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通过大量土壤样品分析 ,探讨洛川县苹果园土壤养分现状变化趋势。测定结果表明 ,速效氮含量有所下降 ,速效磷含量明显上升 ,速效钾含量普遍下降 ,缺钾面积不断扩大 ,土壤有机质含量略有提高。根据果园土壤肥力变化提出了 :“重钾、增氮、稳磷、补微”的施肥原则及增施有机肥 ,果园种草覆草 ,平衡施肥及改进施肥方法 ,提高肥料利用率等培肥措施。
Through analyzing a large number of soil samples, the trend of soil nutrient status in apple orchard in Luochuan County was discussed. The results showed that the content of available nitrogen decreased, the content of available phosphorus increased obviously, the content of available potassium decreased generally, the area of potassium increased continuously, and the content of soil organic matter increased slightly. According to the changes of soil fertility in the orchard, this paper put forward the fertilization principle of “increasing potassium, increasing nitrogen, stabilizing phosphorus and supplementing microelements” and fertilizing principles such as fertilizing organic fertilizer and grass orchard, balancing fertilization, improving fertilization method and improving fertilizer utilization rate Measures.