陕单8806玉米品种适宜群体与源库性状指标研究  

Study of Suitable Groups and Source-sink Properties Index on Maize of Shandan8806

作　　者：任建宏[1] 薛吉全[2] 路海东[2] 马国胜[2] 

机构地区：[1]榆林学院,陕西榆林719000 [2]西北农林科技大学农学院,陕西杨凌712100

出　　处：《玉米科学》2010年第6期86-89,共4页Journal of Maize Sciences

基　　金：陕西省"13115"重大科技攻关项目(2009ZDGC-01)

摘　　要：通过对陕单8806玉米品种9个密度的试验结果表明,陕单8806夏播高产适宜密度为67 500～75 000株/hm2。群体库源比值随着密度的增加而增大,当库源比值大于1.5时(75 000株/hm2),源供应能力开始下降,产量显著减少。吐丝期叶面积系数保持在5.1左右时,群体内各层透光率适宜,受光态势良好,产量最高。随着密度的增加,前期的群体光合势增加,当密度过大时,吐丝25 d后的群体光合势下降。因此,合理密植、保证适宜的群体叶面积系数和良好的受光态势、维持库源性状在更高水平上的平衡是获得高产的根本。By the fact that two places,nine densities experiments dates to maize Shadan8806 for 2 years were analyzed.It was found that proper density of Shandan8806 summer seeding high yield was 67 500-75 000 plants/ha.Group source-sink ratio was enhanced with the density increasing.When source-sink ratio greater than 1.5(75 000 plants/ha),source deliverability began to come down,yield was notable fall off.The leaf area index of silking stage kept about 5.1,transmitting rate of tier were proper within the group respe...

关 键 词：夏玉米 密度 产量 源库 群体性状 

分 类 号：S51[农业科学—作物学]