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土壤有机质绝大部分与土壤矿质部分结合在一起。有机质与矿质部分结合是形成土壤良好结构的必要条件,同时也是有机质本身生物学稳定性较高的一个重要原因。研究土壤中不同粒径和比重的有机-无机复合体中有机质含量和组成,将有助于更好地了解有机质在土壤发生和土壤肥力中的作用。一些研究者通过这种途径已对一些自然植被下的土壤和早地土壤进行了研究,但对水稻土这方面的研究还未见有报道。本工作的目的在于研究不同种类和不同肥力水平的水稻土各粒级中有机质的含量和组成。
Most of soil organic matter and soil mineral part together. Organic matter and mineral part of the combination is the necessary conditions for the formation of a good soil structure, but also a high biological stability of organic matter itself is an important reason. Studying the organic matter content and composition of organic-inorganic complexes with different particle sizes and specific weights in soils will help to better understand the role of organic matter in soil development and soil fertility. Some researchers have studied some soils and early soils under natural vegetation in this way, but there is no report on paddy soils. The purpose of this work is to study the content and composition of organic matter in each grade of paddy soils with different types and levels of fertility.