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《Journal of Anhui Agricultural Sciences》 2008-27
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Evaluation of Fertility and Nutrient in Farmland Soil from Tibetan Plateau Green Agriculture

HAN Mei et al(Institute of Soil and Fertilizer,Qinghai Academy of Agricultural and Forestry Sciences,Xining,Qinghai 810016)  
[Objective] The aim was to understand the change trend of farmland soil nutrient from Tibetan plateau green agriculture.[Method]The farmland soils from green agriculture of Huangzhong Country and Huangyuan Country in Qinghai Province were sampled to detect their pH value,contents of organic matter,available N,available P,available K and evaluated with reference to 6 grade standard of farmland soil nutrient of Qinghai Province.[Result]The soil organic matter content in Huangzhong Country and Huangyuan Country differed little and they were all graded 3 according to the nutrient standard;their available N content was basically equal and they all belonged to 3 grade according to the nutrient standard;their available P content all had large variation and that in Huangyuan Country had larger variation,they all belonged to 2 grade according to the nutrient standard;their available K content was above or close to 200 mg/kg.[Conclusion] The pH value of farmland soil from Tibetan plateau green agriculture was between 7.62 and 8.69,the contents of organic matter,available N,available P all belonged to middle-fertility level and the available K content reached to the demand of 1 grade high-fertility soil basically.
【Fund】: 基金项目:绿色农业科学研究与示范(2007-6)
【CateGory Index】: S158
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