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《Journal of Anhui Agricultural Sciences》 2008-15
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Analysis of the Chemical Properties of Different Degraded Grassland in Sanjiangyuan Region

ZHANG Jing et al(College of Agriculture and Animal Husbandry,Qinghai University,Xining,Qinghai 810003)  
[Objective] The research aimed to provide the theoretical basis for controlling the grassland degradation and recovering the growth of vegetation.[Method] Through analyzing the chemical prosperities of grassland with different degradation degree in Guoluo area and Yushu area of Sanjiangyuan,the changes of nutrient content in the soil of the degraded grassland in this region was understood.[Result] The average contents of available N,available P,available K,available Zn and organic matter in the soil of grassland with different degradation degree had an extremely significant difference(P0.01.With the increasing of the degradation degree and the deepening of soil layer,their contents were gradually decreased.The average content of available Cu had an extremely significant difference(P0.01).The content of available Zn had no obvious change law,with the change range of 1.36~3.08 mg/kg.With the deepening of soil layer,the content of available Cu was increased and the content of available Zn was decreased.The succession degree and the nutrient content in the soil of grassland with different degradation degree had no obvious change law.[Conclusion] According to the nutrient contents in the soil of the degraded grassland,the different fertilizers should be supplemented in the control process.
【Fund】: 国家自然科学基金项目资助(30760160)
【CateGory Index】: S812
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