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本文通过对黑土、棕壤各级微团聚体组成及其胶结物质的研究表明,不同肥力水平的土壤各级微团聚体组成不同,随着肥力水平的提高,大于10μm微团聚体含量增加,增加幅度为2—5%;土壤团聚度增大,增大范围为2—8%。相关分析表明,土壤有机质含量,特别是松结合态有机质含量与大于10μm的微团聚体含量呈显著正相关,而紧结合态有机质含量及土壤中小于2μm的粘粒则与小于10μm的微团聚体含量呈正相关。去除各种胶结物质以后各级微团聚体的破坏率也证实了这一点。由此认为,各种胶结物质对不同粒级微团聚体的形成影响各异,小粒级微团聚体的形成主要受紧结合态有机质和粘粒的影响,大粒级微团聚体的形成则主要与松结合有机质以及多糖类物质有关。
In this paper, the study on the composition of micro-aggregates and their cements in different levels of black soil and brown soil showed that the composition of micro-aggregates at different levels of soil fertility was different. With the increase of fertility level, the content of micro-aggregates larger than 10μm increased The range of 2-5%; soil aggregation increased, increasing the range of 2-8%. Correlation analysis showed that there was a significant positive correlation between soil organic matter content, especially pine - associated organic matter content and microaggregate content greater than 10μm, while tightly bound organic matter content and soil less than 2μm clay particles were associated with micro - aggregates less than 10μm Content was positively correlated. This is confirmed by the rate of destruction of microaggregates at various levels after various cements are removed. It is concluded that the effects of various cements on the formation of micro-aggregates of different size fractions are different. The formation of small-sized micro-aggregates is mainly affected by tight-bound organic matter and clay, and the formation of macro-aggregates is mainly related to Pine with organic matter and polysaccharides related.