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当前位置: 首页 > 文章 > 全灭菌环境下蚯蚓和堆肥对土壤五氯酚老化过程的影响 农业环境科学学报 2011,30 (11) 88-94
Position: Home > Articles > Effects of Earthworms and Compost on Aging Process of Pentachlorophenol in Sterile Soil Journal of Agro-Environment Science 2011,30 (11) 88-94

全灭菌环境下蚯蚓和堆肥对土壤五氯酚老化过程的影响

作  者：
朱小平;李晓敏;李永涛;蔺中;蔡燕飞;董军
单  位：
华南农业大学资源环境学院
关键词：
五氯酚;老化;蚯蚓;堆肥;形态转化
摘  要：
通过全灭菌环境下的土壤五氯酚(PCP)污染模拟实验,分别测定水提取态、乙醇提取态、腐殖质固定态以及蚯蚓生物累积态PCP的变化,研究添加两种不同蚯蚓品种(赤子爱胜蚓和壮尾环毛蚓)和堆肥对土壤PCP老化过程的影响。结果显示,在42d的培养期内,水提取态PCP在全灭菌土壤对照和添加灭菌堆肥的处理中随时间推移逐渐下降,存在明显的老化效应。在蚯蚓处理中,水提取态PCP呈现先下降后上升的趋势,说明蚯蚓促进土壤PCP的解吸附,这主要与蚯蚓的生物扰动作用以及调节土壤pH趋向中性的作用直接相关。培养结束时,蚯蚓能够有效促进土壤PCP向腐殖质固定态转化,并进一步促进PCP的去除,这与蚯蚓提高土壤腐殖质的含量,促进PCP的化学还原转化作用以及蚯蚓自身对PCP的消解作用有关。壮尾环毛蚓比赤子爱胜蚓更能有效促进PCP的转化与去除,这与两者的生活习性不同有关。灭菌堆肥对全灭菌土壤PCP向其他形态转化的影响不显著。
译  名：
Effects of Earthworms and Compost on Aging Process of Pentachlorophenol in Sterile Soil
作  者：
ZHU Xiao-ping1, LI Xiao-min1, LI Yong-tao1*, LIN Zhong1, CAI Yan-fei1, DONG Jun1, 2 (1.College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; 2.University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528403, China)
关键词：
pentachlorophenol; aging; earthworm; compost; transformation
摘  要：
Effects of two ecological earthworm species(Eisenia foetida and Amynthas robustus) and sterile compost on the aging process of pentachlorophenol(PCP) in sterile soil were investigated in the present study. Concentrations of water-extractable PCP, ethanol-extractable PCP, humus-fixed PCP and earthworm-accumulated PCP were monitored during 42 days of incubation. The results showed that concentrations of water-extractable PCP decreased over time in control and sterile compost treatment during the aging process. The water-extractable PCP concentrations in the presence of earthworms decreased from day 0 to day 14, and then increased from day 14 to day 42, suggesting that the activity of earthworm could enhance soil PCP desorption, which might be related to their increasing effect on soil pH. After 42 days of incubation, transformation to humus-fixed PCP and removed PCP were significantly enhanced in two earthworm treatments, probably because the earthworm could increase the content of humus, strengthen the chemical reduction of PCP by organic acids excretion, and intestinal digestion in the gut of earthworm. In addition, significant higher concentrations of humus-fixed PCP and removed PCP were obtained in treatment with Amynthas robustus than that with Eisenia foetida, indicating that Amynthas robustus could improve soil PCP transformation and removal more effectively than Eisenia foetida. No significant influence on the PCP transformation in sterile soil was observed by the addition of sterile compost.

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