胜红蓟对大豆生长和产量的影响

Effect of Ageratum conyzoides L. on Growth and Yield of Soybean [Glycine max(L.) Merrill.]

外来入侵杂草胜红蓟已由南向北入侵到我国长江流域,对众多作物构成威胁。大豆是长江流域重要的作物之一。通过田间小区试验,测定胜红蓟不同密度和不同除草时间对大豆生长和产量的影响。结果表明,各处理胜红蓟对大豆的株高、叶片数和产量没有显著的影响。这说明大豆(台湾毛豆75号)品种对胜红蓟具有较强的竞争力和化感作用。

Ageratum conyzoides L., an invasive alien weed, has invaded northwards from South China to the Changjiang River Basin and threatened many crops there. Soybean [Glycine max （L.） Merrill.] is one of important crops in the Changjiang River Basin. The effect of different densities ofA. conyzoides and its weeding time on the growth and yield of soybean was determined in the field plot trial. The results showed that there was no significant difference among the treatments in height, leaf number and yield of soybean. This indicates that soybean （Taiwan 75） may have strong competition and allelopathy against A. conyzoides.