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土壤多糖是土壤有机质的重要组成部分，我们通过对连作条件下土壤多糖的研究表明，由于连作使土壤多糖的组成发生了较大的变异。从土壤多糖的来源看，随连作时间的延长，微生物多糖逐步增加，而植物性多糖逐步减少。经统计分析表明，组成土壤多糖的单糖根据其性质可分为两类，他们在性质上和来源上有所不同，他进一步证实了以前对土壤多糖组成的分类方法是正确的，同时也为我们的试验提供了数量化的指标。
Soil polysaccharide is an important part of soil organic matter. Through the research on soil polysaccharides under continuous cropping condition, we found that the composition of soil polysaccharides changed greatly due to continuous cropping. From the source of soil polysaccharides, with the extension of continuous cropping, microbial polysaccharides gradually increased, and plant polysaccharides gradually reduced. The statistical analysis shows that the monosaccharides constituting soil polysaccharides can be divided into two categories based on their properties. They differ in their nature and origin, and further confirm that the classification method of soil polysaccharides was correct and at the same time Our experiments provide quantitative indicators.