麦田恶性杂草猪殃殃与冬小麦的竞争临界期研究  

Threshold Period of Competition of Worst Weed Catchweed(Galium aparine var.tenerum) with Winter Wheat in Fields

作　　者：李儒海[1] 褚世海[1] 魏守辉[2] 黄红娟[2] 张朝贤[2] 

机构地区：[1]湖北省农业科学院植保土肥研究所/农业部华中作物有害生物综合治理重点实验室/农作物重大病虫草害防控湖北省重点实验室,武汉430064 [2]中国农业科学院植物保护研究所,北京100094

出　　处：《湖北农业科学》2014年第24期6026-6029,共4页Hubei Agricultural Sciences

基　　金：公益性行业(农业)科研专项(201303022);湖北省农业科技创新中心资助项目(2014-620-003-003)

摘　　要：建立小麦苗后有或无猪殃殃（Galium aparine var．tenerum）天数与小麦产量损失率之间的函数关系．探讨湖北省小麦田恶性杂草猪殃殃与冬小麦的竞争临界期。结果表明，湖北省小麦田猪殃殃与冬小麦的竞争临界期为小麦苗后16—97d，即此时为防除猪殃殃的最佳时期，小麦处于3叶期至8-9叶期，为田间猪殃殃密度及生物量的快速增长期。在此竞争临界期内保持田间无草，能保证猪殃殃造成的小麦产量损失率低于3％。Functional relationships between the weedy or weed-free days and the yield loss rate of winter wheat were set up to study the threshold period of competition of worst weed catchweed （Galium aparine var. tenerum） with winter wheat in wheat fields in Hubei province. The results showed that the threshold period of competition of catchweed with winter wheat in fields was about 16 to 97 days after wheat emergence. This period was optimal to control catchweed, while the seedlings of winter wheat were at the 3rd-leaf stage and the 8th to 9th-leaf stage, respectively. In this period, rapid increase of density and biomass of catchweed occurred. Weed free during the threshold period of competition assured loss of wheat yield less than 3%.

关 键 词：猪殃殃(Galium aparine var.tenerum) 冬小麦 竞争临界期 湖北省 

分 类 号：S451.1[农业科学—植物保护] S181