播期和密度对白银沿黄灌区冬小麦产量的影响  

Effect of Sowing Date and Density on Winter Wheat Yield in Baiyin Irrigation Area Along Yellow River

作　　者：俞华林[1] 杨继忠[1] 郑彩霞[1] 赵宝勰[1] 师学豪 YU Hualin;YANG Jizhong;ZHENG Caixia;ZHAO Baoxie;SHI Xuehao(Baiyin Institdue of Agricultural Sciences,Baiyin Gansu 730900,China)

机构地区：[1]白银市农业科学研究所,甘肃白银730900

出　　处：《甘肃农业科技》2021年第6期18-23,共6页Gansu Agricultural Science and Technology

基　　金：甘肃省现代农业科技支撑体系区域创新中心重点科技项目(2020GAAS04);白银市科技计划项目(2016-2-26N)。

摘　　要：采用饱和D最优设计,在白银沿黄灌区试验分析了播期与密度对冬小麦产量的影响。结果表明,随着播期的推迟,小麦产量降低;在一定范围内,通过增加密度可以提高小麦成穗数,进而达到提高产量的目的。小麦产量在6300 kg/hm^(2)以上时,95%的置信区间播期为-0.8559~0.0547,密度为-0.2754~0.6728,相应的播期在9月17日至9月29日、密度为231.52~338.19 kg/h时增产效果为佳。The effects of sowing date and density on winter wheat yield were analyzed by saturated D optimal design in Baiyin Irrigation Area Along Yellow River.The results showed that wheat yield decreased with the delay of sowing date.In a certain range,the number of panicles can be increased by increasing the density,and then the yield can be increased.When wheat yield was above 6300 kg/hm^(2),the sowing date of 95%confidence interval was-0.8559~0.0547,and the density was-0.2754~0.6728.The corresponding sowing date was September 17 solstice on September 29,and the density was 231.52~338.19 kg/hm^(2),which yield increase effect was best.

关 键 词：冬小麦 播期 密度 产量 饱和D最优设计 

分 类 号：S512.1[农业科学—作物学]