摘要
研究5种牧草对入侵杂草胜红蓟的替代控制效果,为入侵杂草胜红蓟的防控提供参考依据。在田间条件下,通过分别将5种牧草(‘特高’、‘大力士’、‘多年生黑麦草’、‘白三叶’、‘杂交狼尾草’)与胜红蓟约2:1的比例混播,建立了5种不同的替代控制模式,然后动态监测各群落(种群)生物指标,评价5种牧草对入侵杂草胜红蓟的替代控制效果。结果表明:(1)以‘特高’对胜红蓟进行替代控制时,‘特高’株高不受阻、盖度占优、群落Simpson指数和Shannon-wiener指数变大,胜红蓟重要值变小;(2)以‘多年生黑麦草’对胜红蓟进行替代控制时,‘多年生黑麦草’株高不受阻、盖度占优、群落Simpson指数变大、Shannon-wiener指数变小,胜红蓟重要值变小;(3)分别以牧草‘白三叶’、‘大力士’、‘杂交狼尾草’对胜红蓟进行替代控制时,虽然牧草盖度占优,群落Simpson指数变大,但是牧草高度受阻、群落Shannon-wiener指数变小,胜红蓟重要值变大。综上结果说明牧草‘特高’和‘多年生黑麦草’对胜红蓟有很好的防控效果,而‘白三叶’、‘大力士’、‘杂交狼尾草’对胜红蓟替代控制的效果欠佳。
Study the replacement control effect on invasive weed Ageratum conyzoides with five pasture species in order to provide prevention and control reference for Ageratum conyzoides. A replacement field experiment was conducted to evaluate the restoring effect of the field invaded by Ageratum conyzoides. In this study, five replacement control modles, which were formed by five pasture species （Lolium multiflommLam L., Sorghum bicolor Moench, Lolium perenne L., Trifolium repens, Pennisetum americanum） that were mixed grown with target plant Ageratum conyzoides respectively with the proportions of about 2：1. Then monitored the plants population and community indexes on set date for evaluating the replacement control effect on invasive weed Ageratum conyzoides resulting from five pasture species. The replacement field experiment results showed that for Lolium multiflorumlam L., the plant height was not obstructed, coverage was dominant, community Simpson index and Shannon-wiener index turned larger, and the important value of Ageratum-conyzoides turned smaller. For Lolium perenne L., all of the community index value was similar to the Lolium-multitlorumLam L. except Shannon-wienerindex. For Sorghum bicolor Moench, Trifolium repens and Pennisetum americanum, in spite of coverage was dominant,and community Simpson index turned larger, out the plant nelgm was obstructed, the Shannon-wiener indexturned smaller, and the important value of Ageratum conyzoides turned larger, l ne aoove aescnpuon indicated Lolium-rnultflorumLam L. and Lolium perenne L. could effectively control Ageratum conyzoides, but Sorghum bicolor Moench, Trifolium repens and Pennisetum americanum had almost no effect in preventing and controlling Ageratum conyzoides in replacement field experiment.
出处
《中国农学通报》
CSCD
2012年第35期13-18,共6页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金"从入侵杂草化感武器的破解途径入手研究外来杂草入侵系统的恢复途径及其机理"(30860066)
海南师范大学海南热带动植物生态学海南省重点实验室开放基金"化感与竞争对假臭草成功入侵的影响"(HNSF-PE-201101)
关键词
牧草
胜红蓟
替代控制
pasture
Ageratum conyzoides
replacement control
