Community-based seasonal movement grazing maintains lower greenhouse gas emission intensity on Qinghai-Tibet Plateau of China
Community-based seasonal movement grazing maintains lower greenhouse gas emission intensity on Qinghai-Tibet Plateau of China
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青藏高原社区季节性移动放牧保持较低温室气体排放强度
DOI：
10.1016/j.landusepol.2019.03.032
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发表时间：
2019-06
期刊：
影响因子：
7.1
通讯作者：
Li Wenjun
中科院分区：
文献类型：
--
作者：
Zhuang Minghao;Gongbuzeren;Zhang Jian;Li Wenjun
全球畜牧业提供生态系统产品和服务，但也排放7.1 Gt CO2当量。温室气体（GHG）。为降低温室气体排放强度，应确定适当的生产管理系统。20世纪80年代以来，在草原家庭承包制政策的推动下，我国的草原畜牧业逐步由以放牧为主转变为以个体户经营为主。然而，很少有人知道这一转变如何影响温室气体排放。在青藏高原若尔盖县选取了2个代表2种不同草地管理模式的样地，即1）以围栏为界的个人利用草地的全年连续放牧模式和2）以社区为基础的全草地共同利用的季节性放牧模式。其目的是使用生命周期评估（LCA）研究两种系统之间的温室气体排放强度的差异。结果表明，从以社区为基础的季节性放牧过渡到以家庭为基础的连续放牧，温室气体排放强度从-0.62 kgCO 2-eq/kg肉增加到10.51 kgCO 2-eq/kg肉。这一增长主要归因于土壤碳储量的变化。研究结果表明，为了最大限度地减少温室气体排放和环境退化，在青藏高原牧区应该保持以社区为基础的季节性放牧。通过采取适当的做法加强土壤固碳，将进一步减少畜牧业系统产生的温室气体排放强度。
Global livestock husbandry provides ecosystem goods and services but also emits 7.1 Gt CO2-eq. of greenhouse gases (GHGs) per year. To lower GHG emissions intensity, appropriate production management systems should be identified. Since the 1980s, grassland livestock husbandry in China has transformed gradually from pastoralism into individual household management under the Grassland Household Contract System Policy. However, little is known about how this transition influences GHG emissions. We selected two case study sites representing two different forms of rangeland management systems in Ruoergai county of the Qinghai-Tibet Plateau, viz. 1) household-based all year continuous grazing under the individual use of rangeland with fences demarcating boundaries; 2) community-based seasonal grazing under the common use of the whole rangeland. The objective was to examine the differences in greenhouse gas emission intensity between the two systems using life cycle assessment (LCA). The results showed that the transition from community-based seasonal grazing into household-based continuous grazing increased the GHG emissions intensity from -0.62 kgCO2-eq/kg meat to 10.51 kgCO2-eq/kg meat. The increase was primarily attributed to changes in soil carbon storage. Findings suggest that to minimize GHG emissions and environmental degradation, community-based seasonal grazing in the pastoral area of Qinghai-Tibet Plateau should be maintained. Enhancing soil carbon sequestration by adopting appropriate practices would further reduce the GHG emissions intensity arising from the livestock system.
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影响因子：
2.8
作者：
Junfeng Wang;Genxu Wang;Hongchang Hu;Qingbai Wu
通讯作者：
Junfeng Wang;Genxu Wang;Hongchang Hu;Qingbai Wu
影响因子：
1.2
作者：
L. Kahn;J. Earl;M. Nicholls
通讯作者：
L. Kahn;J. Earl;M. Nicholls
影响因子：
4.6
作者：
Chen W;Huang D;Liu N;Zhang Y;Badgery WB;Wang X;Shen Y
通讯作者：
Shen Y
影响因子：
6.6
作者：
Henderson, Benjamin B.;Gerber, Pierre J.;Conant, Richard T.
通讯作者：
Conant, Richard T.
影响因子：
11.1
作者：
de Figueiredo, Eduardo Barretto;Jayasundara, Susantha;La Scala, Newton, Jr.
通讯作者：
La Scala, Newton, Jr.