合阳县苹果地土壤有效磷的分布研究

Study on the Distribution of the Effective Phosphorus of Soil at Apple Orchards in Heyang County

为合理制定施肥方案,以合阳县五个乡镇的29个农户苹果园土壤为研究对象,对其有效磷分布状况进行分析。结果显示:29个样地中,不同乡镇有效磷含量存在较大差异,尤以马家庄乡不同农户土壤有效磷含量差异最大,其变异系数为115.37%,属强变异,所有调查样地中最高值(82.9 mg/kg)和最低值(4.2 mg/kg)均出现在该乡;其余乡镇有效磷含量均属中等变异水平。

In order to make reasonable fertilization scheme, the concentration of effective phosphorus in soil a- mong the 86 apple orchards at ChengCheng county was determined. The results show that there were different contents of effective phosphorus in soil at different towns, especially the coefficient of variation at Majiazhuang town was highest and the value was 115.37 percents. The minimum value of the effective phosphorus concen- tration in soil is 4.2 mg/kg and the maximum value is 82.9 mg/kg among these apple orchards. And the ex- treme values were found at Majiazhuang town. The effective phosphorus distribution was characterized by me- dium variation for the rest four towns.