| 特早熟夏播玉米密度与经济产量及产量性状的关系 |
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| 引用本文： | 杜天庆,郝建平.特早熟夏播玉米密度与经济产量及产量性状的关系[J].山西农业大学学报(自然科学版),2000,20(1):9-12. |
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| 作者姓名： | 杜天庆 郝建平 |
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| 作者单位： | 山西农业大学农学系,山西太谷 |
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| 摘 要： | 本文研究了晋中盆地麦—秋两作栽培体系中特早熟夏玉米冀承单 3号的密度与经济产量及产量性状的关系 ,结果表明 :(a)经济产量—密度方程 ,单位面积穗数—密度方程呈二次抛物线型 ;百粒重—密度方程 ,穗粒数—密度方程呈直线下降型。 (b)密度 5 0 0 0～ 5 2 0 0株 / 6 6 7 ,空秆率 1 0 %左右 ,单位面积成穗45 0 0～ 46 0 0穗 / 6 6 7 ,穗粒数 44 0～ 45 0 ,百粒重 1 6 5～ 1 7 5g为最佳产量结构
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| 关 键 词： | 特早熟夏玉米 密度效应 经济产量 产量性状 |
Comparisons between Economic Yield,Yield Character and Density on Especial-early Summer Corn |
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| DU Tian-qing,HAO Jian-ping et al..Comparisons between Economic Yield,Yield Character and Density on Especial-early Summer Corn[J].Journal of Shanxi Agricultural University,2000,20(1):9-12. |
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| Authors: | DU Tian-qing HAO Jian-ping |
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| Abstract: | In this paper,We Systematically studied comparisons between economic yield,yield character and density on especial-early summer corn,Jichengdan 3,under two-cropping system in Jinzhong Basin.The results showed that: (a)economic yield-density relation and per unit area ear number-density presented quadric parabola equation;100-grain weight-density and ear-grain number-density,sharply linear falling relation.(b)The density was 5 000～5 200 plants/667;empty-stalk percentage,about 10%;survival ears per unit area,4 500～4 600 ears/667;ear-grain number,440～450;100-grain weight,\{16\^5～17\^5 g\}.Under the conditions,it was the best yield structure. |
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| Keywords: | Especial-early summer corn Density effects Economic yield Yield character |
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