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

摘要/Abstract

摘要： 选用玉米品种登海661和农大108，设置不同种植密度，研究高产条件下种植密度对夏玉米产量及干物质积累与分配的影响。结果表明，种植密度增加后群体产量和干物质积累量显著增加，单株产量和干物质积累量反之。登海661在9万株 hm^-2时充分发挥了生长潜能，可获高产。随种植密度的增加，开花期和乳熟期茎秆干物质积累量的降幅大于叶片，主要影响茎秆干物质积累；成熟期茎秆干物质积累量降幅小于叶片，主要影响叶片干物质积累。乳熟期以后茎秆和叶片的干物质输出率均随种植密度增加显著减少，茎秆的贡献率随种植密度增加显著减少，而叶片的贡献率，随种植密度增加显著增加。密度3~9万株 hm^-2时茎秆对籽粒干物质积累量贡献率大，10.5~13.5万株 hm^-2时叶片对籽粒库建成影响大。

关键词:

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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

刘伟, 张吉旺, 吕鹏, 杨今胜, 刘鹏, 董树亭, 李登海, 孙庆泉. 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(07): 1301-1307.

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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链接本文: https://zwxb.chinacrops.org/CN/10.3724/SP.J.1006.2011.01301

https://zwxb.chinacrops.org/CN/Y2011/V37/I07/1301

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