中文摘要：

利用半变异方差函数的方法揭示海坛岛的农田土壤养分空间变异。结果表明：海坛岛土壤有机质、碱解氮、有效磷和速效钾平均含量分别为7.77g/kg、41.68mg/kg、27.57mg/kg和49.12mg/kg,各养分指标变异系数（CV）为中等变异水平。土壤养分由高到低可分为5级,有机质、碱解氮含量较低;有效磷十分丰富;速效钾含量极低。半变异方差函数显示有机质、碱解氮、有效磷和速效钾空间自相关性较低（块金效应都大于85%）。海坛岛土壤养分含量空间分布具有其特殊性,需要增加施肥指导,保持土地的可持续生产能力。

英文摘要：

The spatial variation of the farmland soil nutrient of Haitan island were revealed by the method of Semi-variogram. The results showed that the average content of the OM,AN,AP,AK of Haitan island were 7. 77g/kg,41. 68mg/kg,27. 57mg/kg and 49. 12mg/kg,respectively. The coefficient of variation（ CV） of the four kinds of soil nutrient were during the middle degree. The soil nutrient levels were divided into five grades from high to low,and the OM,AN with a low content; The AP is massive,and the soil was lacked of AK. The Semi-variogram indicated that the OM,AN,AP,AK all were at a low spatial self correlation（ C0/（ C0＋C） 85%）. The soil of Haitan island was unique in the aspect of soil nutrient spatial distribution,thereby the Haitan island need more instruction on fertilization to keep the sustainable production capacity of the soil.