Abstract:

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.