农业生产中广泛使用的农药、地膜、化肥等农用化学品，造成多种有机物对土壤的复合污染。当有害物质过多，超过土壤的自净能力，就会引起土壤的组成、结构和功能发生变化，微生物活动受到抑制，有害物质或其分解产物在土壤中逐渐积累，并间接危害人体健康。邻苯二甲酸酯（PAEs）是一类环境内分泌物质，作为农用塑料地膜中的增塑剂被大量使用，易从塑料地膜中释放而造成土壤污染。我国农田土壤普遍存在农药、PAEs等有机物复合污染，生物降解是削减土壤中有机污染物的重要途径。试验研究了降解菌DNEH-S1在土壤中对DEHP降解特性及土壤中养分的动态变化，探讨了典型有机物复合污染土壤生物降解技术的可行性。%Phthalic acid esters (PAEs) is a kind of environmental endocrine substances that is widely used as the plas-ticizer in the farming-use plastic iflm, easy to release from the plastic iflm and cause soil polution. Farmland soils commonly show pesticides, PAEs and other organic compound polution in China and biodegradation is an important approach to cut down organic polutants in soil. This experiment studies the degradation bacteria DNEH - S1 in the soil of DEHP degradation charac-teristics and the dynamic changes of the nutrients in the soil, discussing the bio-degradation technology feasibility of typical organic compound contaminated soil.
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