Evaluation on construction and optimization of modern agro-pastoral circular system based on emergy analysis

PDF HTML阅读 XML下载 导出引用 引用提醒 基于能值分析评估现代农牧循环系统的构建与优化 DOI: 10.5846/stxb202112133528 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 江苏省自然科学基金项目(BK20190169);苏州市社会科学基金项目(决策咨询类)(J2022LX007);苏州市科技计划项目(ST202228) Evaluation on construction and optimization of modern agro-pastoral circular system based emergy analysis Author: Affiliation: Fund Project: The Natural Science Foundation Jiangsu Province (Grant No. BK20190169); Social Suzhou City J2022LX007); Technology Planning Project ST202228) 摘要 | 图/表 访问统计 参考文献 相似文献 引证文献 资源附件 文章评论 摘要:发展现代循环农业有助于推动农业生产方式高质量转型,是实现农业可持续发展的重要路径之一。但生产经营者在构建循环农业系统的过程中,因缺乏精确的参数测算,常存在投入产出不明、循环效率偏低、整体评估缺乏等问题,导致现代循环农业系统的物能高效运转面临阻碍。以江苏省太仓市东林村的现代农牧循环系统为对象,在四维时空尺度上界定系统边界并绘制能流图,全面梳理了案例系统全年运转过程中的投入与产出项目。现代"草-羊-田"农牧循环全系统由粮食种植、饲料加工、湖羊养殖与羊粪堆肥4个亚系统构成。通过模拟亚系统逐步结合、系统循环与优化调控的演进过程,采用能值分析方法对农牧系统不同构建阶段的亚系统与全系统的能值投入产出和结构进行定量评估与对比研究。结果表明,在农牧系统产业链逐步构建直至循环生产的过程中,全系统的总能值投入随各亚系统的扩增而有明显增加,系统的物能内部流通率逐渐升高。随后,以废弃物的系统内部消纳为目标,通过强化亚系统间的耦合对现状循环进行优化调控,系统所需的总能值投入有大幅减少,且各亚系统对本地资源的利用程度有明显提升。实证研究定量评估了现代农牧循环系统构建与优化过程中的能值投入与资源利用状况,为系统的高效循环运行提供参数支持,可为循环农业系统的科学构建与模式的复制推广提供精准指导。 Abstract:Developing agriculture is helpful to promote the high-quality transformation agricultural production mode in China, which one important ways realize sustainable development. However, when operators applied model particular construction, there often occurred problems such as unknown input output, low circulation efficiency lack overall evaluation, led obstacles for efficient operation material-energy utilization systems. In this study, "straw-sheep-cropland" Donglin Village was selected research object, due its typical representativeness agriculture. whole consisted 4 subsystems cereal cropping, feed producing, sheep raising manure composting. On four-dimensional spatial-temporal scale, boundary defined by drawing flow diagram. Hence output items case were comprehensively sorted out covering entire year operation. basis, aiming simulate gradual progress combination, optimal regulation, development stages set separate cropping raising, connective (by producing or composting), present circular, optimized circular. Then, input-output structure along with different quantitatively evaluated comparatively studied analysis. results showed that gross subsystem largest among at stage, designed scale needed a large amount corresponding resources purchased straw be invested. Meanwhile, unit value mutton from highest role consumer ecosystem. During process constructing industrial chain step until circulating production, increased obviously augmentation subsystems, so did internal rate construction. Subsequently, targeted intra-system absorption waste, optimally regulated strengthening coupling level between subsystems. At required lower consumed less external economic resource, demonstrated better consumption characteristic. And recycling planting breeding waste well self-sustaining within resulted significant enhancement local degree each subsystem. meantime, values effective products by-products produced stage all increased, mainly account higher driving adding extra material, energy information. This study resource during empirical could not only provide parameter support system, but also supply accurate guidance scientific replicated promotion