干旱区生态环境知识资源中心(Arid): Evaluation of energy balances and greenhouse gas emissions from different agricultural production systems in Minqin Oasis, China

Arid

DOI	10.7717/peerj.6890
	Evaluation of energy balances and greenhouse gas emissions from different agricultural production systems in Minqin Oasis, China
	Yan, Zhengang 1,2; Li, Wei 3; Yan, Tianhai 4; Chang, Shenghua 1; Hou, Fujiang 1
通讯作者	Hou, Fujiang
来源期刊	PEERJ
ISSN	2167-8359
出版年	2019
卷号	7
英文摘要	Agricultural production in Minqin Oasis, China, is commonly categorized as intensive crop production (ICP), integrated crop-livestock production (ICLP), intensive livestock production (confined feeding) (IFLP), and extensive livestock production (grazing) (EGLP). The objectives of the present study were to use a life cycle assessment technique to evaluate on-farm energy balances and greenhouse gas (GHG) emissions of agricultural production, and to compare the differences among the four systems. Data used in the present study were collected from published literature and face-to face questionnaires from 529 farms in eight towns (two towns per production system) within Minqin county. The ANOVA of averaged data from 2014 to 2015 indicated that the net energy ratio (Output/Input) for the EGLP system was significantly higher than that for any other system (P < 0.01), whereas the difference among other three systems were not significant. The EGLP system generated lower CO2-eq emissions per hectare of farmland than other systems (P < 0.01). Relating carbon economic efficiency to market values (US$) of agricultural products, indicated that the carbon economic efficiency (US$/kg CO2-eq) of the IFLP system was significantly greater than that of other systems (P < 0.01). The major GHG emission sources varied across the systems, that is, soil respiration is the dominant source in EGLP, while the main sources in IFLP are enteric methane and manure management; in ICLP major sources are enteric methane, soil respiration and fertilizer; and in ICP are soil respiration and fertilizer. The structural equation modelling analysis showed that livestock category was strongly linked to net income. The direct effects and total effects of water use efficiency, via its positive influence on energy balances and GHG emissions were much stronger than those of other dependent variables. The study provides important benchmark information to help develop sustainable agricultural production systems on energy balances and GHG emissions in northwestern China.
英文关键词	Minqin Oasis Energy balances Greenhouse gas emissions Life cycle assessment
类型	Article
语种	英语
国家	Peoples R China ; North Ireland
开放获取类型	Green Published, gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000472834300001
WOS关键词	CARBON FOOTPRINT ; USE EFFICIENCY ; WHEAT PRODUCTION ; MILK-PRODUCTION ; SEQUESTRATION ; DAIRY ; SUSTAINABILITY ; MANAGEMENT
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217910
作者单位	1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Key Lab Grassland Livestock Ind Innovat, State Key Lab Grassland Agroecosyst,Minist Agr, Lanzhou, Gansu, Peoples R China; 2.Gansu Agr Univ, Coll Informat & Sci Technol, Lanzhou, Gansu, Peoples R China; 3.Gansu Agr Univ, Coll Finance & Econ, Lanzhou, Gansu, Peoples R China; 4.Agrifood & Biosci Inst, Hillsborough, North Ireland
推荐引用方式 GB/T 7714	Yan, Zhengang,Li, Wei,Yan, Tianhai,et al. Evaluation of energy balances and greenhouse gas emissions from different agricultural production systems in Minqin Oasis, China[J]. 兰州大学,2019,7.
APA	Yan, Zhengang,Li, Wei,Yan, Tianhai,Chang, Shenghua,&Hou, Fujiang.(2019).Evaluation of energy balances and greenhouse gas emissions from different agricultural production systems in Minqin Oasis, China.PEERJ,7.
MLA	Yan, Zhengang,et al."Evaluation of energy balances and greenhouse gas emissions from different agricultural production systems in Minqin Oasis, China".PEERJ 7(2019).