中国农业科学2009，Vol.42Issue(11)：3964-3971,8.DOI:10.3864/j.issn.0578-1752.2009.11.025
紫茎泽兰入侵对土壤微生物、酶活性及肥力的影响
Invasive Impacts of Ageratina adenophora (Asteraceae) on the Changes of Microbial Community Structure, Enzyme Activity and Fertility in Soil Ecosystem
摘要
Abstract
[Objective] In present study, the structure of soil microbial community, activities of soil-enzyme and changes of fertility in different Ageratina adenophora invaded areas were analyzed for understanding the impacts of alien invasive plant on soil ecosystem. [Method] Soil samples were taken from different communities: heavily-invaded area, medium-invaded area, newly-invaded area, non-vegetation area, single-native-plant area, and multi-native-plants area, which are within similar ecological situations, soil biota were analyzed by traditional cultural methods, soil enzyme activities and fertilities were measured using the traditional chemical-factor analyzing methods. [Result] Compared to non-vegetation and native-plant soils, it was most noticeable that A. adenophora increased soil organic carbon, NO_3~-N, NH_4~+-N, available P, available K content and the activities of urase, phosphatase and invertase. NH4+-N content in the heavily-invaded soil was 53.00 mg·kg~(-1), which was 14.1, 9.9, and 5.9 times as that in the non-vegetation, multi-native-plants and single-native--plant soils, respectively. The activities of urase in the heavily-invaded soil was 2.87, which was 2.9 and 3.9 times more than that in the multi-native-plants and non-vegetation soils, respectively. The quantity of soil fungi, azotobacteria and ammonia oxidizing bacteria were most abundant in the heavily-invaded area. [Conclusion] The results indicate that A. adenophora changed soil microbial communities, especially the soil nutrition cycling and soil enzyme related soil microbe groups, probably creating a favorable soil environment which is of benefit to itself. The invasion-induced changes of soil microbial community and physical and chemical properties may be used by A. adenophora to expand rapidly in invasive ranges.关键词
生物入侵/紫茎泽兰/土壤酶活性/土壤肥力/土壤微生物Key words
biological invasion/Ageratina adenophora/activity of soil enzyme/soil fertility/soil microbial community分类
农业科技引用本文复制引用
李会娜,刘万学,戴莲,万方浩,曹远银..紫茎泽兰入侵对土壤微生物、酶活性及肥力的影响[J].中国农业科学,2009,42(11):3964-3971,8.基金项目
国家重点基础研究发展计划项目(2009CB119200)、国家自然科学基金项目(30871654)、"十一五"国家科技支撑计划课题(2006BAD08A17) （2009CB119200）
