Analysis of Soil and Leaf Nutrients in Apple Orchards in The Loess Plateau——A Case Study of Huangling County, Shaanxi Province
In order to understand the apple orchard soil fertility in Loess Plateau,this paper took the Huangling county which is one of the high apple yield areas as a representative example,collected the soil and leaf samples in 304 apple orchards,detected and analyzed soil organic matter,total nitrogen,available nitrogen,pH,available phosphorus,available potassium,CEC,effective trace-elements and the total nitrogen,phosphorus,potassium,copper,zinc,iron and manganese in leaves,evaluated the apple orchard fertility according to the corresponding evaluating standards.The results showed that soil organic matter contents in 72％ of apple orchards was low.Nitrogen contents in soil and leaves were low while phosphorus and potassium contents were high.The need for fertilizers was in an order of Nitrogen＞Potassium,phosphorus.The content of trace elements were low.Increasing soil organic matter content can increase the contents of soil available nutrients.The correlation between soil nutrients and leaf nutrients were positive but potassium was negative,which suggests fertilization can improve leaf nutrients except the potassium.
国家科技期刊平台
NSTL
万方数据
维普
