黄淮海平原高产田作物群体结构特征  

Colony structural characteristics of crops on high-yield fields in Huanghuaihai plain.

作　　者：董振国[1] 刘瑞文[1] 

机构地区：[1]中国科学院地理研究所,北京100101

出　　处：《应用生态学报》1992年第3期240-246,共7页Chinese Journal of Applied Ecology

基　　金：黄淮海平原农业综合开发专题研究课题

摘　　要：本文利用实测资料分析了高产田作物群体结构特征。精播高产栽培麦田春季最大蘖数12×10~6/ha,群体最大叶面积指数5.5—6.0,成穗4.5—5.25×10~6/ha。传统高产栽培麦田春季最大蘖数15—18×10~6/ha,群体最大叶面积指数6.0—6.5,成穗6.0—7.5×10~6/ha。小麦营养生长与生殖生长期叶日积比,精播高产栽培麦田是1∶0.89,传统高产栽培麦田为1∶0.73。夏玉米种植密度主要受叶倾角的影响。紧凑型玉米品种的叶倾角大于65°,种植密度7.5—8.25×10~4/ha;平展型玉米品种的叶倾角小于50°,种植密度5.25—6.0×10~4/ha。Colony structural characteristics of crops on high-yield fields are analysed in this paper. For wheat with intensive farming, the maximum tillering number is 12×10~6/ha, maximum LAI is 5.5—6.0 and ear number is 4.5—5.25×10~6/ha, but for that with traditional farming, they are respectively 15—18×10~6/ha, 6.0—6.5 and 6.0—7.5×10~6/ha. The LAD ratio of vegetative to reproductive growth is 1:0.89 on high-yield field with intensive farming, and 1:0.73 with traditional one. The planted density of summer corn is mainly decided by its leaf inclination. The arreet type of corn has an inclination of larger than 65°, and its planting density is 7.5—8.25×10~4/ha. That of lanceolate type is less than 50°, whose planting density is 5.25—6.0×10~4/ha.

关 键 词：叶倾角 群体密度 作物群体结构 

分 类 号：S314[农业科学—作物栽培与耕作技术]