高集约化农区投入减量化与环境风险降低潜势的时空分异特征

发布时间：2018-03-01 15:24

本文关键词： 土地利用污染农业氮足迹灰水足迹环境效率投入减量环境风险　出处：《农业工程学报》2017年02期 　论文类型：期刊论文

【摘要】：该文应用氮足迹(nitrogen footprint,N footprint)、灰水足迹(grey water footprint,GWF)理论,以上海市青浦区为案例区,对集约农业土地利用系统的活性氮排放和非点源污染进行分析,运用非期望产出的SBM-Undesirable窗式分析模型,系统解析农业土地利用环境效率时空分异特征,综合评估农业土地利用系统投入减量化趋势与环境风险降低潜势。结果表明:1)在考虑活性氮排放和非点源污染约束下,2006-2013年青浦区农业土地利用环境效率相对较低,2006-2013年均值仅为0.669;2)2006-2013年青浦区年均劳动力、肥料和机械动力的潜在减量比例较高,8 a间潜在年均缩减总量分别为8 10~4人,4 501.59 t,27 928.44 k W;非点源污染灰水足迹的潜在减排比例高于污染氮足迹,潜在减排总量年均分别为52 046.88万m~3和381.04 t。花香桥街道具有最大的潜在投入减量化与环境风险降低比例。白鹤镇、练塘镇等具有较大的潜在缩减规模,应成为青浦区农业投入减量化和污染物减排总量控制的重点区域。该文评价结果可为制定农业可持续发展规划及农业产业政策提供参考。
[Abstract]:The application of nitrogen footprint (nitrogen footprint, N footprint), grey water footprint (grey water footprint, GWF) theory, taking Qingpu District of Shanghai city as the study area, the reactive nitrogen emissions and non-point source pollution of agricultural land intensive utilization system is analyzed, using the non expected output of the SBM-Undesirable window system analysis model. The environmental efficiency of agricultural land use spatial analysis and spatial distribution, comprehensive assessment of agricultural land use system into the reduction trend and risk reduction potential. The results showed that: 1) in consideration of reactive nitrogen emissions and non-point source pollution constraints, 2006-2013 years Qingpu district agricultural land use efficiency is relatively low, the average of 2006-2013 years only 0.669; 2) Qingpu District 2006-2013 years average annual labor, fertilizer and mechanical power potential reduction ratio is higher, 8 a potential annual reductions in the amount were 8 10~4, 4501.59 T, 27928.44 K W; non point The proportion of the potential reduction of grey water footprint source pollution is higher than the total emissions of nitrogen pollution footprint, the potential annual were 520 million 468 thousand and 800 m~3 and 381.04 T. flower Bridge Street has the largest potential investment reduction and reduce environmental risks. The proportion of Baihe Town, Liantang Town has a large potential reduction scale, should become a key area of reduction and pollutant emission reduction the total control of the Qingpu district agricultural inputs. The evaluation results can provide a reference for the formulation of sustainable agricultural development planning and agricultural policy.

【作者单位】：中国农业大学资源与环境学院;淮海工学院法学院;
【基金】：国家自然科学基金重点项目(41130526) 淮海工学院科研基金资助项目(S201605)
【分类号】：F323.22

【相似文献】