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《Chinese Journal of Soil Science》 2008-03
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Soil Enzymatic Activities under Different Tillages Practricess in Dryland

YANG Zhao-di,CAI Li-qun,ZHANG Ren-zhi,LI Ai-zong (College of Resources and Environmental Sciences,Gansu Agricultural University,Lanzhou 730070,China)  
Based on conservation tillage experiment in Dingxi,changes of soil enzymatic Activities were studied in four treatments.The results showed as follows :(1) No-tillage and straw cover could accelerate soil enzymatic activities,especially for the upper soil;2) Soil hydrolytic enzymatic activities distribution of different treatments were different.The distribution of soil hydrolytic activities in T(Conventional cultivation and no straw) and TS(Plough with straw incorporated) treatments reduced from the soil profile of 0~5cm to the soil profile of 5~10cm and increased from the soil profile of 5~10cm to the soil profile of 10~30cm,but reduced in NT(No-till without straw) and NTS(No-till with straw) treatments form the soil surface to the deep soil layers;(3)With the increase of soil depth soil Oxidation reduction enzymatic activities reduced.(4) The correlation coefficient among the soil enzymatic activities reached significant level.
【Fund】: ACIAR资助 项目编号:LWR2/1999/094;; 国家科技支撑计划 项目编号:2006BAD15B06
【CateGory Index】: S154
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