黄花蒿对紫茎泽兰竞争效应的影响  

Influence of Artemisiaannuaon the competition effect of Eupatorium adenophorum

作　　者：孙娜娜[1] 谭永钦[1] 马洪菊[1] 周兴苗[1] 王永模[1] 

机构地区：[1]昆虫资源利用与害虫可持续治理湖北省重点实验室/华中农业大学植物科学技术学院,武汉430070

出　　处：《华中农业大学学报》2015年第1期38-44,共7页Journal of Huazhong Agricultural University

基　　金：国家公益性行业(农业)科研专项(201103027)

摘　　要：采用复合De Wit取代试验设计方法,分析入侵杂草紫茎泽兰(Eupatorium adenophorum)与本土植物黄花蒿(Artemisia annua)的竞争关系,观察不同种植密度和种植比例对紫茎泽兰生长特性的影响。结果表明:在紫茎泽兰和黄花蒿混种样地中,紫茎泽兰相对产量(RYg)和相对密度(RDg)均小于1;随着黄花蒿混种比例的增加,紫茎泽兰的RYg和RDg均逐渐减小,同时紫茎泽兰的茎宽、分枝数、生物量逐渐降低;紫茎泽兰与黄花蒿之间的竞争大于紫茎泽兰的种内竞争,黄花蒿的存在抑制了紫茎泽兰种群数量的扩增;在黄花蒿混种比例较高的情况下,随着种群密度的增加,紫茎泽兰的根冠比逐渐降低,同时紫茎泽兰的株高逐渐增加;紫茎泽兰能采取地上优先生长策略应对黄花蒿的强大竞争压力;在紫茎泽兰入侵早期利用黄花蒿进行替代控制,可获得较好的防治效果。The competition relation between Eupatorium adenophorum and Artemisia annua was studied by using the multiple De Wit replacement series design method,which discussed the effects of growing character of E.adenophorumin different planting densities and mixture proportions.The results showed that the relative yield（RYg）and the relative density（RDg）were less than 1in mixture sample area between E.adenophorum and A.annua;with the increase of the mixture proportion of A.annua,the RYg and RDg of E.adenophorum were gradually decreasing,and stem diameter,branch number and biomass were also decreasing,which implied that the competition between E.adenophorum and A.annua was severer than intraspecific competition of E.adenophorumand the population expansion of E.adenophorum was restrained when A.annua existed.With the increase of the population density under the circumstance of higher mixture proportion of A.annua,root/shoot radio of E.adenophorum had a trend of reduction,but plant height of E.adenophorumhad a trend of increase,which suggested that E.adenophorumhad to adopt the allocation of resources model,namely,the strategy of the ground priority growth in response to stronger pressure of competition of A.annua.Based on the above results,we should replace E.adenophorumwith A.annuaat the early stages of invasion to have a good effect on the control of E.adenophorum.

关 键 词：紫茎泽兰 黄花蒿 种植密度 竞争 

分 类 号：S451.1[农业科学—植物保护]