福建东山岛土壤养分综合评价

Comprehensive Valuation on Soil Nutrient in Dongshan Island of Fujian

选取有机质、全氮,全磷、全钾、pH值等8个评价指标,对福建省东山岛土壤养分进行了分析。根据作物效应曲线建立隶属度函数,求得了隶属度值,采用偏相关分析法确定各指标的权重值,然后计算出土壤养分的综合指标值(IFI)。结果表明,IFI值达到或者是接近1.0的土壤没有,达到0.8的也几乎没有,最大值是0.7。大部分土壤养分是中等,约占75%,土壤养分低于0.4的约占25%,说明东山岛土壤养分整体水平较差。针对不同IFI值提出了东山岛土地利用的合理化建议。

The soil nutrient of Dongshan island of Fujian province was analyzed with 8 indexes of organic matter, total nitrogen, total phosphorus, total potassium, pH value etc. as evaluation indexes. The function of membership grade was set up according to the crop effect curve and calculated the value of membership degree. The partial eorrolation analysis was used to ascertain the weight value of the soil nutrient index and then calculated the integrated fertility index （IFI） value of the soil nutrient, The result indicated that there was no soil which could achieve or access to IFI of 1.0, and the one to achieve to 0.8 was also seldom, the maximum value was only 0.7. Most of the soil nutrient was middle, occupying about 75%, and the soil nutrient which was lower than 0.4 occupying about 25%, suggesting that the whole level of soil nutrient in Dongshan island was relatively poor. The rationalization proposal for land utilization in Dongshan island was put forward according to different IFI value.