冬枣树盘土壤养分和盐分含量梯度分布研究

Study on the Different Content of Soil Nutrient and Salt in a Winter Date Orchard

对离树干0-100cm半径的冬枣树盘表土层和20cm土层土壤养分和盐分含量进行了检测。结果表明：（1）表土层铵态氮含量先降后升,速效磷、速效钾含量先升后降;20cm土层铵态氮、速效磷含量先降后升,速效钾含量先升后降。（2）硫酸盐、氯化盐和重碳酸盐在表土层和20cm土层含量均表现先升后降的趋势。

The contents of soil nutrient and salt in surface layer soil and 20cm layer soil of a winter date orchard were analyzed.The results showed that the tree trunk distance which was range between 0cm and 100cm,in surface layer soil available N became lower then higher,available P and available K became higher then lower.in 20cm layer soil available N and available P became lower then higher,available K became higher then lower.in surface layer soil and 20cm layer soil the sulphate content,chlorinate content,carbonate content were all become higher then lower.