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Effect of Planting Density on Grain-Filling and Mechanized Harvest Grain Characteristics of Summer Maize Varieties in Huang-Huai-Hai Plain

文献类型： 外文期刊

作者： Yue, Haiwang 1 ; Bu, Junzhou 1 ; Wei, Jianwei 1 ; Chen, Shuping 1 ; Peng, Haicheng 1 ; Xie, Junxue 1 ; Zheng, Shuhong; 1 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Hebei Prov Key Lab Crops Drought Resistance Res, Dryland Farming Inst, Hengshui, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Hebei Prov Key Lab Crops Drought Resistance Res, Dryland Farming Inst, Hengshui, Peoples R

关键词： Planting density; Grain-filling; Maize; Yield; Logistic equation; Correlation

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2018 年 20 卷 6 期

页码：

收录情况： SCI

摘要： Three maize varieties were planted as the main corn varieties in the Huang-huai-hai Plain as materials with five planting densities. Differences in grain filling and mechanised harvest grain characteristics to planting density amongst summer maize cultivars were examined. As plant density increased, the 100-grain dry weights of the three varieties gradually decreased. In the filling period, the 100-grain fresh weights increased initially and then decreased, and the 100-grain fresh weights decreased as plant density increased. At different densities, the grain-filling rates of the three varieties showed single-peak curves, and the highest peak of the grain-filling rate was achieved 30 days after pollination. In the whole grain-filling period, the different densities of the three maize varieties exhibited a decline in the percentage of grain water (PGW). The grain-filling processes of maize varieties with different plant densities were analysed with a logistic model, and the total filling period was divided into gradual increase stage, rapid increase stage and slow growth stage. The yield factors of the three varieties were also analysed. With the increased density, the number of lines per ear (NE), the number of grains per line (NL) and 1000-grain weight (GW) decreased. The grain yield initially increased and then decreased. The maximum yields of Zhengdan958 and Liyul6 were achieved at a density of 75,000 plants ha(-1), and the yield of Hengdan6272 was obtained at 90,000 plants ha(-1). These results indicated that the negative effects of dense planting on grain filling and mechanised harvest grain functions in Hengdan6272 were lower than those in Zhengdan958 and Liyul6 and suggested that the yielding potential of the former variety was higher than that of the latter two. (C) 2018 Friends Science Publishers.

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