| 县域农业系统资源综合利用的能值评价——以广东梅县为例 |
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| 引用本文： | 陈建国,罗文,凌立文,余平祥,毛小娟,曹咏,罗晓燕.县域农业系统资源综合利用的能值评价——以广东梅县为例[J].湖南农业大学学报(自然科学版),2013,39(3):304-309. |
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| 作者姓名： | 陈建国 罗文 凌立文 余平祥 毛小娟 曹咏 罗晓燕 |
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| 作者单位： | 华南农业大学,华南农业大学,华南农业大学,华南农业大学,华南农业大学,华南农业大学,华南农业大学 |
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| 基金项目： | 教育部人文社科规划基金项目(11YJAZH010) |
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| 摘 要： | 以广东梅县农业系统为研究对象，以种植业与畜牧业之间的资源综合利用为核心约束，构建农业结构优化模型、购买能值节约估算模型、货币能值增益估算模型，对农业系统资源综合利用效果进行能值评价。结果表明：2004—2008年，种养间资源综合利用能明显改变梅县的农业结构，年均货币能值增加(2.15E+21)sej，年均能值交换率从2.57增为4.42，年均环境负载率由0.62降为0.17，年均可持续发展指数从9.27增为43.52。梅县农业资源综合利用既能降低环境负载率，又能提高能值交换率，促进农业可持续发展。
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| 关 键 词： | 农业资源 能值评价 农业结构优化 广东梅县 |
| 收稿时间： | 2012/12/10 0:00:00 |
| 修稿时间： | 2013/3/25 0:00:00 |
Emergy evaluation on comprehensive utilization of resources in countywideagricultural system: A case study of Meixian county, Guangdong |
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| Chen Jian-guo,and.Emergy evaluation on comprehensive utilization of resources in countywideagricultural system: A case study of Meixian county, Guangdong[J].Journal of Hunan Agricultural University,2013,39(3):304-309. |
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| Authors: | Chen Jian-guo and |
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| Institution: | South China Agricultural University,,,,,, |
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| Abstract: | By taking the agricultural system in Meixian county of Guangdong province as research object, using the comprehensive utilization of planting and livestock husbandry resources as core constraint condition, constructing agricultural structure optimization model, estimation model of saved purchase emergy, estimation model of increased monetary emergy, the effect of resources comprehensive utilization was assessed based on emergy evaluation approach. The results showed that from 2004 to 2008 the agricultural structure of Meixian county was significantly changed by the comprehensive utilization of planting and livestock husbandry resources. The change of agricultural structure would increase (2.15E+21) sej annual mean monetary emergy. The annual mean emergy exchange ratio increased from 2.57 to 4.42 and the annual mean environment load ratio decreased from 0.62 to 0.17, and the annual mean emergy index for sustainable development increased from 9.27 to 43.52. In conclusion, implementing the comprehensive utilization of resources in Meixian county could decrease environment load ratio and increase emergy exchange ratio, so it could greatly promote agricultural sustainable development. |
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| Keywords: | Key words: agricultural resources emergy evaluation agricultural structure optimization Meixian in Guangdong |
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