Survey and Evaluation of Soil Nutrients in the Apple Production Regions in Weibei Highland

Determination of soil nutrients in the apple production regions of Weibei highland will provide fundamental reference for the scientific management and sustainable development of the apple industry in future.Soil samples were collected from Yan'an,Weinan,Tongchuan,Xianyang and Baoji areas in Weibei highland where high-quality apple planted.The ages of apple trees in the orchards were from 9 to 15 years and the soil organic matter,total N,total P,available N,P,K and available Fe,Mn,Cu and Zn were determined.The result showed that there was a significant difference in soil nutrients between the orchards in Weibei highland.The content of total N was in the deficient level,the contents of soil organic matter,available N,available Fe,available Mn and available Zn were at the bottom of suitable range in Yan'an area;the content of available Mn was at the bottom of suitable range in Tongchuan area;the contents of available Fe and available Mn were at the bottom of suitable range in Weinai and Xianyang areas;the contents of soil nutrient were more and then the suitable range in Baoji area.So some measures should be also taken to improve soil organic matter and available trace elements content,especially mixed use of organic manure and inorganic fertilizer,besides complementing elements which were scarce in different areas in future.