论文部分内容阅读
本文对采自江西省不同肥力水平红壤及其有机无机复合体有机质和氮素特征研究表明：随着肥力提高，红壤及其有机无机复合体胡／富比、腐殖化度、松／紧比、易氧化有机质均增大，胡敏酸Ｅ＿４／Ｅ＿６减小；松／紧比增大；有机无机复合体粒级增大，胡／富比、腐殖化度增大，胡敏酸Ｅ＿４／Ｅ＿６、松／紧比及易氧化有机质均减小。红壤及其有机无机复合体的酸解性摄占全氟量５５～８６％，各有机态氮组分占酸解性盘比率的大小顺序为：氨基酸态氮＞酸解氨态氮＞酸解未鉴别氮＞氨基糖氮。随土壤肥力提高，原土及同一粒级有机无机复合体中的氨基酸态氮／酸解性氛比、各有机氛组分、氮矿化量和矿化率增大，其中氨基酸态氮对土壤氮素供应贡献最大。有机无机复合体粒级增大，各有机态氮组分含量、氮矿化量及矿化率减小。
In this paper, the characteristics of organic matter and nitrogen in red soil and its organic-inorganic complex collected from different fertility levels in Jiangxi Province were studied. The results showed that with the increase of fertility, the ratio of humus, humus, , The contents of readily oxidizable organic matter increased, the humic acid E_4 / E_6 decreased, the loose / tight ratio increased, the size of organic-inorganic complex increased, the ratio of humic acid to humic acid increased, humic acid E_4 / E_6, loose / tight ratio and easy oxidation of organic matter are reduced. The acidity of red soil and its organic-inorganic complex accounted for 55-86% of the total fluorine content. The order of the ratios of organic nitrogen components to acid-degradable trays was as follows: amino acid nitrogen> acid ammoniated nitrogen> acid solution Unidentified nitrogen> Amino sugar Nitrogen. With the increase of soil fertility, the ratio of amino acid / acidolysis in native soil and the same particle-size organic-inorganic complex increased with the increase of nitrogen mineralization and mineralization, and the ratio of amino acid nitrogen to soil Nitrogen supply contributed the most. Organic-inorganic composite particle size increased, the content of organic nitrogen components, nitrogen mineralization and mineralization rate decreased.