植物营养与肥料学报2011,17(1)：117-123 Plant Nutrition and Fertilizer Science
加拿大一枝黄花入侵对土壤酶活性的影响研究
王锦文"，王君丽”，王江'，李伟华3，张崇邦·
（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）
摘要：为探讨加拿大一枝黄花（SolidagocanadensisL.）的人侵机理，在人侵重灾区之一的渐江省选择了5个野外区域，每个区域分别确立了4个人侵梯度（1个未入侵对照，3个不同人侵密度梯度，分别简写为Ecot1、Ecot2和Ex-ot)，分析了9种分别与土壤碳、鼠和磷转化有关的酶活性。结果表明，与未人侵土壤相比，人侵土壤中脱氨酶、β-葡静糖苷酵、转化酶、脉酶和碱性确酸酶活性稍有提高；土填蛋白酵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人侵显著性提高，而纤维素酶活性却显荠下降。主成分分析(PCA)表明，土壤酶活性的总体变化可将4个人侵梯度分为3组，即：未人侵组、Eeotl-Ecot2组和加拿大一枝黄花单优群落组（Exot)；允余分析（RDA）揭示出加拿大一枝黄花人侵与土壤理化因素之间的相互作用对土壤酵活性的影响较大。
关键词：植物入侵；加拿大一枝黄花；土壤；酶活性
中图分类号：Q948.12
文献标识码：A
文章编号：1008505X(2011)01-0117-07
Effectsof Solidagocanadensisinvasiononsoilenzymeactivities
WANG Jin-wen ", WANG Jun-li ", WANG Jiang', LI Wei-hua", ZHANG Chong-bang
(1 School of Life Sciences, Taizhou University, Linhai, Zhejiang 317000, China;
2ColleeoureandEiomntQingoiculturalUnieyQingohndng669Chi
3 College of Lijfe Sciences, South China Normal University, Guangzhou, Guangdong 510631, China)
Abstract: As Solidago canadensis imposes great threats to native ecosystems in some areas of China, it has impor tant ecological value to study invasive mechanism of S. canadensis. We selected five field areas in Zhejiang prov-ince, one of zones invaded heavily by S. canadensis in China. In each area, four invasive gradients were estab lished according to the invasive density[ including one control un-invaded by S. Canadensis ( Nat), and three gra-dients with different invasive densities ( Ecotl , Ecot2 and Exot) J. Nine soil enzyme activities, associated individu ally 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 phos-phatase are slightly increased, but are not statistically significant (p >0. 05). Inversely, the proteinase activity is slightly decreased, but is not statistically significant either (P > 0. 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 (P<0. 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 Ecotl Ecot2 group, and the Exot group covered only by S. canadensis. Redundan-cy analysis reveals that changes in soil enzyme activities are largely determined by interactions of S. canadensis in-vasion with soil physico-chemical properties.
Key words:plant invasion; Solidago canadensis; soil; enzyme activity
收稿日期：2010-05-04
接受日期：2010-07-30
基金项目：浙江省自然科学基金项月（Y507049）资助。
作奢简介：王锦文（1966一），女，实验师，主要从事梳物与土壤生态学研究。Tel；0576-89582667，E-mail；wangjinwen@tac.edu.cn
通讯作者Tel;057685285060，E-mail;lihacb@163.com
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