特早熟夏播玉米密度与经济产量及产量性状的关系  

Comparisons between Economic Yield,Yield Character and Density on Especial-early Summer Corn

作　　者：杜天庆[1] 郝建平[1] 杨锦忠[1] 刘秀红 

机构地区：[1]山西农业大学农学系,山西太谷030801

出　　处：《山西农业大学学报》2000年第1期9-12,共4页

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 7In 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.

关 键 词：特早熟夏玉米 密度效应 经济产量 产量性状 

分 类 号：S513.04[农业科学—作物学]