摘要
本文通过对务川仡佬族苗族自治县(简称务川县,以下同)境内5乡10镇耕地土壤进行野外采样和室内测定,参照全国第二次土壤普查土壤养分分级标准,分析评价了土壤pH、有机质、速效钾、有效磷、全氮状况及其等级分布,结果表明:调查区耕地土壤pH平均值为6.16,总体呈微酸性,有机质、速效钾、有效磷、全氮平均含量分别为25.49 g/kg、155.15 mg/kg、13.41 mg/kg、1.80 g/kg;有机质、速效钾、有效磷均较多分布于Ⅲ等级,比例分别为43.2%、35.2%、60.2%,全氮较多分布于Ⅰ等级,比例为36.6%,各乡镇有机质、速效钾、有效磷、全氮集中处于中上等水平。同时探讨土壤对作物的适宜性,以期对县内的农业生产提供理论参考。
Main cultivated soils in 5 townships and 10 towns of Wuchuan Gelao and Miao Autonomous County（Wuchuan County for short,the same below）were invested by field sampling and laboratory analysis. The status and grade distribution of soil pH,organic matter,available potassium,available phosphorus,and total nitrogen were analyzed and evaluated by reference to the soil nutrient classification standard of the second national soil survey. The results showed that the average pH value of cultivated soil was 6.16,and the total level was slightly acidic. The average content of organic matter,available potassium,available phosphorus,and total nitrogen were 25.49 g / kg,155.15 mg / kg,13.41 mg / kg,and 1.80 g / kg,respectively. The organic matter,available potassium and available phosphorus were more distributed in grade Ⅲ,with the proportions of 43.2%,35.2% and 60.2% respectively. The total nitrogen was more distributed in grade I and the proportion was 36.6%. The grade of organic matter,available potassium,available phosphorus and total nitrogen of all the villages and towns were in the middle and upper level. At the same time,the suitability of the soil for crop was discussed in order to provide theoretical reference for the agricultural production in the county.
出处
《山地农业生物学报》
2016年第2期40-45,共6页
Journal of Mountain Agriculture and Biology
关键词
务川
耕地
土壤养分
含量等级
Cultivated land
Soil nutrient
Grade of nutrient content
