加拿大一枝黄花入侵对土壤酶活性的影响研究  

Effects of Solidago canadensis invasion on soil enzyme activities

作　　者：王锦文[1] 王君丽[2] 王江[1] 李伟华[3] 张崇邦[1] 

机构地区：[1]浙江省台州学院生命科学学院,浙江临海317000 [2]青岛农业大学资源与环境学院,山东青岛266109 [3]华南师范大学生命科学学院,广东广州510631

出　　处：《植物营养与肥料学报》2011年第1期117-123,共7页Journal of Plant Nutrition and Fertilizers

基　　金：浙江省自然科学基金项目(Y507049)资助

摘　　要：为探讨加拿大一枝黄花(Solidago canadensis L.)的入侵机理,在入侵重灾区之一的浙江省选择了5个野外区域,每个区域分别确立了4个入侵梯度(1个未入侵对照,3个不同入侵密度梯度,分别简写为Ecot1、Ecot2和Ex-ot),分析了9种分别与土壤碳、氮和磷转化有关的酶活性。结果表明,与未入侵土壤相比,入侵土壤中脱氢酶、β-葡萄糖苷酶、转化酶、脲酶和碱性磷酸酶活性稍有提高;土壤蛋白酶活性却随着加拿大一枝黄花入侵密度的增加有所下降,但统计结果均不显著。土壤硝酸还原酶和酸性磷酸酶活性却随着加拿大一枝黄花的入侵显著性提高,而纤维素酶活性却显著下降。主成分分析(PCA)表明,土壤酶活性的总体变化可将4个入侵梯度分为3组,即:未入侵组、Ecot1-Ecot2组和加拿大一枝黄花单优群落组(Exot);冗余分析(RDA)揭示出加拿大一枝黄花入侵与土壤理化因素之间的相互作用对土壤酶活性的影响较大。As Solidago canadensis imposes great threats to native ecosystems in some areas of China,it has important ecological value to study invasive mechanism of S.canadensis.We selected five field areas in Zhejiang province,one of zones invaded heavily by S.canadensis in China.In each area,four invasive gradients were established according to the invasive density[including one control un-invaded by S.Canadensis（Nat）,and three gradients with different invasive densities（Ecot1,Ecot2 and Exot）].Nine soil enzyme activities,associated individually with soil carbon,nitrogen and phosphorus cycling,were analyzed.The results show that compared with the soil un-invaded by S.canadensis,the activities of dehydrogenase,β-glucosidase,invertase,urease and alkaline phosphatase are slightly increased,but are not statistically significant（p0.05）.Inversely,the proteinase activity is slightly decreased,but is not statistically significant either（P0.05）.Different from those enzymes mentioned above,both nitrate reductase and acid phosphatase activities are significantly increased with S.canadensis invasion（P 0.05）,while the cellulase activity is significantly decreased（P0.05）.The principal components analysis indicates that the aggregated shift of soil enzyme activities can be classified as three groups,such as the group un-invaded by S.canadensis,the Ecot1-Ecot2 group,and the Exot group covered only by S.canadensis.Redundancy analysis reveals that changes in soil enzyme activities are largely determined by interactions of S.canadensis invasion with soil physico-chemical properties.

关 键 词：植物入侵 加拿大一枝黄花 土壤 酶活性 

分 类 号：S451[农业科学—植物保护]