摘要
[目的]为了研究黑土区不同土地利用类型方式下土壤酶活性的变化特征。[方法]以典型黑土区不同土地利用类型(天然林、杨树人工林、草地及耕地)土壤为研究对象,测定和分析土壤过氧化氢酶、多酚氧化酶、碱性磷酸酶活性等指标。[结果]黑土区不同土地利用类型对土壤养分含量和酶活性的影响各不相同。与耕地相比,林地、草地表层土壤水解氮、有机质的含量增加,而硝态氮、铵态氮、有效磷的含量降低。草地土壤过氧化氢酶、脱氢酶、多酚氧化酶、脲酶及碱性磷酸酶活性降低;林地脱氢酶、脲酶及碱性磷酸酶活性降低。相关性表明,不同土地利用类型土壤养分含量与酶活性具有较高的相关性。[结论]林地与草地有利于土壤酶活性及土壤养分的累积,可为探讨黑土质量的演变规律提供理论依据,同时为植被恢复效果评价提供参考。
[Objective] The research aimed to study the variation of soil enzyme activities in black soil zone under different land use types.[Method] The soils from different land use types （natural forests,poplar plantations,grassland and arable soil） in black soil zone were taken as the examining objects.Soil catalase,polyphenol oxidase,alkaline phosphatase activity and other indicators were measured and analyzed.[Result] Different land use types in black soil showed different influences between nutrient content and enzyme activity.Compared with farnland,the topsoil hydrolysis nitrogen content and organic matter content in woodland and grassland were increased,while nitrate,ammonium nitrogen,and phosphorus content were reduced.The activity of soil catalase,dehydrogenase,polyphenol oxidase,urease and alkaline phosphatase decreased in grassland.And the activity of soil dehydrogenase,urease and alkaline phosphatase were reduced in woodland.The correlation indicated that there was higher correlation between soil nutrient content and soil enzyme activity.[Conclusion] Woodland and grassland made conducive to soil enzyme activities and the accumulation of soil nutrient.The results could provide the basis for the study of the evolution of black soil quality,and the evaluation of vegetation restoration.
出处
《安徽农业科学》
CAS
2013年第30期12003-12004,12020,共3页
Journal of Anhui Agricultural Sciences
关键词
黑土区
土地利用类型
土壤养分
土壤酶活性
Black soil
Different land use
Soil nutriention
Soil enzyme activity
