under 4 planting densities to study the effects of planting density on the growth, yield and nutrient content of the corn. The results showed that with the density increasing the corn increased in plant height and yield but decrease in stem diameter, and when the density was 82 500 plants/hm^2 the corn yield was the highest. The integrated analysis of moisture, crude protein, acid detergent fiber, neutral detergent fiber and other nutrient contents indicated that under the planting densities of 82 500 and 97 500 plants/hm^2 the moisture and nutrient contents of the corn were relatively reasonable. It was concluded from the above results that the planting density of 82 500 plants/hm^2 could better exhibit the high-yield and good-quality characteristics of silage corn ＂Yayu 8＂.

关 键 词：青贮玉米 种植密度 产量 营养成分 

分 类 号：S513.4[农业科学—作物学]