基于能值理论的农田&#x02014;畜禽生产系统可持续动态

doi:10.31497/zrzyxb.20200410

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自然资源学报 ›› 2020, Vol. 35 ›› Issue (4) : 869-883. DOI: 10.31497/zrzyxb.20200410

研究论文

基于能值理论的农田—畜禽生产系统可持续动态

黄黄¹, 时宇¹, 冉珊珊¹, 苏海蓉¹, 刘金娥^1,2

作者信息 +

Dynamic research on sustainable development of farmland-livestock production system based on emergy theory

HUANG Huang¹, SHI Yu¹, RAN Shan-shan¹, SU Hai-rong¹, LIU Jin-e^1,2

Author information +

文章历史 +

摘要

为了解我国东南丘陵山区农业生产动态及其可持续性,以福建典型山区德化县为例,构建废弃物能值比例、环境污染能值负产出等指标,运用能值理论定量分析德化县2007—2016年农田—畜禽生产系统投入产出、环境负荷及可持续性的变化。结果表明：德化县农田—畜禽生产系统能值投入以购买能值为主,占能值总投入的68%~79%,水资源能值约占21%~31%;畜禽子系统能值产出占72%以上;能值密度在2.68×10¹²~3.33×10¹² sej·m^-2之间波动上升,净能值产出率下降40%,环境负荷明显加重,2015年以来有所减轻;可持续发展指数在2007—2010年短暂上升后快速下降,由1.14降至0.42。从构建的指标来看,系统废弃物能值比例有所下降,环境污染能值产出减少约22%,综合经济效益和废弃物利用情况,近年来可持续发展状况逐渐好转。德化县目前正处于农田—畜禽系统产出结构调整期,应增加系统内部反馈能值用量,控制化肥、饲料投入,提高废弃物利用率,以实现可持续发展。

Abstract

To understand the agricultural production dynamics and sustainability in the hilly areas of southeast China, this paper took Dehua county, a typical mountainous area in Fujian province, as an example to quantitatively analyze the changes of input, output, environmental load and sustainability of farmland-livestock systems from 2007 to 2016, and constructed the indicators of waste emergy ratio and environmental pollution emergy negative output. The results showed that the input of the farmland-livestock system in the study area was mainly based on the purchasing emergy, accounting for 68%-79% of the total emergy input, and the emergy of water resources accounted for 21%-31%. The emergy output of livestock systems accounted for more than 72% of the total output. And the emergy density fluctuated between 2.68×10¹² and 3.33×10¹² sej·m^-2, and emergy per person increased from 1.23×10¹⁶ sej to 1.72×10¹⁶ sej. The net emergy yield ratio decreased by 40%, and the environmental load increased significantly, which could have been maintained since 2015. The emergy sustainability index fell rapidly from 1.14 to 0.42 after a brief rise in 2007-2010. From the indicators of construction, the proportion of system waste emergy decreased, and environmental pollution emergy output decreased by about 22%. In terms of comprehensive economic benefits and waste utilization, the sustainable development of Dehua county has gradually improved in recent years. Dehua county is currently adjusting its output structure of farmland-livestock system. It should increase the amount of feedback emergy in the system, control fertilizer and feed input, and improve waste utilization to achieve sustainable development.

导出引用

黄黄, 时宇, 冉珊珊, 苏海蓉, 刘金娥. 基于能值理论的农田—畜禽生产系统可持续动态[J]. 自然资源学报, 2020, 35(4): 869-883 https://doi.org/10.31497/zrzyxb.20200410

HUANG Huang, SHI Yu, RAN Shan-shan, SU Hai-rong, LIU Jin-e. Dynamic research on sustainable development of farmland-livestock production system based on emergy theory[J]. JOURNAL OF NATURAL RESOURCES, 2020, 35(4): 869-883 https://doi.org/10.31497/zrzyxb.20200410

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