| 王志刚,胡影,徐伟慧,莫继先,李珊珊,张志,杨志宏.邻苯二甲酸二甲酯污染对黑土土壤呼吸和土壤酶活性的影响[J].农业环境科学学报,2015,34(7):1311-1316. |
| 邻苯二甲酸二甲酯污染对黑土土壤呼吸和土壤酶活性的影响 |
| Impacts of Dimethyl Phthalate Contamination on Respiratory Rates and Enzyme Activities in Black Soil |
| 投稿时间：2015-01-20 |
| DOI：10.11654/jaes.2015.07.012 |
| 中文关键词: 邻苯二甲酸二甲酯(DMP) 黑土 土壤呼吸 土壤酶 污染 |
| 英文关键词: dimethyl phthalate(DMP) black soil soil respiration soil enzyme contamination |
| 基金项目:国家自然科学青年基金(31200390);黑龙江省教育厅高校青年学术骨干支持计划项目(1245G068) |
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| 中文摘要: |
| 通过温室中进行的微宇宙实验,探讨了不同浓度邻苯二甲酸二甲酯(Dimethyl phthalate, DMP)污染对黑土土壤呼吸和酶学活性的影响。研究结果表明,DMP污染处理后黑土微生物呼吸速率和代谢熵均表现为低浓度(5 mg·kg-1)促进,高浓度(10、20、40 mg·kg-1)抑制,且抑制效应与DMP污染浓度正相关;DMP污染对黑土过氧化氢酶具有抑制效应,对黑土转化酶和脲酶呈现为激活效应,且与污染浓度正相关;DMP污染对黑土多酚氧化酶和蛋白酶呈现随时间波动而变化的趋势,多酚氧化酶表现为先抑制后促进,蛋白酶则为先促进后抑制。通过典型对应性分析发现DMP是影响黑土酶学性质改变的主要因素,DMP污染改变了黑土代谢特征,进而可能影响黑土的生态系统功能。 |
| 英文摘要: |
| Dimethyl phthalate(DMP), one of the phthalate esters, is ubiquitous environmental pollutant in soil, and is listed as an environmental priority pollutant by China's Ministry of Environmental Protection(MEP). Black soil(Mollisols) is extremely important soil resources and mainly distributes in Northeast China. In this study, a microcosm model was set up to estimate the impacts of DMP contamination on microbial respiration and enzyme activities in black soil. Microbial respiratory rates and metabolic quotients of black soil were promoted by low DMP concentration(5 mg·kg-1), but inhibited by high DMP concentrations(10 mg·kg-1, 20 mg·kg-1 and 40 mg·kg-1). The inhibition was positively correlated with DMP concentrations. DMP inhibited catalase, but promoted invertase and urease in dose-effect manner. Activities of polyphenol oxidase and protease fluctuated during incubation course. Polyphenol oxidase activity showed initial inhibition followed by promotion; whereas protease activity displayed initial promotion followed by inhibition. Canonical correspondence analysis showed that DMP could be the key factor that alters the metabolic characteristics of black soil and impacts ecosystem functions by affecting the enzymatic properties of black soil. |
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