达州市烟田杂草种类及群落数量分析  

Weed Species and Community Quantitative Analysis in Tobacco Fields of Dazhou

作　　者：周小刚[1] 杨兴有[2] 阳苇丽[2] 尹宏博[2] 周开绪[2] 何正川[2] 严占勇[2] 魏建钧 侯涛[2] 杨吉光[2] 赵浩宇[1] 

机构地区：[1]四川省农业科学院植物保护研究所/农业部西南作物有害生物综合治理重点实验室,四川成都610066 [2]四川省烟草公司达州市公司,四川达州635000

出　　处：《杂草学报》2016年第2期12-16,共5页Journal of Weed Science

基　　金：四川省烟草专卖局科技项目(编号:201302004)

摘　　要：采用杂草优势度七级目测法对四川省达州市烟田杂草的种类、危害程度和群落特点进行调查。结果表明,达州市烟田杂草共有36科127种,其中优势杂草为马唐和空心莲子草。根据草害综合指数进行聚类分析,杂草群落可分为马唐+尼泊尔蓼+空心莲子草+看麦娘+繁缕+酸模叶蓼+辣蓼和马唐+空心莲子草+铁苋菜+光头稗+无芒稗+牛筋草2个聚类群。主成分分析结果表明,第Ⅱ聚类群的各杂草种在群落中的分布更集中,且优势杂草间相关性更高。Weed species,harm degree and distribution characteristics in tobacco fields in Dazhou were determined by a seven-point scale through weed dominance.The results showed that a total of 127 weeds belonging to 36 families were the dominant flora—Digitaria sanguinalis and Alternanthera philoxeroides.Hierarchical cluster analysis implied that weed community could be divided into two groups—D.sanguinalis＋Polygonum nepalense＋A.philoxeroides＋Alopecurus ae-qualis＋Stellaria media＋P.lapathifolium＋P.flaccidum and D.sanguinalis＋A.philoxeroides＋Acalypha australis＋Echinochloa colonum＋E.crusgalli ＋Eleusine indica based on the weed composite indexes.According to the principal component analysis,the correlation of dominant weeds in group II groupeding weeds was higher than that that in groupⅠ.

关 键 词：烟田 杂草群落 聚类分析 主成分分析 

分 类 号：S451.1[农业科学—植物保护]