气候变化领域集成服务门户(CCPortal): Responses of carbon transfer, partitioning, and residence time to land use in the plant-soil system of an alpine meadow on the Qinghai-Tibetan Plateau

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DOI	10.1007/s00374-015-1024-1
	Responses of carbon transfer, partitioning, and residence time to land use in the plant-soil system of an alpine meadow on the Qinghai-Tibetan Plateau
	Zhao, Liang; Chen, Dongdong; Zhao, Na; Li, Qi; Cheng, Qian; Luo, Caiyun; Xu, Shixiao; Wang, Shiping; Zhao, Xinquan
通讯作者	Zhao, XQ (通讯作者)
发表日期	2015
ISSN	0178-2762
EISSN	1432-0789
起始页码	781
结束页码	790
卷号	51 期号:7
英文摘要	We conducted an in situ C-13 pulse-labeling experiment from July to September 2011, involving three land use types: native alpine meadow with winter grazing (native meadow), cultivated perennial Elymus nutans (perennial grass), and annual Avena sativa (annual grass) pastures in the Qinghai-Tibetan Plateau. Thirty-two days after labeling, 32, 23, and 43 % of recovered C-13 of native meadow, perennial grass, and annual grass, respectively, were released by shoot respiration, and 43, 34, and 22 % were allocated to belowground C pools. About half of C-13 allocated to belowground C pools was released by soil respiration. Mean residence time of net assimilate C in this ecosystem was 67, 118, and 43 days for native meadow, perennial grass, and annual grass, respectively. Our results imply that species abundance and root/shoot ratio are the major controlling factors of soil C stocks in high-altitude grassland ecosystems, explaining 35 and 73 %, respectively. We suggest that conversion to monoculture for food production on the Qinghai-Tibetan Plateau may deteriorate soil health through rapid loss of soil organic C. The main cause of C transfer reduction after conversion to monoculture is the change in species richness and root/shoot ratio. Together with previous research studies, our results also support the finding that moderate grazing benefits grassland C transfer and stock, owing to higher species richness and root/shoot ratio.
关键词	GRAZING INTENSITY CO2 EXCHANGE RHIZOSPHERE RESPIRATION GRASSLAND MANAGEMENT C-14 RHIZODEPOSITION ATMOSPHERE DIVERSITY
英文关键词	Qinghai-Tibetan Plateau; Alpine meadow; Land use; Carbon transfer; C-13 pulse labeling
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000361348100002
来源期刊	BIOLOGY AND FERTILITY OF SOILS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258445
推荐引用方式 GB/T 7714	Zhao, Liang,Chen, Dongdong,Zhao, Na,et al. Responses of carbon transfer, partitioning, and residence time to land use in the plant-soil system of an alpine meadow on the Qinghai-Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,51(7).
APA	Zhao, Liang.,Chen, Dongdong.,Zhao, Na.,Li, Qi.,Cheng, Qian.,...&Zhao, Xinquan.(2015).Responses of carbon transfer, partitioning, and residence time to land use in the plant-soil system of an alpine meadow on the Qinghai-Tibetan Plateau.BIOLOGY AND FERTILITY OF SOILS,51(7).
MLA	Zhao, Liang,et al."Responses of carbon transfer, partitioning, and residence time to land use in the plant-soil system of an alpine meadow on the Qinghai-Tibetan Plateau".BIOLOGY AND FERTILITY OF SOILS 51.7(2015).