以4种不同类型的夏玉米品种为材料，研究了不同时期其主要性状、干物质积累和分配及产量。结果表明：4种类型夏玉米的产量存在显著差异，在不同密度下产量也表现显著差异，其中大株特大穗型玉米品种CF2187的产量最高，具有相当大的生产潜力；4种类型夏玉米的LAI发展受密度和株型影响，高密度较低密度拥有更大的LAI及持续期，大株大穗型玉米品种的叶面积持续期最长；大株大穗型玉米品种的干物质积累最多，中株中大穗型玉米品种的经济系数最大。

The experiment studied the main characteristic, dry matter accumulation and distribution and yield of four types summer corn at different stages. The results showed that the yield of large plant-extra large ear type summer corn was the highest and had some extent of yield potential. The type and density had influence on the development of leaf area index(LAI), comparing with under lower density, under higher density the LAI was larger and kept longer period; dry matter accumulation of large plant-extra large ear type summer corn was most, and the economic coefficient (harvest index, HI) of middle plant-middle ear type summer corn was highest.

国家“十五”科技攻关项目(2001 BA508 B02-06)