宁蒗县土壤主要肥力指标的分析与评价

为了指导云南省宁蒗县的农业生产实践，通过对云南省宁蒗县的201个土壤样品进行含量测定和统计分析，分析与评价宁蒗县土壤的酸碱度状况和主要肥力指标。结果表明：宁蒗县土壤pH平均值为6.77，土壤有机质、土壤全氮、碱解氮、速效磷、速效钾和缓效钾的平均含量分别为12.51 g/kg，0.93 g/kg，93.83 mg/kg，25.19 mg/kg，43.86 mg/kg，157.28 mg/kg。大部分土壤pH近中性偏酸，速效磷总体含量处于较高水平，全氮和碱解氮含量总体处于中等水平，而有机质、速效钾和缓效钾含量水平偏低。各种营养元素的变异程度由小到大依次为土壤速效钾、缓效钾、有机质、碱解氮、全氮、速效磷。为此初步提出了调控土壤酸碱性，稳定土壤氮磷、适当增施有机肥、钾肥的施肥建议。

Analysis and Evaluation of Main Fertility Index of Ninglang County

This article analyzed and evaluated the situation of soil pH and main fertility index in Ninglang County of Yunnan Province by determining and analyzing the 201 soil samples, in order to convenient to guide the local agricultural production. Results showed that： soil pH was average of 6.77. The contents of soil organic matter, soil total nitrogen, alkali solution nitrogen, available P, available K, gentle available K were 12.51 g/kg, 0.93 g/kg, 93.83 mg/kg, 25.19 mg/kg, 43.86 mg/kg, 157.28 mg/kg. Soil pH was mostly weak acid or neutral. Available P was in general higher level. Total nitrogen and alkali solution nitrogen were in general medium level. But organic matter, available K and gentle available K were in low level. The degree of variation of each nutrition elements range from small to large was available K, gentle available K, organic matter, alkali solution nitrogen, total nitrogen, available P. Therefore, this paper advised to control soil acid and alkaline, stabilize soil nitrogen and phosphorus, and appropriately increase organic fertilizer and potash fertilizer application in Ninglang County.