| 摘要: |
| 以不断增加农资投入的方式提高耕地单产，是西部生态退耕区为缓解因耕地数量减少所导致的农作物总产量下降所采取的重要举措，但种植业面源污染潜在风险随之加重。如果不重视这种风险，生态退耕的作用将会被环境污染所抵消，使生态退耕区面临生态退化和环境污染的双重压力。该文以宁夏盐池县为例，利用能值分析探讨西部生态退耕区1998～2008年期间的种植业面源污染潜在风险的变化特征。建议西部生态退耕区的农资投入应限制数量、提高质量和利用率，并不断加强产地环境监测;种植业的可持续发展应该注重生态农业和有机农业的发展。 |
| 关键词: 生态退耕 种植业面源污染 能值分析 宁夏盐池县 |
| DOI：10.7621/cjarrp.1005-9121.20120406 |
| 分类号: |
| 基金项目:国家自然科学基金项目“生态退耕对土地类型结构的影响及环境效应研究（40971282）”（2010-2012） |
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| POTENTIAL RISK OF NON-POINT SOURCE POLLUTION IN ECOLOGICAL RE-FARMING REGION |
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Wang Xiuhong1, Shen Jianxiu2, Zhang Wei3,4,5
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1.Institute of Geographic Sciences and Natural Resources Research， Chinese Academy of Science， Beijing 100101;2.Institute of Geographic Sciences and Natural Resources Research， Chinese Academy of Science， Beijing 100101/Graduate University of Chinese Academy Sciences， Beijing 100049;3.Institute of Remote Sensing and Earth Sciences;4.Hangzhou Normal University;5.Hangzhou 310036
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| Abstract: |
| Crop total yield usually reduced partly because of the grain for green policy in the western ecological re-farming region， which directly affected the survival and income of local people. Local farmers usually increased agricultural materials in order to increase yield of per unit cropland area for growing population and increasing food demand， resulting in serious crop planting potential non-point source pollution. If the situation cannot be controlled， the function and effect of ecological re-farming will be reduced， and Western China will be under pressure from both ecological fragility and environmental pollution. Taking Yanchi County in Ningxia as a study area， this paper analyzed the change of potential risk of non-point source pollution in ecological refarming region during 1998～2008 based on energy analysis. Some suggestions were hence put forward including reducing the agricultural materials input， improving the rate of utilization， enhancing the monitoring of produce area environment， and strengthening on the sustainable development of ecological agriculture and organic agriculture. |
| Key words: Ecological re-farming potential non-point source pollution energy analisys Yanchi County in Ningxia |
