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

doi:10.3724/SP.J.1006.2011.01301

Abstract

Abstract: The effects of plant density on the dry matter accumulation and distribution were studied under high yield condition hoping to provide a scientific basis for the cultivation and breeding of high-yielding maize, using summer maize cultivar 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, whichwas the optimum plant population for the maximal grain yield. At anthesis and milking stages, the decreaserateof stem dry matter accumulation was greater than that of leafwith 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, leaf increased. The stem dry mattertransportation contributed more than leaf’s to the grain yield under the density from 30 000 to 90 000 plant ha^-1, butthe leaf dry matter transportationcontributed more than stems to the grain yield under the density from 105 000 to 135 000 plant ha^-1.

Key words: High-yield summer maize, Plant density, Grain yield, Dry matter accumulation and partitioning

LIU Wei, ZHANG Ji-Wang, LV Peng, YANG Jin-Sheng, LIU Peng, DONG Shu-Ting, LI De-Hai, SUN Qiang-Quan. Effect of Plant Density on Grain Yield Dry Matter Accumulation and Partitioning in Summer Maize Cultivar Denghai 661[J].Acta Agron Sin, 2011, 37(07): 1301-1307.

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Effect of Plant Density on Grain Yield Dry Matter Accumulation and Partitioning in Summer Maize Cultivar Denghai 661

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