| 摘要: |
| 为全面评价设施葡萄生产系统的经济效益、生态效益和可持续发展水平,利用能值分析方法,基于大量统计数据和调研数据,以露地栽培作为对照,对设施葡萄栽培系统的能值消耗总量、结构和主要能值分析指标进行了研究.结果表明:1)设施葡萄生产系统的能值投入总量为5.32×1016 sej/(hm2·a),高于露地栽培;2)设施和露地这2种葡萄生产系统的能值消耗均以不可更新购入能值为主,且对购入能值的依赖强于自然资源能值,对不可更新资源能值的依赖强于可更新资源能值;3)与露地栽培相比,设施葡萄生产系统的能值自给率和产出率偏低,能值投资率和环境负载率偏高,可持续发展能力降低.设施葡萄生产系统的环境负载较高,应降低购入性能值消耗、改进系统内部资源反馈效率,以提高系统的可持续性水平. |
| 关键词: 能值分析 可持续评价 设施葡萄 农业生产系统 |
| DOI：10.11841/j.issn.1007-4333.2015.03.31 |
| 投稿时间：2014-07-10 |
| 基金项目:国家自然科学基金资助项目(50841101573); 国家葡萄产业技术体系(CARS-30) |
|
| Emergy-based sustainability assessment for protected grape cultivation system |
|
FENG Jian-ying1, MU Wei-song1, TIAN Dong1, FU Ze-tian2
|
| (1.College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China;2.College of Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| In order to assess the economic benefit,ecological benefit and sustainability in protected grape cultivation system,a methodology of emergy analysis was adopted to research the emergy accounting,emergy structure and emergy-based indicators for protected viticulture system.The data was acquired through statistical data and field investigation,and the open-field viticulture system was chosen to conduct the comparative study.The results indicate that the total emergy input in protected grape cultivation is 5.32×1016 sej/(hm2·a),which is higher than the open-field system.The emergy consumption in both grape production systems are characterized by more heavily dependent on the purchased emergy and nonrenewable resource emergy.Compared to the open-field cultivation,the protected grape system has lower emergy self-sufficiency rate and emergy yield ratio,higher emergy investment rate and environmental loading ratio,and lower emergy sustainability index.The environmental loding in protected grape cultivation system is relative higher;it should reduce the purchased emergy and increase the feedback efficiency of internal resources,so as to improve the sustainability of the system. |
| Key words: emergy analysis sustainability assessment protected grape cultivation agricultural production system |
