测定使用一段时间后的黄麻土工布相对重量及其纤 维素、木质素、果胶含量的变化。结果表明，各试验小区土工布均有不同程度降解。在覆盖土工布加裸露方式处理试验小区，土工布纤维素降低8.80%、木质素降低3.48%、果胶降低2. 21%；在覆盖土工布加种龙须草方式处理试验小区，土工布纤维素降低4.22%、木质素降低1. 52%、果胶降低0.39%。6个试验小区土壤全N，P，K含量分析结果表明，覆盖土工布试验小区与不覆 盖土工布试验小区相比，土壤N，P，K含量富集明显，土壤肥力增强。

 Experiments were carried out to study the changes of jute geotextiles' relative weight and the content of cellulose,lignin and pecti n after the jute geotextiles were used for a long time.The results showed that a ll of the jute geotextiles had biodegraded in varying degrees.In the experiment area covered by geotextiles without any plant,the content of the cellulose ,lign in and pectin reduced 8.8%,3.48%,2.21%,respectively.In the experiment area covered by jute geotextiles with planted chinese alpine rush,the jute geotextil es' cellulose ,lignin and pectin reduced 4.22%,1.52%,0.39%,respectively.The anal ysis results in the six experiment areas showed that the content of the N,P and K in the soil covered with jute geotextiles was obviously richer than that uncov erd,and the soil fertility improved. 