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Nitrification potentials of Chinese tea orchard soils and their adjacent wasteland and forest soils

查看全文 作　　者：XUE [1,2]Dong;GAO [1]Yangmei;YAO [1]Huaiying;HUANG [1]Changyong 高影响力作者 机构地区：[1]Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, College of Environmental and Resource Sciences, Zhejiang University (Huajiachi Campus), Hangzhou 310029, China.;[2]Department of Environmental and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2009年第21卷第9期,共5页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(No.30671207,30871600);Zhejiang Provincial National Natural Science Foundation of China(No.Y5080067);the Doctoral Scientific Research Foundation of Luoyang Institute of Science and Technology(No.2008BZ04) 摘　　要：To investigate the nitrifying activities of different soil types,soil samples collected from 8-,50-and 90-year old tea orchards,the adjacent wasteland,and 90-year old forest were measured for their nitrification potentials using the conventional soil incubation and the liquid incubation method.Among different soil types,the nitrification potential of soil in tea orchards was higher than that of wasteland and forest soils.The slurry shaken liquid incubation method was confirmed to be more accurate and have reliable results than the soil incubation.Interestingly,experimental result revealed that the generally applied pH value of 7.2 for the liquid media was not the optimal pH for these acid soils with a strong buffer capacity.This suggested that tea orchard soils may have nitrifiers requiring pH-neutral condition for the best activity.Our data also showed that treatment with the commonly used nitrogen fertilizer urea significantly improved nitrification potential of the soils;such enhancement effect was stronger on all of three tea orchard soils than on wasteland and forest soils,and also stronger on the younger(8-and 50-year old) tea orchard soils than on the older one(90-year old) . 关 键 词：土壤硝化作用 森林土壤 茶园土壤 荒地 潜力 液体培养法 中国 土壤类型
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