华北平原农田生态系统服务评价及灌溉效益分析

发布时间：2018-05-22 20:24

本文选题：农田生态系统 + 能值分析　；参考：《中国生态农业学报》2017年09期

【摘要】：农田生态系统为人类提供农产品等服务的同时,对生态环境也产生负面影响。本文基于千年生态系统评估(MA)框架,以华北平原典型高产农田区域——河北省石家庄市栾城区为研究对象,应用能值理论分析农田生态系统投入,从供给、调节和支持3方面分析农田生态系统正、负服务产出;应用分摊系数法求解农田灌溉净效益,计算能值指标并评价农田生态系统可持续发展状况。结果表明:研究期间栾城农田生态系统能值年均总投入(1.00×1012 sej·m~(-2))中,不可更新工业辅助能(6.81×1011 sej·m~(-2))与不可更新环境资源(灌溉用地下水,2.57×1011 sej·m~(-2))投入之和占总能值投入的90%以上,说明农田生态系统消耗了大量不可更新资源;农田提供的正服务(1.82×1012 sej·m~(-2))主要是农产品供给(1.07×1012 sej·m~(-2)),负服务(5.87×1011 sej·m~(-2))以温室气体排放(5.31×1011 sej·m~(-2))为主;考虑农田生态系统环境负效益,计算栾城农田灌溉效益分摊系数为0.32,灌溉净效益为3.94×1011 sej·m~(-2),灌溉效益偏低;栾城区能值可持续发展指标取值为0.10~0.18,属于典型的消费型农田生态系统,迫切需要探索出一条低能耗,高产出的真正意义上的高质量农田发展之路,实现农田生态系统健康可持续发展。
[Abstract]:While agricultural ecosystem provides agricultural products and other services to human beings, it also has a negative impact on the ecological environment. Based on the framework of Millennium ecosystem Assessment (MA), this paper takes Luancheng District, Shijiazhuang City, Hebei Province as the research object, and applies the theory of energy to analyze the input of farmland ecosystem. The positive and negative service output of farmland ecosystem was analyzed from three aspects of regulation and support, and the net benefit of farmland irrigation was calculated by the method of sharing coefficient, and the energy index was calculated and the sustainable development of farmland ecosystem was evaluated. The results showed that in the total energy input of Luancheng farmland ecosystem of 1.00 脳 1012 sej / m ~ (-2), the sum of the energy input of non-renewable industrial auxiliary energy (6.81 脳 1011 sej) and non-renewable environmental resources (irrigation groundwater 2.57 脳 1011 sej / m ~ (-2) accounted for more than 90% of the total energy input during the study period. It shows that farmland ecosystem consumes a large amount of non-renewable resources, and the main positive service provided by farmland is 1.07 脳 1012 sej / m ~ (2) (1. 07 脳 1012 sej / m ~ (2), and the negative service is 5.87 脳 1011 sej / m ~ (-2) / m ~ (2) ~ (2), which is mainly composed of greenhouse gas emission (5.31 脳 1011 sej / m ~ (-2), and considering the negative environmental benefits of farmland ecosystem, In Luancheng, the distribution coefficient of irrigation benefit is 0.32, the net benefit of irrigation is 3.94 脳 1011 sej / m ~ (-2), the irrigation benefit is low, the value of energy value sustainable development index is 0.10 ~ 0.18, which belongs to the typical consumptive farmland ecosystem, and it is urgent to explore a low energy consumption. The development of high quality farmland in the real sense of high output can realize the healthy and sustainable development of farmland ecosystem.
【作者单位】：河北科技大学经济管理学院;河北省生态经济可持续发展研究中心;河北科技大学机械工程学院;
【基金】：河北省社会科学基金项目(HB15YJ059)资助~~
【分类号】：S181;S274

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