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| 乌梁素海流域种 养系统氮素收支及其对当地环境的影响 | |
| 引用本文： | 赵永宏,邓祥征,鲁奇.乌梁素海流域种 养系统氮素收支及其对当地环境的影响[J].生态与农村环境学报,2010,26(5). |
| 作者姓名： | 赵永宏 邓祥征 鲁奇 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所,北京,100101;中国科学院研究生院,北京,100049 2. 中国科学院地理科学与资源研究所,北京,100101;中国科学院农业政策研究中心,北京,100101 3. 中国科学院地理科学与资源研究所,北京,100101 |
| 基金项目： | 国家自然科学基金，国家水体污染控制与治理科技重大专项 |
| 摘 要： | 以内蒙古乌梁素海流域为研究区,建立区域氮素流动模型,研究了2006年种-养系统中氮素的收支状况及其对区域环境的影响。研究结果表明,乌梁素海流域氮素投入主要来源于耕地系统,草地系统的投入量很少。耕地系统氮投入量大于支出量,氮素盈余4.03×104t,平均盈余85.0 kg.hm-2。草地系统氮投入量小于支出量,导致草地系统氮收支亏损,亏损额为593 t,平均亏损0.99 kg.hm-2。大量氮亏损是引起当地草场退化的主要原因。此外,该流域每年随地表径流进入地表水的氮总量达9.25×103t,给当地水环境带来了巨大压力。肥料施用是地表水最主要的氮素来源,因此,控制农业面源污染应是当地水环境控制和管理的重点。 |
| 关 键 词： | 氮 氮流动 乌梁素海流域 区域环境 水环境 种-养系统 |
Nitrogen Budget in Farming-Feeding System and Its Impacts on Local Environment in Wuliangsuhai Lake Watershed |
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| ZHAO Yong-hong,DENG Xiang-zheng,LU Qi.Nitrogen Budget in Farming-Feeding System and Its Impacts on Local Environment in Wuliangsuhai Lake Watershed[J].Journal of Ecology and Rural Environment,2010,26(5). | |
| Authors: | ZHAO Yong-hong DENG Xiang-zheng LU Qi |
| Institution: | ZHAO Yong-hong1,2,DENG Xiang-zheng1,3,LU Qi1(1.Institute of Geographic and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,3.Center for Chinese Agricultural Policy,China) |
| Abstract: | Nitrogen flow in farming is one of the most important factors affecting the human environment,especially water environment.A regional nitrogen flow model was established for analysis of nitrogen budget of the farming-feeding system in the Wuliangsuhai Lake watershed,Inner Mongolia Autonomous Region in 2006 and its influences on the local environment.Results indicate that input of nitrogen in the watershed mainly comes through the farmland system and only a little through the pasture system.In the former the... |
| Keywords: | nitrogen nitrogen flow Wuliangsuhai Lake watershed regional environment water environment farming-feeding system |
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