摘要
为促进农业循环园区降低资源消耗和减少污染,实现农业现代化的新要求,该文构建了农业园区循环经济系统能值评价指标体系,以西北某农业科技园区为例进行评价。结果表明:该园区经济发展程度整体较好,但二三产业发展较为薄弱;园区能值投资率为8.06,能值产出率为1.12,能值再利用率为29.27%,整体资源再利用程度偏低;园区环境负荷率为8.11,废弃物能值比为11.57%,废弃物利用率为69.61%,废弃物资源化利用程度有限;可持续发展指数为1.61,改进的可持续发展指数为3.42,生态效率指数为0.88,产业结构较为单一且不均衡。建议园区改善资源利用,优化产业结构,增加系统强度和生产效率。该研究对国内其他农业园区循环经济的发展评价也有借鉴意义。
Circular agricultural park is a new organizational form of agricultural intensive production and enterprise management. It is also a cut-in point for the close combination of agricultural science and technology with rural economy and an important carrier for the transformation of high-tech achievements into real productive forces. In order to promote the reduction of resource consumption and pollution reduction in the circular agricultural park, realize the new requirements of agricultural modernization, with the development of agricultural supply side as the main line, the green development as the guide, and the institutional reform and mechanism innovation as the driving force.“Reduce”,“Reuse” and “Recycle” are the core agricultural recycling economy. Based on the field research, the emergy value analysis is used to analyze and calculate the ecological flow in the agricultural recycling park system, and to reduce non-renewable resource consumption and reduce pollution. In order to maximize the economic benefits, the discharge pressure is the goal of building the circular economy system emergy value evaluation index system. Taking an agricultural science and technology park in the northwest as an example, the demand for various resources in the ecosystem of the park and the pressure of the discharged waste on the system are analyzed. The aim is to evaluate the sustainability of the park's circular economy development and make relevant development proposals. The results show that the primary industry in the park is dominant, and the economic development is highly dependent on the external raw materials and energy. The output emergy value is 42.05% of the total input emergy value, the emergy per-person value (EPP) is 5.04×10^16 sej/person, emergy per-area (EPA) is 6.96×10^12 m^2. The overall economic development is better, but the development of the secondary and tertiary industries is weak;the park's emergy investment ratio (EIR)) is 8.06, the emergy yield ratio (EYR) is 1.12, and the emergy reuse rate (ERR) is 29.27%. The resource utilization shows high external dependence, the overall resource reuse degree is low, and the use of its own resources. There is still much room for improvement in production efficiency;the emergy loading ratio (ELR) of the park is 8.11, the emergy waste ratio (EWR) is 11.57%, the waste utilization ratio (WUR) is 69.61%, the pressure of production activities on the environment is at a moderate level, and there is a certain waste recycling industry, but the overall utilization is limited;the emergy sustainable index (ESI) is 1.61, the sustainable development index (SDI) is 3.42, and the urban eco-efficiency index (UEI) is 0.88. The economic system is simple in level, the industrial structure is relatively simple, and there are still some shortcomings in self-organization ability, development potential and recycling capacity. The sustainable development performance needs to be improved. The industrial structure is relatively simple and is not balanced, and the utilization and resource efficiency of existing industries is low, which limits the further development of the park. It is recommended that the park further develops internal resources, improves resource utilization, increases system strength, adjusts the industrial structure of the park, coordinates industrial development, and enhances production efficiency. This is also useful for the evaluation of the development of circular economy in other agricultural parks in China.
作者
田宜水
姚一晨
宋成军
刘天池
董强
员学锋
Tian Yishui;Yao Yichen;Song Chengjun;Liu Tianchi;Dong Qiang;Yuan Xuefeng(Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Key Laboratory of Energy ResourceUtilization from Agriculture Waste, Ministry of Agriculture, Beijing 100125, China;The School of Earth Science and Resources,Chang’an University, Xi’an 710054, China;Rural Energy & Environment Agency, Ministry of Agriculture, Beijing 100126, China;Tianshui National Agricultural Science and Technology Park Management Committee, Tianshui 741030, China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2019年第4期241-247,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
"十二五"国家科技支撑计划(2015BAL04B05)
关键词
可持续发展
废弃物
能值分析
循环经济
农业循环园区
sustainable development
wastes
emergy analysis
circular economy
circular agricultural park
