土壤多糖对不同利用方式下棕壤中各级微团聚体稳定性的影响

The Influence of Getting Rid of Soil Plysaccharideto Stability of Microaggregates in Brown Earth Under Different Land Use Types

采用高碘酸盐氧化法和分组胶散法对比的方法研究了土壤多糖对耕地、园地、林地3种利用方式下棕壤中各级微团聚体稳定性的影响，经分析认为土壤多糖在不同利用方式下棕壤的各级微团聚体的形成和稳定中均起到了较重要的作用，去除土壤多糖后，各级微团聚体的破坏程度均较大。与胶散分组相比较，多糖对耕地和园地棕壤50-250μm和〈10μm微团聚体稳定性的作用较林地的大，说明在林地棕壤中其他的胶结物质可能起着更重要的作用；而在10-50μm微团聚体中多糖对林地的稳定性作用较强。

Soil polysaccharide played a very important role in aggregating agents and stabilization. Treated of soil microaggregates with periodate, all of them destroyed greatly. Compared of dispersing grouping of soil colloid, periodate oxidation was more destroying. Soil polysaccharide was very important to 〈10 μm and 50-250 μm microaggregates forming in cultivated land and corner, showed that perhaps there was other cementing materials playing prior actions in woodland. But in woodland 10-50 μm particles it did more work.