喀斯特退耕还林地土壤酶活性变化特征  

The Change Features of Soil Enzyme Activity of Forestland Converted from Cropland in Karst Area

作　　者：李翠莲[1] 戴全厚[1] 

机构地区：[1]贵州大学林学院,贵阳550025

出　　处：《湖北农业科学》2012年第22期5034-5037,共4页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(41061029);贵州省优秀青年科技人才培养计划项目(黔科合人字[2011]13号);国家"十二五"科技支撑计划项目(2011BAC02B02)

摘　　要：以贵州省六盘水市钟山区老鹰山镇不同年限退耕还林地为对象、石漠化未治理地为对照,分析探讨了坡耕地退耕还林后植被恢复过程中土壤脲酶、蔗糖酶、淀粉酶及理化性质的演变特征。结果表明,不同退耕还林模式对土壤酶活性的影响不同,土壤酶的差异性变化比较明显。相对于石漠化未治理地,自然松林及其他退耕还林模式的土壤脲酶活性都有一定的增加。不同退耕还林模式土壤蔗糖酶活性均高于石漠化未治理地,增幅为176.59%～741.37%。不同退耕还林模式土壤淀粉酶活性不同,对比石漠化未治理地,其他退耕还林地都有不同程度的提高或降低,但变化规律并不明显。通过相关分析可知,脲酶和蔗糖酶与碱解氮之间相关显著,脲酶和蔗糖酶与其他养分及淀粉酶与各养分因子之间相关不显著。Taking forestland with different ages in Laoying mountain,Zhongshan district,Liupanshui city,Guizhou province as research object,and taking rocky desertification land not been governanced as control,the influence of different reforestation model on soil enzyme activity such as urease,invertase and amylese was studied.The results indicated that the influence of different reforestation model on the soil enzyme activity was different and obvious.The soil urease activity of natural pine and other reforestation model was higher than that of the rocky desertification land.The activity of soil invertase in different reforestation mode increased by 176.59%～741.37% compared to the rocky desertification.However,the activity of soil amylase in different reforestation mode did not show the same change pattern and the variation was not obvious.The activities of urease and invertase had significant correlations with the content of available nitrogen but not with other nutrients content.Besides,the activity of soil amylase had no obvious correlation with all nutrients contents.

关 键 词：喀斯特地区 退耕还林地 土壤酶 土壤养分 变化特征 

分 类 号：S714.5[农业科学—林学]