气候变化领域集成服务门户(CCPortal): Impact of grassland contract policy on soil organic carbon losses from alpine grassland on the Qinghai-Tibetan Plateau

CCPortal

DOI	10.1111/sum.12387
	Impact of grassland contract policy on soil organic carbon losses from alpine grassland on the Qinghai-Tibetan Plateau
	Cao, J.; Gong, Y.; Yeh, E. T.; Holden, N. M.; Adamowski, J. F.; Deo, R. C.; Liu, M.; Zhou, J.; Zhang, J.; Zhang, W.; Zhang, S.; Sheng, D.; Yang, S.; Xu, X.; Li, M.; Feng, Q.
发表日期	2017
ISSN	0266-0032
EISSN	1475-2743
起始页码	663
结束页码	671
卷号	33 期号:4
英文摘要	Carbon storage in the soils on the Qinghai-Tibetan Plateau plays a very important role in the global carbon budget. In the 1990s, a policy of contracting collective grasslands to smaller units was implemented, resulting in a change from the traditional collective grassland management to two new management patterns: a multi-household management pattern (MMP: grassland shared by several households without enclosures) and a single-household management pattern (SMP: grassland enclosed and used by only one household). In 2016, 50 MMP and 54 SMP winter pastures on the Qinghai-Tibetan Plateau were sampled to assess the differences in soil organic carbon (SOC) between the two management patterns. Results showed that average SOC was significantly greater under MMP than under SMP, with an estimated 0.41 MgC/ha/yr lost due to SMP following the new grassland contract. Based on the government's grassland policy, four grassland utilization scenarios were developed for both summer and winter pastures. We found that if the grassland were managed under SMP, likely C losses ranged between 0.31x10(7) and 6.15x10(7) Mg C/yr across the Qinghai-Tibetan Plateau relative to MMP, which more closely resembles pre-1990s grassland management. Previous estimates of C losses have only considered land use change (with cover change) and ignored the impacts driven by land management pattern changes (without cover change). The new data suggest that C losses from the Qinghai-Tibetan Plateau are greater than previously estimated, and therefore that the grassland contract policy should be reviewed and SMP households should be encouraged to reunite into the MMP. These findings have potential implications for land management strategies not only on the Qinghai-Tibetan Plateau but also other grazing regions globally where such practices may exist.
英文关键词	land use policy; grazing management; carbon storage; trampling; global carbon cycle; policy scenarios
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS关键词	RANGELAND DEGRADATION ; LAND DEGRADATION ; SLOPE ASPECT ; STOCKS ; MANAGEMENT ; CLIMATE ; SEQUESTRATION ; STEPPE ; BASIN
WOS记录号	WOS:000418422500018
来源期刊	SOIL USE AND MANAGEMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239369
作者单位	[Cao, J.; Gong, Y.; Liu, M.; Zhou, J.; Zhang, J.; Sheng, D.; Yang, S.; Xu, X.; Li, M.] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Gansu, Peoples R China; [Yeh, E. T.] Univ Colorado Boulder, Dept Geog, Campus Box 260, Boulder, CO 80309 USA; [Holden, N. M.] Univ Coll Dublin, Sch Biosyst & Food Engn, Agr & Food Sci Ctr, Dublin 4, Ireland; [Adamowski, J. F.] McGill Univ, Dept Bioresource Engn, Fac Agr & Environm Sci, Quebec City, PQ H9X 3V9, Canada; [Deo, R. C.] Univ Southern Queensland, Inst Agr & Environm, Sch Agr Computat & Environm Sci, Int Ctr Appl Climate Sci, Springfield, Qld 4300, Australia; [Deo, R. C.; Feng, Q.] Chinese Acad Sci, Cold & Arid Reg Environm Engn Res Inst, Key Lab Ecohydrol Inland River Basin, Alashan Desert Ecohydrol Expt Res Stn, Lanzhou 73000, Gansu, Peoples R China; [Zhang, W.] Northwest Normal Univ, Coll Chem Engn, Lanzhou 730070, Gansu, Peoples R China; [Zhang, S.] Northwest Normal Univ, Coll Life Sci, Lanzhou 730070, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cao, J.,Gong, Y.,Yeh, E. T.,et al. Impact of grassland contract policy on soil organic carbon losses from alpine grassland on the Qinghai-Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2017,33(4).
APA	Cao, J..,Gong, Y..,Yeh, E. T..,Holden, N. M..,Adamowski, J. F..,...&Feng, Q..(2017).Impact of grassland contract policy on soil organic carbon losses from alpine grassland on the Qinghai-Tibetan Plateau.SOIL USE AND MANAGEMENT,33(4).
MLA	Cao, J.,et al."Impact of grassland contract policy on soil organic carbon losses from alpine grassland on the Qinghai-Tibetan Plateau".SOIL USE AND MANAGEMENT 33.4(2017).