平山县耕地土壤有机质现状及其演变初探

Current Situation and Evolution of Cultivated Soil Organic in Pingshan County

采用野外采样、室内分析、地统计、地理信息技术等方法,调查研究了平山县耕地土壤有机质现状和空间变异特征。结果表明:平山县耕地土壤有机质含量总体呈正态分布,土壤有机质平均含量为18.08 g/kg;耕地土壤有机质(SOM)含量的空间分布呈现自东南向西北逐渐增高的趋势;参照全国第二次土壤普查有机质含量标准,平山县耕地土壤有机质含量较低,总体处于不缺水平;处于Ⅰ级(丰富)、Ⅱ级(富)和Ⅲ级(较富)等级的耕地占耕地总面积的27.9‰,Ⅳ级(不缺)的耕地面积占耕地总面积的70.1%。

The current situation and characteristics of spatial variability of cultivated soil organic in Pingshan County were studied using filed sampling,laboratory analysis,geo-statistic analysis and geographic information technology and so on.The results indicated that the the cultivated soil organic matter content showed normal distribution with an average of 18.08 g/kg.The spatial distribution of cultivated soil organic matter content showed increasing trend from south east to north west.Compared with the soil organic matter content standard of the Second National Soil Survey,the cultivated soil organic matter content was lower,and in general was sufficient.The soil area of Grade Ⅰ（sufficient enough）,Ⅱ（sufficient）and Ⅲ（just sufficient） was 27.9% of the total soil area,and that of Grade Ⅳ（enough）was 70.1%.