种植密度对全膜双垄沟播玉米籽粒灌浆及产量的影响  

Effect of planting density on the grain filling characteristics and yield of maize with whole covering on double ridges and planting in catchment furrows

作　　者：张文斌[1] 杨祁峰 牛俊义[1] 孙学保[1] 牛芬菊 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]甘肃省农业技术推广总站,甘肃兰州730070 [3]甘肃省榆中县农业技术推广中心,甘肃兰州730100

出　　处：《甘肃农业大学学报》2010年第2期74-78,共5页Journal of Gansu Agricultural University

基　　金：甘肃省农业厅资助项目(甘农财[2007]13号)

摘　　要：以‘金凯2号’玉米为材料,研究了6种植密度对全膜双垄沟播玉米籽粒灌浆进程及产量的影响.试验设36 000(JK-A)、42 000(JK-B)、48 000(JK-C)、54 000(JK-D)、60 000(JK-E)、66 000(JK-F)株/hm26个播种密度处理.结果表明:适当增加种植密度可提高全膜双垄沟播玉米单位面积的产量.全膜双垄沟播玉米籽粒干物质积累过程呈"S"型曲线,可用Logistic模型进行模拟,相关系数达0.99以上.种植密度对全膜双垄沟播玉米单粒质量的影响主要是渐增持续期、最大灌浆速率、平均灌浆速率、缓增期灌浆速率和快增期灌浆速率所致,而灌浆持续期对其影响较小.Maize cultivar ＇Jinkai 2＇ was used as materials to investigate the effects of 6 planting densities on the grain filling characteristics and yield of maize with whole covering on double ridges and planting in catchment furrows.Six treatments were planned as 36 000（JK-A）,42 000（JK-B）,48 000（JK-C）,54 000（JK-D）,60 000（JK-E）and 66 000（JK-F）·hm-2. The results indicated that appropriate increasing planting density could improved the yield per unit area of maize.The maize grain dry matter accumulation process showed ＂S＂ curve,which could be simulated by the Logistic model,and the correlation coefficient reached more than 0.99.The effect of plant density on the single grain weight was mainly caused by the increasing duration,the maximum filling rate,the average filling rate,the slow filling rate and the rapid filling rate,while the effect of the filling duration was little.

关 键 词：玉米 种植密度 全膜双垄沟播 灌浆速率 LOGISTIC模型 产量 

分 类 号：S513.048[农业科学—作物学]