三亚市农田土壤养分现状及施肥建议

测土配方施肥项目的实施,对摸清三亚市农田土壤状况及肥料使用具有较大意义。通过对三亚市农田土壤样本的采集和检测分析表明,三亚市农田土壤总体显偏酸性,平均pH值5.33;耕层土壤有机质含量范围在0.15%～6.17%,平均为1.66%,标准差0.22;有效磷含量范围在0.36～375.76 mg/kg,平均为33.07 mg/kg,标准差为21.13;速效钾含量范围在0.42～677.68 mg/kg,平均为66.96 mg/kg,标准差为37.06;碱解氮含量平均值为86.81 mg/kg,其变幅范围为1.36～683.53 mg/kg,标准差为12.23。通过全市各镇的土壤养分含量,制定了各镇不同作物的施肥指标建议。

Soil Nutrient Status of Farmland in Sanya City and Its Fertilization Strategy

The implementation of soil testing and formulated fertilization project have great significance for identification soil conditions and fertilizer use of Sanya City.By collection and analysis of the farmland soil of Sanya City,the results showed that the soil was generally acidic,and average pH value was 5.33;farmland soil composition were between 0.15%～6.17% for organic matter,0.36～375.76 mg/kg for available P,0.42～677.68 mg/kg for available K and 1.36～683.53 mg/kg for available N.The average value were 1.66%,33.07 mg/kg,66.96 mg/kg and 86.81 mg/kg,and standard deviation were 0.22,21.13,37.06,12.23 respectively.Fertilizer application guideline for different crops by testing the soil nutrient content of Sanya City were proposed.