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以国家肥力网湖南祁阳红壤长期定位试验站的长期施用有机肥和长期施用化肥的土壤为研究对象，采用干筛法获得土壤微团聚体。利用同步辐射红外显微成像法研究土壤微团聚体中黏土矿物和有机官能团的原位分布图谱及其相关性。结果表明：土壤中黏土矿物（3 620 cm-1）和大分子有机物（脂肪，2 920 cm-1；蛋白质，1 650 cm-1；多糖，1 080 cm-1）呈高度异质性的分布规律。其中，黏土矿物和多糖有较为相似的分布模式；而黏土矿物和脂肪、蛋白类物质则呈现差异较大的分布模式。与长期施化肥处理的土壤微团聚体相比，长期施有机肥处理的土壤微团聚体中黏土矿物和大分子有机物呈现更高的分散性。此外，施有机肥和化肥处理的土壤微团聚体样品中黏土矿物与有机官能团的决定系数（R2）均为：黏土矿物-脂肪 > 黏土矿物-多糖 > 黏土矿物-蛋白质，表明土壤微团聚体中黏土矿物和大分子有机物的亲和性有差异，且该差异不受长期施肥处理的影响。同步辐射微区域红外谱进一步表明，从土壤微团聚体外部到内部，黏土矿物的特征峰和大分子有机物的特征峰强度均逐渐增加。
Long-term application of organic fertilizer and long-term application of chemical fertilizers by National Fertility Network in Qinyang Red Soil Long-Term Pilot Station of Hunan Province were used as the research object, and the dry-sieving method was used to obtain soil micro-aggregates. Simultaneous Irradiation Infrared Microscopy Study of In Situ Distribution Map of Clay Minerals and Organic Functional Groups in Soil Microaggregates and Their Correlation. The results showed that there was a highly heterogeneous distribution of clay minerals (3 620 cm -1) and macromolecular organic compounds (fat, 2 920 cm -1, protein 1 650 cm -1, polysaccharide, 1 080 cm -1) law. Among them, clay minerals and polysaccharides have similar distribution patterns, while clay minerals, fat and protein substances show quite different distribution patterns. Compared with long-term fertilization of soil microaggregates, clay minerals and macromolecules in soil microaggregates treated with long-term organic fertilizer show higher dispersibility. In addition, the determination coefficients (R2) of clay minerals and organic functional groups in soil organic and inorganic fertilizer-treated soil microaggregates are: Clay mineral-fat> Clay mineral-polysaccharide> Clay mineral-protein, Body clay minerals and macromolecular organic affinity differences, and the difference is not affected by long-term fertilization. The synchrotron radiation micro-region infrared spectrum further shows that the characteristic peaks of clay minerals and the characteristic peaks of macromolecular organic substances increase gradually from the outside to the interior of soil micro-aggregates.