| 垂直流湿地基质中酶的分布与氮磷及有机质的关系 |
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| 引用本文： | 许巧玲,王小毛,崔理华,李哲,林顺娇.垂直流湿地基质中酶的分布与氮磷及有机质的关系[J].环境科学研究,2016,29(8):1213-1217. |
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| 作者姓名： | 许巧玲 王小毛 崔理华 李哲 林顺娇 |
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| 作者单位： | 1.安顺学院资源与环境工程学院, 贵州 安顺 561000 |
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| 基金项目： | 国家自然科学基金项目(41271245)；广东省科技计划项目(2012A020100003)；广东省教育厅广东高校污水生态处理与水体修复工程技术研究中心建设项目(2012gczxA1004) |
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| 摘 要： | 为了解垂直流人工湿地基质中酶的空间分布特点及其与基质中氮磷和有机质的关系,采用垂直流人工湿地微宇宙试验系统进行了为期4个月的运行试验,分析种植植物的皇竹草系统和不种植物的对照系统基质中不同深度层酶活性的变化,以及酶活性与基质中污染物的关系. 结果表明:脲酶、磷酸酶、过氧化氢酶、转化酶、蛋白酶和纤维素酶这6种酶的活性在上层(0~<10 cm)的分布特点相一致,即皇竹草系统基质中的酶活性显著高于对照系统(P＜0.05). 在垂直方向上,两个系统中6种酶的活性都表现为上层显著较高,这与基质中w(TN)、w(TP)和w(有机质)的分布规律相一致；Pearson相关性分析发现,脲酶活性与w(TN)、w(TP)、w(有机质)均呈极显著正相关(相关系数依次为0.951、0.970、0.933,P均小于0.01),过氧化氢酶、转化酶活性均与w(TN)呈极显著正相关(相关系数依次为0.997、0.916,P均小于0.01),磷酸酶活性与w(TP)、w(有机质)均呈极显著正相关(相关系数依次为0.925、0.919,P均小于0.01),转化酶活性与w(TP)呈显著相关(相关系数为0.869,P<0.05),纤维素酶活性与w(有机质)呈显著相关(相关系数为0.864,P<0.05). 研究显示,在垂直流人工湿地系统中种植皇竹草有助于提高基质中酶的活性,酶活性与氮磷及有机质等污染物的积累和迁移密切相关.
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| 关 键 词： | 垂直流人工湿地 酶活性 污染物 空间分布 |
| 收稿时间： | 2015/7/20 0:00:00 |
| 修稿时间： | 2015/12/15 0:00:00 |
Spatial Distribution of Substrate Enzyme and Its Relationship with TN, TP and Organic Matter Content in a Vertical Flow Constructed Wetland |
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| XU Qiaoling,WANG Xiaomao,CUI Lihu,LI Zhe and LIN Shunjiao.Spatial Distribution of Substrate Enzyme and Its Relationship with TN, TP and Organic Matter Content in a Vertical Flow Constructed Wetland[J].Research of Environmental Sciences,2016,29(8):1213-1217. |
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| Authors: | XU Qiaoling WANG Xiaomao CUI Lihu LI Zhe and LIN Shunjiao |
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| Affiliation: | 1.Department of Resources & Environmental Engineering, Anshun University, Anshun 561000, China2.College of Resource & Environment, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | In order to investigate the spatial distributions of substrate enzyme characteristics and enzyme relationships to TN, TP and OM (organic matter) content in a vertical flow constructed wetland (VFCW), a microcosmic experiment was conducted for four months. The results showed that, urease, phosphatase, catalase, invertase, protease and cellulase at the top 0-10 cm of the VFCW had similar distribution characteristics. For example, the enzyme activity in the VFCW system planted with pennisetum hydridum was significantly higher than that without pennisetum hydridum (P<0.05). The substrate enzymes in the VFCW system demonstrated the following trend:the contents of the aforementioned six enzymes were significantly higher at the top 0-10 cm than others in the VFCW. The changes in substrate enzyme contents were consistent with the changes of w(TN), w(TP) and w(OM) contents in the VFCW matrix. Statistical analysis showed that the relationships of urease to w(TN), w(TP) and w(OM) based on R2 values were, respectively, 0.951,0.970 and 0.933; the relationships of catalase and invertase to w(TN) were, respectively, 0.997 and 0.916; the relationships of phosphatase to w(TP) and w(OM) were, respectively, 0.925 and 0.919; the relationship of invertase to w(TP) was 0.869; and the relationship of cellulase to w(OM) was 0.864. Overall, the study showed that the VFCW planted with pennisetum hydridum improved the enzyme activity in the substrate. Substrate enzyme activity was positively correlated to the accumulation and migration of TN, TP and OMs in the substrate. The results of this study can provide a theoretical reference on enzyme activities in the constructed wetlands. |
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| Keywords: | vertical flow constructed wetland enzyme activity pollution spatial distribution |
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