摘要
为有效控制杂草提供有益的参考,在此对不同遮荫条件下南方常见的几种杂草的生态位宽度和生态位重叠进行测定。结果表明生态位较宽的为竹叶草Oplismenus compositus(0.68)、弓果黍Cvrtococcum patens(0.41)、白茅Cymbopogon caesius(0.42)、双穗雀稗Panicum longifolium(0.40);生态位重叠值较大的有竹叶草与弓果黍(0.52),双穗雀稗与竹叶草(0.29),白茅与狗尾草Pennisetum alopecuroides(0.24),白茅与竹叶草(0.35),小野艾Artemisia indica与白茅(0.25),双穗雀稗与狗尾草(0.24),双穗雀稗与白茅(0.28),在不同的遮荫梯度水平上,杂草的种类及其生态位宽度有明显的分化,杂草间的生态位重叠亦有很大不同。
Basing on investigation on fields in Yanshan,Guilin,6 samples under different cover conditions were surveyed. 28 species of main weeds were recorded and analyzed. The species niche breadth and niche overlap were then calculated. The result shows that Oplismenus compositus (0. 68), Cyrtococcum patens, (0. 41),Cymbopogon caesius(0. 42) ,Panicum longifolium(0. 40) have bigger niche breadth as compared with other species. They are the important weed in this area. However,the niche overlap was higher between Oplismenus compositus and Panicum longifolium (0. 29) ,Cymbopogon caesius and Pennisetum alop-ecuroides (0. 24) ,Cymbopogon caesius and Oplismenus compositus(0. 35) ,Artemisia indica and Cymbopogon caesius(0. 25),Panicum longifolium and Pennisetum alopecuroides(0. 24),Panicum longifolium and Cymbopogon caesius(0. 28).
出处
《广西师范大学学报（自然科学版）》
CAS
2003年第4期96-99,共4页
Journal of Guangxi Normal University:Natural Science Edition
