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| 湿地硝酸还原酶活性变化的干湿交替驱动机制 | |
| 引用本文： | 韩建刚,郑伟,吴春笃,朱咏莉.湿地硝酸还原酶活性变化的干湿交替驱动机制[J].环境科学与技术,2011,34(5):7-9,76. |
| 作者姓名： | 韩建刚 郑伟 吴春笃 朱咏莉 |
| 作者单位： | 1. 江苏大学环境学院,江苏镇江,212013;现代农业装备与技术省部共建教育部重点实验室,江苏镇江,212013 2. 江苏大学环境学院,江苏镇江,212013 3. 现代农业装备与技术省部共建教育部重点实验室,江苏镇江,212013 |
| 基金项目： | 国家自然科学基金，江苏省高校自然科学基础研究面上项目，中国博士后科学基金项目资助，江苏省博士后科研计划项目资助 |
| 摘 要： | 以北固山湿地沉积物为研究对象,采用室内培养方法研究不同前期含水率(1%～ 3%、7%～11%和16%～18%,重量百分数)沉积物变湿后(60%)以及由湿变干过程(从70%变干至5%～7%)硝酸还原酶(Nar)活性的变化规律,以期为干湿交替水分生态过程N2O形成与排放的评估提供依据.结果表明,在变湿后的48h,前期含水率... |
| 关 键 词： | 沉积物 硝酸还原酶 干湿交替 湿地 |
Response of Nitrate Reductase Activity to Alternation of Drying and Rewetting for Sediment from a Reed Wetland |
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| HAN Jian-gang,ZHENG Wei,WU Chun-du,ZHU Yong-li.Response of Nitrate Reductase Activity to Alternation of Drying and Rewetting for Sediment from a Reed Wetland[J].Environmental Science and Technology,2011,34(5):7-9,76. | |
| Authors: | HAN Jian-gang ZHENG Wei WU Chun-du ZHU Yong-li |
| Affiliation: | 1.School of Environment,Jiangsu University,Zhenjiang 212013,China;2.Joint Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education and Jiangsu Province,Zhenjiang 212013,China) |
| Abstract: | Sediment samples from Mount Beigu wetland were incubated to investigate the activity variations of nitrate reductase(Nar) under the conditions of rewetting from the respective antecedent moisture of 1%～3%,7%～11% and 16%～18% to 60% and drying from 70% to 5%～7%(gravimetric moisture),which aimed to more accurately evaluate N2O emissions during the rewetting and drying process.Nar activities for sediment with antecedent moisture of 16%～18% were higher than those with antecedent moisture of 16%～18% and 1%～3% in 48h after rewetting.The lowest activities of Nar existed in the sediment with antecedent moisture of 1%～3%,which indicated that the higher the antecedent moisture,the higher the Nar activities when the sediment drying from 70% to 19%～22% during the drying process.The decreasing water content in a lower water regime leads to higher Nar activities for the sediment. |
| Keywords: | sediment nitrate reductase(Nar) alternation of drying and rewetting wetland |
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