中国生态农业学报2011，Vol.19Issue(6)：1365-1371,7.DOI:10.3724/SP.J.1011.2011.01365
紫茎泽兰和黄顶菊入侵对土壤微生物群落结构和旱稻生长的影响
Effect ofAgeratina adenophora (Spreng.) and Flaveria bidentis (Linn.) invasion on soil microbial community and Oryza sativa L.growth
摘要
Abstract
This study analyzed the differences in soil micro-ecology between alien invasive weeds and local plants to understand impacts of alien invasive plant on soil ecosystem. Two invasive plant species [perennial Ageratina adenophora (Sprengel) and annual Flaveria bidentis plants] and two native plant species (Digitaria sanguinalis and Salsola collina) were planted in a common garden, in which the same soil from a non-invaded farmland was used to eliminate the effect of different soil minerals on the variations in the four plant species. Then a greenhouse experiment was conducted to verify any effects of rhizospheric soil microbial communities of two invasive plants on the performance of native plants. In the field experiment, soil nutrient, soil microbial community after three months of plants growth were examined. Based on the common garden experiment, differences were noted in the effects of invasive and native plants on soil micro-ecology. A. adenophora drastically increased soil available N (39.80 mg·kg-1), P (48.52 mg·kg-1) and K. In particular, PLFA (phospholipids fatty acids) fingerprint spectrum suggested a higher increase in actinomycete contend in the exotic plants soils than in the native plants soils. The increase in bacteria and fungi count was highest in A. adenophora invading soils. Pot feedback experiment showed that alien weed invaded soils inhibited the growth of Oryza sativa. O. sativa plant height increased by 113% and 17% in sterilized F. bidentis and A. adenophora invaded soils compared with no-sterilized soils, respectively. The above results suggested that F. bidentis and A. adenophora destroyed micro-habitats of invaded soils and created new micro-ecology environment suitable for the growth of invasive plants by altering soil microbial communities.关键词
外来入侵植物/紫茎泽兰/黄顶菊/土壤微生物/反馈作用/微生态/微生物群落结构Key words
Alien invasive plant/ Ageratina adenophora/ Flaveria bidentis/ Soil microorganism/ Feedback effect/ Mi-分类
植物保护学引用本文复制引用
李会娜,刘万学,万方浩..紫茎泽兰和黄顶菊入侵对土壤微生物群落结构和旱稻生长的影响[J].中国生态农业学报,2011,19(6):1365-1371,7.基金项目
国家重点基础研究发展计划(973计划)项目(2009CB119200)和国家自然科学基金项目(30871654)资助 （973计划）
