外来入侵杂草假高粱的化感潜力  

Allelopathic potential of invasive alien weed Sorghum halepense(L.) Pers

作　　者：黄红娟[1] 张朝贤[1] 孟庆会[1] 魏守辉[1] 刘延[1] 崔海兰[1] 

机构地区：[1]中国农业科学院植物保护研究所,北京100094

出　　处：《生态学杂志》2008年第7期1234-1237,共4页Chinese Journal of Ecology

基　　金：国家"十一五"科技支撑重大资助项目(2006BAD08A09)

摘　　要：利用种子萌发和幼苗生长的生测方法研究了假高粱(Sorghum halepense(L.)Pers.)对3种农作物小麦、玉米和棉花的化感潜力,并进行化感作用的评价。结果表明:假高粱能够抑制作物种子萌发和幼苗生长,其化感作用强度随浓度升高而增强,随时间而降低;其中对小麦种子萌发率在第3天时0.1 g.ml-1浓度下抑制强度达40.4%,第20天时相同浓度下已经丧失化感活性;第3天和第10天时对作物幼苗生长有抑制作用,第20天时对3种作物幼苗生长均无影响;假高粱的化感潜力可能是其成功入侵的原因之一。The allelopathic potential of invasive alien weed Sorghum halepense（ L. ） Pers. （Johnsongrass） to wheat, maize and cotton was investigated by the laboratory tests of seed germination and seedling growth. The results demonstrated that S. halepense could inhibit the seed germination and seedling growth of the three crops. The allelopathic potential of S. halepense increased with its concentration, but decreased with time. At 0.1 g ·ml^-1 of S. halepense, the seed germi- nation rate of wheat was decreased from 40.4% on the 3rd day to zero on the 20th day, and the seedling growth of the three crops was inhibited on the 3rd or 10th day but not affected on the 20th day. The allelopathic potential of S. halepense could be one of the reasons of its successful invasion.

关 键 词：假高梁 化感作用 外来入侵种 

分 类 号：S451[农业科学—植物保护]