外来入侵植物紫茎泽兰对土壤养分的影响  

Effects of Alien Invasive Plant Eupatorium adenophorum on Soil Nutrients.

作　　者：吴天马[1] 丁晖[2] 刘志磊[3] 徐海根[2] 卞新民[1] 

机构地区：[1]南京农业大学农学院,江苏南京210095 [2]国家环境保护总局南京环境科学研究所,江苏南京210042 [3]南京师范大学生命科学学院,江苏南京210097

出　　处：《生态与农村环境学报》2007年第2期94-96,共3页Journal of Ecology and Rural Environment

基　　金：国家重点基础研究发展规划项目(2002CB111405)

摘　　要：选取云南、四川省3个不同生境作为样地,研究紫茎泽兰入侵对不同生态系统土壤中碱解氮、速效磷、速效钾含量的影响。结果表明,紫茎泽兰入侵造成样地a土壤碱解氮、速效磷、速效钾含量分别显著下降33.9%、44.2%和32.2%;样地b仅土壤速效磷显著下降31.0%;样地c土壤各营养元素未见显著变化。在不同时间,样地a处理组各营养元素含量基本低于对照组,以2005年7月至10月的差异最显著。这说明紫茎泽兰入侵对土壤养分的影响因生境不同而异,且与紫茎泽兰的生长节律有关。Three sample plots of different habitat were selected in Yunnan and Sichuan to study effects of invasion of Eupatorium adenophorum on content of available nitrogen, available phosphorus and available potassium in soil. Results show that available nitrogen, available phosphorus and available potassium decreased by 33.9% ,44.2%, and 32.2%, respectively, in Plot a; only available phosphorus did by 30.1% in Plot b; and no significant change was observed in Plot c. During the experiment, Plot a was found lower than the control in soil nutrient content, regardless of time period, and especially during the period from July to October of 2005, which suggests that the effect of the invasion of Eupatorium adenophorum varied from habitat to habitat, and was related to the growth rhythm of Eupatorium adenophorum.

关 键 词：外来入侵植物 紫茎泽兰 土壤养分 昆明 西昌 

分 类 号：X176[环境科学与工程—环境科学] S158[农业科学—土壤学]