恩施市农业土壤理化性质研究

Study on the Physical and Chemical Properties of the Agriculture Soil of Enshi City

[目的]分析恩施市土壤理化性质,判断土壤肥力级别,研究耕作层土壤理化性质之间的关系。[方法]分析土壤样品的理化性质,根据我国旱地土壤肥力标准判断恩施市土壤肥力,分析各理化性质之间的相关性。[结果]恩施市土壤中有机质、全氮、速效磷、速效钾平均含量和阳离子交换量(CEC)分别为29.96g/kg、0.80g/kg、7.18mg/kg、126.45mg/kg、18.59cmol/kg。其氮、磷、钾和CEC均达到了旱地土壤肥力Ⅱ级水平,其中速效钾和有机质含量达到了Ⅰ级标准,达到较高水平。[结论]恩施市土壤肥力水平较高,土壤CEC与土壤速效钾、有机质、全氮和酸碱度显著相关。土壤酸碱度和土壤孔隙度相关性显著。

[ Objective] The paper aimed to analyze the physical and chemical properties of the cultivated soil, judge the grade of the soil fertility of Enshi City and study on the relationship of the physical and chemical properties of the soil. [ Method] The physical and chemical prop- erties of the soil was analyzed, and the grade of the fertility of the soil was judged according to the grade 2 value of the dry land soil fertility, the correlation of the physical and chemical properties was investigated. [ Result] Mean value of the organic matter, total nitrogen, available phosphorus and potassium in Enshi City were 29.96 g/kg, 0.80 g/kg, 7.18 mg/kg, 126.45 mg/kg, 18.59 emol/kg. Nitrogen, phosphorus and potassium and CEC had reached the 2 grades level of soil fertility in dry land, and available K and organic matter content had reached 1 level standard, belonged to high level. [ Conclusion] The fertility of the cultivated soil in Enshi was high relatively, the correlation between the CEC and available K, organic matter, total N and pH value was prominent. The correlation between the pH value and the soil porosity percentage was also prominent.