草业学报2011，Vol.20Issue(1)：15-21,7.
不同耕作方式对冬小麦田杂草群落的影响
Effects of different tillages on weed communities in winter wheat fields
摘要
Abstract
The effects of rotary tillage with no stubble (RT), rotary tillage with straw incorporation (RTS),no-till without stubble (NT), no-till with 6 000 kg/ha (NTS6000), and no-till with 3 000 kg/ha (NTS3000), on weed communities structure and species diversity was studied in field experiments using a community ecology method. Compared with RT, the NT, NTS3000, and NTS6000 treatments increased perennial weed species, but there was no significant difference in the species richness. NT, NTS3000 and NTS6000 significantly reduced the summed dominance ratio (SDR) of Lithospermu arvense, but increased the SDR of Capsella bursa-pastoris.RTS significantly reduced the SDR of L. arvense, but increased the SDR of Descurainia sophia. The species diversity of weed communities varied significantly between different tillage systems. The Bray-Curtis index and hierarchical cluster analysis classified the weed communities of different tillage systems into two categories:Category I (NT, NTS6000 and NTS3000) where no-till was implemented, and category Ⅱ (RTS and RT) where rotary tillage was implemented. The species richness of category I was a little larger than that of category Ⅱ ,but the species diversity and community evenness were much larger than those of category Ⅱ. However, the community dominance of category I was significantly smaller than that of category Ⅱ .关键词
耕作方式/冬小麦/杂草群落/物种多样性Key words
tillage/ winter wheat/ weed community/ species diversity分类
农业科技引用本文复制引用
高宗军,李美,高兴祥,郭晓,孙廷林,赵维..不同耕作方式对冬小麦田杂草群落的影响[J].草业学报,2011,20(1):15-21,7.基金项目
国家"十一五"科技支持重大资助项目(2006BAD08A09)和山东省自然科学基金项目(Y2007D67)资助. （2006BAD08A09）
