筠连县龙塘村和五凤村土壤肥力调查及改良对策

Investigation and Improvement of Soil Fertility in Longtang Village and Wufeng Village in Junlian County

对筠连县五凤村和龙塘村的土壤进行了采样,检测了土壤中的pH、有机质、速效钾、有效磷、水解性氮等养分含量.结果表明采样范围内各养分土壤pH值变化范围为4.2~5.6;有机质含量变化范围为(22.9~45.2)g/kg;速效钾含量最高为(53.78~96.78)mg/kg;有效磷含量变化范围为(12.18~19.08)mg/kg;水解性氮的含量变化范围为(904.06~1 406.38)mg/kg.土壤肥力等级在三级至四级之间,存在土壤酸化和肥力贫瘠问题,这是由于筠连县降雨量大及山地地形,导致土壤风化强烈和养分流失过快所致,建议采取施用生石灰和有机无机复合肥对土壤进行改良.

The soil of Wufeng Village and Longtang Village in Junlian County was sampled,and the nutrient content of pH,organic matter,available potassium,available phosphorus and hydrolytic nitrogen in soil was measured.The results show that the pH value of each nutrient soil within the sampling range ranged from 4.2 to 5.6;the variation range of organic matter content was(22.9~45.2)g/kg;the highest available potassium content ranged from(53.78~96.78)mg/kg;the available phosphorus content ranged from(12.18~19.08)mg/kg;and the content of hydrolytic nitrogen varied from(904.06~1406.38)mg/kg.The soil fertility level is between three and four grades,and there are problems of soil acidity and poor fertility.This is due to great rainfall and mountainous terrain in Junlian County,which leads to severe soil weathering and rapid nutrient loss.It is recommended to apply limestone and organic-inorganic compound fertilizer to improve the soil.