摘要
[目的]研究庐山地区红壤剖面和养分状况.[方法]在庐山红壤分布区挖土壤剖面观察土壤分层和形态,分析A、B1、B2、Csv不同土层全氮、速效磷、速效钾的含量.[结果]红壤A层土层厚度为0 ～9 cm,B1层为9～25 cm,B2层为25～ 108 cm,Csv达108 ～ 124 cm,A层的pH为4.75;全氮、速效磷、速效钾均表现出随土壤深度的增加呈下降趋势,其中全氮和速效钾含量下降明显,全氮含量从1.31 g/kg下降至0.38 g/kg,速效钾从46.73 g/kg下降至15.46 g/kg,分别下降了70.99％和66.92％,速效磷在A层土壤中的含量为8.10 g/kg,在B1层的含量为5.31 g/kg,下降了34.44％,降幅较大,在C层为4.94 g/kg,降幅仅为6.97％.[结论]庐山地区红壤剖面质地均匀,土壤水土流失严重,酸化明显,养分含量不足.
Abstract
[Objective] The aim was to explore red soil profile and nutrient status in Mount Lu area.[Method] Soil stratification and morphology was observed in red soil distribution area in Mount Lu area,total nitrogen,available phosphorus,available potassium content in A,B1,B2,CSV layers were analyzed.[Result] The thickness of A layer of red soil was 0-9 cm,B1 layer was 9-25 cm,B2 layer was 25-108 cm,Csv reached 108 -124 cm,pH of A layer was 4.75;total nitrogen,available phosphorus,available potassium showed a decreasing trend with increase of soil depth,the total N and available K content decreased significantly,total N content decreased from 1.31 to 0.38 g/kg,available potassium decreased from 46.73 to 15.46 g/kg,respectively,a decrease of 70.99％ and 66.92％.The content of available P in A,B1 and C layer was 8.10,5.31 and 4.94 g/kg,a decline of 34.40％ and 6.97％.[Conclusion] The red soil profile in Mount Lu area is of uniform texture,soil erosion is serious,acidification is obvious,and nutrient content is insufficient.
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维普
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