| 黑麦草根系分泌物剂量对污染土壤芘降解和土壤微生物的影响 |
| |
| 引用本文： | Xie XM,Liao M,Yang J. 黑麦草根系分泌物剂量对污染土壤芘降解和土壤微生物的影响[J]. 应用生态学报, 2011, 22(10): 2718-2724 |
| |
| 作者姓名： | Xie XM Liao M Yang J |
| |
| 作者单位： | 1. 浙江大学环境与资源学院实验教学中心,杭州,310058
2. 浙江大学环境与资源学院资源科学系,杭州310058;浙江省亚热带土壤与植物营养重点研究实验室,杭州310058 |
| |
| 基金项目： | 浙江省自然科学基金项目(Y5090001); 浙江省教育厅项目(Y200906259)资助 |
| |
| 摘 要： | 模拟根际根系分泌物梯度递减效应,研究了黑麦草根系分泌物剂量对污染土壤中芘降解特征和土壤微生物生态特征的影响.结果表明:污染土壤中芘残留量随根系分泌物添加剂量的增加呈现先下降后上升的非线性变化,达到最低芘残留量的添加剂量是总有机碳(TOC) 32.75 mg·kg-1,说明此浓度下根系分泌物显著促进了芘的降解;土壤微生物生物量碳和微生物熵的变化趋势与污染土壤中芘残留量变化趋势相反,表明土壤微生物与污染土壤 中芘残留量存在密切关系.芘污染土壤中微生物群落以细菌占主导地位,且细菌变化趋势与芘降解变化一致,表明芘以细菌降解为主,根系分泌物主要通过影响细菌数量,进而影响芘的降解.能催化有机物质脱氢反应的土壤微生物胞内酶——脱氢酶活性的变化与土壤微生物变化趋势一致,进一步证明微生物及其生物化学特性变化是污染土壤中芘残留量随根系分泌物添加剂量变化的生态机制.
|
| 关 键 词： | 芘 微生物 根系分泌物 剂量 |
Effects of ryegrass (Lolium perenne) root exudates dose on pyrene degradation and soil microbes in pyrene-contaminated soil |
| |
| Xie Xiao-mei,Liao Min,Yang Jing. Effects of ryegrass (Lolium perenne) root exudates dose on pyrene degradation and soil microbes in pyrene-contaminated soil[J]. The journal of applied ecology, 2011, 22(10): 2718-2724 |
| |
| Authors: | Xie Xiao-mei Liao Min Yang Jing |
| |
| Affiliation: | XIE Xiao-mei1,LIAO Min2,3,YANG Jing2,3 (1Center of Experiment Teaching,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China,2Department of Resource Science,Zhejing University,3Zhejiang Province Key Laboratory of Subtropic Soil and Plant Nutrition,China). |
| |
| Abstract: | By simulating a gradually decreasing concentration of root exudates with the distance away from root surface in rhizosphere, this paper studied the effects of ryegrass (Lolium perenne) root exudates dose on the pyrene degradation and microbial ecological characteristics in a pyrene- contaminated soil. It was observed that with the increasing dose of ryegrass root exudates, the residual amount of soil pyrene changed nonlinearly, i.e., increased after an initial decrease. When the root exudates dose was 32.75... |
| |
| Keywords: | pyrene microbe root exudates dose |
| 本文献已被 CNKI 万方数据 PubMed 等数据库收录！ |
|
