山东农业科学2013，Vol.45Issue(4)：55-60,6.
密度对夏玉米农艺性状、干物质积累及产量的影响
Effects of Plant Density on Agronomic Characters,Dry Matter Accumulation and Yield of Summer Corn
摘要
Abstract
Four corn varieties mainly cultivated in Jining area were used as experiment materials to study the effects of different plant densities on yield, dry matter accumulation and agronomic traits. The results showed that with the increase of plant density, the plant height, ear position and leaf area index increased, but stem diameter and leaf anlge decreased; there was inconsistent changes between in different species. The growth rate decreased with the increase of density in dry matter accumulation of upground plant. The differences in growth rate of Zhengdan 958 and Xundan 20 cultivated in different densities was less than that of Lu-dan 981. The grain yield increased firstly and then decreased with the increase of density, which showed a parabolic change. Different varieties showed different changing rules. In conclusion, the plant density suitable for Zhengdan 958 and Xundan 20 in Jining area was about 6.75 × 104 plants per hectare, and that for Xianyu 335 and Ludan 981 was about 6. 0 × 104 plants per hectare.关键词
玉米/密度/叶面积指数/干物质积累/产量Key words
Corn/Density/Leaf area index/Dry matter accumulation/Yield分类
农业科技引用本文复制引用
宋春林,韩成卫,张春庆..密度对夏玉米农艺性状、干物质积累及产量的影响[J].山东农业科学,2013,45(4):55-60,6.基金项目
山东省农业良种产业化工程项目 （）
