摘要
为了筛选羊粪深施条件下旱地玉米的合适种植密度,以当地玉米主栽品种先玉335为研究对象,设置了5个密度水平,通过大田试验,研究了不同种植密度对玉米农艺性状、产量及其构成因素、水分利用效率的影响。结果表明,随着种植密度的增加,株高、穗位高度、凸尖长均显著增加,茎粗、穗长、穗粗、百粒质量均显著减少,产量则呈先增后减趋势;并获得旱地玉米产量与种植密度的回归方程为Y=-504.73X2+6 241.3X-7 234.1,R2=0.816 2,合理种植密度为6.75万株/hm2,其理论产量可达到12 326.2 kg/hm2,且水分利用效率(WUE)最大,为27.06 kg(/mm.hm2)。
To get an optimum planting density for corn in dryland,Xianyu 335 as local main corn variety was used and five densities were set to study agronomic traits,yield and yield components,and water utilization efficiency under sheep manure application in deep soil.The result showed that,along with the increase of planting density,plant height,ear height and rare ear length increased significantly,while stem diameter,ear length,ear diameter and weight per 100 grains decreased.The yields increased firstly and decreased later.A regression equation of Y=-504.73X2＋6 241.3X-7 234.1（R2=0.816 2） was achieved.Based on the regression equation,the optimum planting density was 67 500 plants/hm2,the theoretical yields was 12 326.2 kg/hm2 and the highest water use efficiency 27.06 kg/（mm·hm2）.
出处
《山西农业科学》
2012年第5期459-461,469,共4页
Journal of Shanxi Agricultural Sciences
基金
国家农业部公益性行业项目(200903007-10)
山西省科技攻关项目(20110311037)
山西省农业科学院博士基金项目(YBSJJ1007)
关键词
旱地玉米
农艺性状
种植密度
产量
水分利用效率
dryland corn
agronomic trait
planting density
yield
water use efficiency
