洛阳市粮田土壤养分状况分析

分析了洛阳市主要粮田土壤247个土壤样品的养分状况.结果表明,土壤有机质、全氮、速效磷和速效钾的平均含量分别为1.25%、0.91 g/kg、10.88 mg/kg和128.7 mg/kg;总体而言,有机质和全氮含量处于低水平(1%～2%和0.8～1.0 g N/kg),速效磷处于中低水平(5～20 mg P/kg),速效钾处于中等水平(100～150 mg K/kg);有机质、全氮和速效磷含量的次数分布曲线呈高峰偏左的正偏峰,速效钾呈近似为高峰稍微偏右的正态峰;速效磷的变异程度(CV%)最大,有机质和全氮的次之,速效钾的最小.

Analysis of the soil nutrient status of grain crop fields in Luoyang

247 soil samples selected from grain crop fields in Luoyang were examined.The results showed that the average contents of organic matter,total nitrogen,available phosphorus and available potassium were(1.25%,) 0.91 g/kg, 10.88 mg/kg,and 128.7 mg/kg,respectively.As a whole,the contents of organic matter and total N were low,the available P medium to low level,and the available K medium level.Frequency distribution of the contents of soil organic matter,total N,and available P appeared curves of deviating from normal distribution,which has left-deviating peaks,and the available K appeared an approximate normal distribution curve.The order of coefficient of variation(CV%) is available P > organic matter,total N > available K.