作物学报2011，Vol.37Issue(7)：1301-1307,7.DOI:10.3724/SP.J.1006.2011.01301
种植密度对高产夏玉米登海661产量及干物质积累与分配的影响
Effect of Plant Density on Grain Yield Dry Matter Accumulation and Partitioning in Summer Maize Cultivar Denghai 661
摘要
Abstract
The effects of plant density on the dry matter accumulation and distribution were studied under high yield condition to provide a scientific basis for the cultivation and breeding of high-yielding maize. Summer maize cultivars Denghai 661 and Nongda 108 were used as the experimental material and planted with different planting densities. The results showed that, population grain yield and dry matter accumulation increased significantly with the increasing of plant density, while the per plant were decreased. Denghai 661 had a high growth potential at 90 000 plant ha"1, which was the optimum plant population for the maximal grain yield. At anthesis and milking stages, the decrease rate of stem dry matter accumulation was greater than that of leaf with increasing plant density, which was on the contrary at maturity stage. So the effects of plant density on stem dry matter accumulation were significantly stronger than that before milking stage, which was on the contrary after milking stage. After milking stage, the transportation efficiency of both stem and leaf reduced significantly with the increasing of plant density, the contribution rate of stem also reduced significantly, but leaf increased. The stem dry matter transportation contributed more than leaf s to the grain yield under the density from 30 000 to 90 000 plant ha-1, but the leaf dry matter transportation contributed more than stems to the grain yield under the density from 105 000 to 135 000 plant ha-1.关键词
高产夏玉米/种植密度/产量/干物质积累与分配Key words
High-yield summer maize/ Plant density/ Grain yield/ Dry matter accumulation and partitioning引用本文复制引用
肖鑫辉 ,李向华 ,刘洋 ,张应 ,王克晶..种植密度对高产夏玉米登海661产量及干物质积累与分配的影响[J].作物学报,2011,37(7):1301-1307,7.基金项目
本研究由国家重点基础研究发展计划(973计划)项目(2009CB118602),国家公益性行业(农业)科研专项(200903003)和山东省玉米良种工程项目(鲁农良种2010-6)资助. （973计划）
