Study on the comprehensive evaluation of the ecological service function of apple orchard in the Residual Gully Regions of Loess Plateau
To evaluate the comprehensive service status of typical forest and fruit economic forest ecosystem services in the Residual Gully Regions of Loess Plateau,the apple orchard in Yongshou County,Shaanxi Province was studied by using expert consultation,frequency analysis and other methods to construct an evaluation system of 17 ecological service indicators including 10 aspects of water conservation and erosion resistance,as well as the application of analytic hierarchy process and fuzzy evaluation method.The comprehensive evaluation model of ecosystem services was used comprehensively to evaluate the ecosystem service functions of apple orchards.The results of the evaluation indicated that the weight of ecological function,living function and production function were 0.6753,0.0715 and 0.2532,respectively.The ecological function and production function were the main factors that influenced the status of ecological system service functions in the apple orchard.The degree of membership evaluation matrix showed that the amount of forest irrigation,soil erosion intensity,Shannon-Wiener index and apple production were the main factors affecting the ecological function and service status of the orchard.The overall evaluation index of the ecological system service function status of the apple plantations in Residual Gully Region was 0.5535,which was considered as Grade Ⅲ.The main reason was due to the anthropogenic interference that led to the excessive fertilizers.Irrational management resulted in low soil nutrients and low root soil moisture.The single negative ion concentration of the sand structure was low.As a result,the evaluation value of membership was low.This study provided data for ecological service function evaluation and sustainable utilization of orchards-apple economic plantation in the Residual Gully Region of Loess Plateau.
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