贫瘠土壤改良剂的配制及应用研究

Study on Preparation and Application of Poor Soil Amendment

[目的]提高贫瘠土壤的有效氮、磷、钾、有机质含量。[方法]以磷石膏、粉煤灰、污泥等废弃物为原料配制土壤改良剂改良8种贫瘠土壤,分析改良前后土样有效氮、磷、钾、有机质含量及pH值的变化情况。[结果]加入改良剂后,土样的肥力和营养组分含量均有大幅度提高,有效氮、磷、钾含量均达到国家2级土壤标准;所配制改良剂对参数基数较低的土壤改良效果较好,而对参数基数较高的土壤改良效果一般;通过理论计算与参数测试,总结出了土壤参数的模型通式,经反代验证,通式的平均误差系数在0.15以内。[结论]该研究为贫瘠土壤的改良提供了技术指导。

[Objective] The aim was to increase the contents of available nitrogen,available phosphorus,available potassium and organic matter and pH value of poor soil.[Method] With phosphogypsum,fly ash and sludge etc waste as the materials,the soil amendment was prepared to improve 8 kinds of poor soil.The change of contents of available nitrogen,available phosphorus,available potassium and organic matter and pH value of the soil samples pre and post of improvment was analyzed.[Result] After addition of soil amendment,the fertility and nutrient element contents of the soil samples were increased greatly,and the contents of available nitrogen,available phosphorus and available potassium were all reached to 2 grade of national soil standard.The improvement effect of the prepared soil amendment on soil with lower parameter radix was good,while its improvement effect on sol with higher parameter radix was common.The general formula of soil parameter model was summarized through theoretical calculation and parameter test.And the average error coefficient of the general formula was within 0.15 through reverse substitution verification.[Conclusion] The study provided the technical guidance for the improvement of poor soil.