陕西白水县红富士苹果示范园土壤养分状况分析

为了查清渭北苹果主产区红富士果园土壤肥力状况,在大量调查研究的基础上,采集陕西白水34个示范果园的土壤样品,测定分析其土壤有机质、全氮、速效氮、有效磷、速效钾及有效微量元素含量。分析结果表明,白水红富士示范园的土壤有机质含量≤15 g.kg-1的占79%,低于国家绿色食品产地土壤肥力Ⅱ级指标,只有很少的一部分果园土壤有机质达到生产绿色果品标准;土壤全氮含量较高;有接近一半果园的土壤速效氮含量>50 mg.kg-1,处于适宜水平,其余果园速效氮含量均较低;土壤有效磷、速效钾的含量较高,可以满足苹果生产的需求;土壤有效态微量元素含量除铜以外,都很缺乏,生产中应重视补充。

Analysis on Soil Nutrient Availability of Fuji Apple Demonstration Orchards in Baishui County in Weibei Area of Shaanxi

In order to know the soil fertility situation of Fuji apple orchards in Weibei,on the basis of a great deal of research soil samples were collected from 34 demonstration apple orchards in Baishui county Shaanxi province.The content of soil organic matter,total N,available N,P,K and available micronutrients were determined.The results showed that the percentage of orchards with soil organic matter content less than 15 g·kg-1 was 79% in all demonstration Fuji apple orchards in Baishui,according the standard of soil fertility of green-food production area,only a small part of the orchard soil organic matter reached the target level Ⅱ;the soil total N content was relatively high;the percentage of orchards with available N content more than 50 mg·kg-1 was nearly half in all apple orchards,that is suitable for apple production,the content was relatively low in the rest orchards;the available P and K contents were rich,it can meet the needs of apple production;the soil available micronutrients content were all low except Cu,so farmers should pay more attention to application of micronutrients in production.