播期和播种密度对周麦18号产量及产量构成的影响  

Effects of Different Planting Date and Density on Yield and Yield Components of Winter Wheat Zhoumai18

作　　者：王丽娜 殷贵鸿 韩玉林 黄峰 唐建卫 于海飞 杨光宇 李新平 

机构地区：[1]河南省周口市农业科学院,河南周口466001

出　　处：《作物杂志》2012年第1期102-104,共3页Crops

基　　金：国家农业科技成果转化项目(2009GB2D000548);转基因生物新品种培育重大专项课题(2008ZX08002-003);河南省现代农业产业技术体系建设专项(2130199-ny);国家科技支撑计划项目(2011BAD07B02);现代农业产业技术体系建设专项(nycytx-03)

摘　　要：在低(180万株/hm2)、中(270万株/hm2)、高(330万株/hm2)3种播种密度条件下,研究了不同播期对周麦18号产量和产量构成的影响。结果表明,在相同播种密度下,不同播期对小麦产量影响有极显著差异;在相同播期下,不同播种密度对产量影响差异不显著。播期对周麦18号成穗数和千粒重有极显著影响,对穗粒数影响较小。成穗数是决定周麦18号产量的关键因素,但同时也制约穗粒数和千粒重对产量的贡献。保证周麦18号高产的适宜播期为10月8日～10月15日,播种密度范围较广(180万～330万株/hm2),早播适宜低密度,播期推迟,密度适当增加。Effects of different sowing dates on yield and yield components of Zhoumai 18 were studied under 1.8 million plants/hm2, 2.7 million plants/hm2 and 3.3 million plants/hm2 planting density condition. The results showed that effects of different sowing dates on yield were significantly difference under the same planting density conditions. The effect of different planting density on yield under the same sowing date condition was not significant. However, the effect of sowing dates was significant on spike number and 1000-grain weight of Zhoumai 18, but not significant on grains per spike. The spike number was one of the key factors determining the yield of Zhoumai 18. Yield of Zhoumai 18 would reach to higher level under the sowing dates of Oct 8 to 15 and planting density of 1.8 million to 3.3 million plants/hm2.

关 键 词：周麦18号 播期 播种密度 多穗型 产量构成 

分 类 号：S512.1[农业科学—作物学]