几种优质牧草替代种植对紫茎泽兰的防控效果分析

摘要

5 high quality forages such as perennial Lolium perenne,Dactylis glomerata,Setaria anceps,Trifolium repens and edicago sativa were planted in the fields with invasive Eupatorium adenophorum to analyze their ecological adaptability and the control effect on Eupatorium adenophorum.The results showed that the 5 kinds forages could normally grow at the local land,the indexes,such as coverage,plant height,stem and leaf fresh weight of S.anceps were the highest,which showed very strong ecological adaptability as well as the best control effect on E.adenophorum,up to 97.85％ and 93.81％ at the first and second year,respectively,indicating good sustainable control effect.The D.glomerata ranked the second place,of which the coverage after one year was 86％ and the control efficacy on E.adenophorum was 89.68％.But the other species showed poor control effect on E.adenophorum because of slow growth rate and heavily damage from companion weeds even they could establish dominant communities.%在野外紫茎泽兰(Eupatorium adenophorum)入侵的荒地上建立多年生黑麦草(Lolium perenne)、鸭茅(Dactylis glomerata)、非洲狗尾草(Setaria anceps)、白三叶(Trifolium repens)、紫花苜蓿(Medicago sativa)等5种优质牧草种群,分析其生态适应性及对紫茎泽兰的防控效果.试验结果表明,几种牧草在当地都能正常生长,其中非洲狗尾草的覆盖度、株高、茎叶鲜重等指标均为最高,具有很强的生态适宜性,对紫茎泽兰的防控效果也最好,当年防效达97.85％,1年后防效达93.81％,具有很好的持续控制作用；其次是鸭茅,1年后覆盖度达86％,对紫茎泽兰的防控效果达89.68％;其他几种牧草虽然能够建立优势群落,但因生长速度较慢或受伴生杂草危害,对紫茎泽兰的防控效果较差.