怒江干热河谷区潞江坝木薯地杂草种类调查研究

Investigation and Research of Weeds Problems in Lujiangba Cassava Fields in Yunnan Dry-hot Area Valley

对怒江干热河谷区潞江坝木薯地杂草种类组成、生长型和生态习性进行调查。结果表明,该木薯地主要杂草有19科48种,其中,外来入侵杂草有9科17种。对木薯地杂草的田间均度、田间密度、田间频率和相对多度分析结果得出,木薯地主要杂草为马齿苋(Portulaca oleracea L.)、龙葵(Solanum nigrum L.)、赛葵[Malvastrum coromandelianum(L.)Gurcke]、胜红蓟(Ageratum conyzoides L.)和香附子(Cyperus rotundus),相对多度分别为30.84%、25.22%、22.41%、19.25%和18.19%,研究结果为重要经济作物木薯田间杂草控制提供科学依据。

Investigation was conducted in Lujiangba Cassava Fields in Yunnan Dry-Hot Area Valley. The results showed that 19 families and48 species of weeds remarked in cassava field. Among them,alien invasive weed had 9 familes and 17 species,among which the dominant weeds were Portulaca oleracea L.,Solanum nigrum L.,Malvastrum coromandelianum（ L.） Gurcke,Ageratum conyzoides L. and Cyperus rotundus with 30. 84 %,25. 22 %,22. 41 %,19. 25 % and 18. 19 % relative abundance,respectively by field all degrees,field density,field frequency and relatively abundance in cassava field. The study could provide scientific basis for weeds control in cassava fields.