刺槐滇柏混交林及纯林土壤酶与养分相关性研究  

The Relationship Between Soil Enzyme Activity and Soil Nutrient in Pure and Mixed Plantations of Robinia pseudoacacia and Cupressus duclouxiana

作　　者：刘成刚[1] 吴永波[1] 薛建辉[1] 戎宇[1] 

机构地区：[1]南京林业大学,江苏省林业生态工程重点实验室,江苏南京210037

出　　处：《土壤通报》2012年第6期1427-1431,共5页Chinese Journal of Soil Science

基　　金：林业公益性行业科研专项“生境胁迫立地植被恢复与重建技术研究(201104002)”资助

摘　　要：以贵州喀斯特石漠化山地退耕林地:刺槐(Robinia pseudoacacia)纯林(RP)、滇柏(Cupressus duclouxiana)纯林(CD)、刺槐滇柏混交林(RC)及未造林地(CK)为研究对象,采用图1方法进行取样,探讨了5种土壤酶活性(脲酶、蔗糖酶、多酚氧化酶、过氧化氢酶及总磷酸酶)和土壤养分之间的关系。结果表明,不同类型退耕林地的土壤养分之间存在显著差异,RP和RC土壤养分含量相对较高。土壤酶活性特征与土壤养分特征呈相似变化趋势。与CK相比,RC中5种土壤酶活性分别提高了52.1%、15.0%、30.9%、7.3%及27.9%。统计分析结果表明,土壤有机质和N是影响土壤酶活性的主要因子,K素可能是影响某些酶活性的限制因子。退耕还林措施明显改善了林地土壤质量,其中RP和RC的效果较好。We analyzed the relationship between soil enzyme activities（including urease,invertase,polyphenoloxidase,catalase and total phosphatase activity） and soil nutrients in four sites of Puding County,Guizhou Province： Robinia pseudoacacia plantation（RP）,Cupressus duclouxiana plantation（CD）,R.pseudoacacia-C.duclouxiana mixed plantations（RC） and a non-plantation area（CK）.The results showed that there were significant differences of soil nutrients among four sites,and relative high contents were in RP and RC,respectively.Similar changes were showed in soil enzyme activities and soil nutrients.Compared with CK,five soil enzyme activities in RC increased 52.1%,15.0%,30.9%,7.3% and 27.9%,respectively.The statistical analysis showed that the main factors affecting soil enzyme activities were soil organic matter and N,and K might be a limiting factor to certain enzyme.In general,all three types of plantations,especially for RP and RC,could improve soil quality after conversion of farmland to forest.

关 键 词：退耕还林 喀斯特 土壤酶活性 土壤养分 

分 类 号：S147.2[农业科学—肥料学]