Effects of rotational and continuous overgrazing on newly assimilated C allocation

doi:10.1007/s00374-020-01516-2

	Effects of rotational and continuous overgrazing on newly assimilated C allocation
	Liu, Min 2,3,4,5; Ouyang, Shengnan 2,3; Tian, Yuqiang 2,3; Wen, Shuhai 2,3,4,5; Zhao, Yan 2,3; Li, Xiaobing 2,3; Baoyin, Taoge-tao 6; Kuzyakov, Yakov 1; Xu, Xingliang 4,7
刊名	BIOLOGY AND FERTILITY OF SOILS
	2020-10-20
页码	10
关键词	C-13 pulse labeling Belowground C allocation Overgrazing Newly assimilated C Soil organic matter Temperate grassland
ISSN号	0178-2762
DOI	10.1007/s00374-020-01516-2
通讯作者	Tian, Yuqiang(tyq@bnu.edu.cn) ; Xu, Xingliang(xuxingl@hotmail.com)
英文摘要	In situ(13)CO(2)pulse labeling was conducted in temperate grasslands, managed by no grazing, rotational, or continuous overgrazing, to trace the allocation pattern and the dynamics of newly assimilated C into the plant-soil system. Forty-eight days after the labeling, the belowground(13)C allocations under overgrazing were substantially lower than those under no grazing (55% for no grazing, 29% for rotational grazing, 36% for continuous grazing). Overgrazing reduced the relative amount of C incorporation into soil organic C (SOC). Overgrazing led to more C losses through shoot respiration (23%, 54%, 46% by no, rotational, and continuous grazing, respectively), but fewer losses via soil respiration (33%, 12%, 13% by no, rotational, and continuous grazing, respectively). Continuous grazing produced more C allocation to roots than rotational grazing (12% vs 4%), indicating that plants had stronger root C storage capacity under continuous than rotational grazing. The mean C residence time of the belowground rhizodeposits and C used for root respiration under rotational grazing (2.08 days) was longer than that under no grazing (1.47 days) or continuous grazing (1.37 days). Overgrazing decreased the C stocks in shoots but remained stable in roots. Meanwhile, overgrazing decreased the newly assimilated C allocation to belowground, creating a negative effect on C sequestration. Under overgrazing regimes, continuous grazing is more preferable in the investigated temperate grasslands than rotational grazing for C allocation and sequestration in soil.
资助项目	National Key Research and Development Program of China[2016YFC0500502] ; National Natural Science Foundation of China[41771325] ; National Natural Science Foundation of China[41877089] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0405] ; National Key Basic Research Program of China[2014CB138803]
WOS关键词	SOIL ORGANIC-CARBON ; QINGHAI-TIBETAN PLATEAU ; GRAZING INTENSITY ; TEMPERATE GRASSLAND ; BIOMASS ALLOCATION ; INNER-MONGOLIA ; MICROBIAL COMMUNITY ; ALPINE MEADOW ; MANAGEMENT ; PLANT
WOS研究方向	Agriculture
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000580467800001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Key Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/157097]
专题	中国科学院地理科学与资源研究所
通讯作者	Tian, Yuqiang; Xu, Xingliang
作者单位	1.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, Busgenweg 2, D-37077 Gottingen, Germany 2.Beijing Normal Univ, Ctr Human Environm Syst Sustainabil CHESS, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Beijing Normal Univ, Sch Nat Resources, Fac Geog Sci, Beijing 100875, Peoples R China 4.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China 6.Inner Mongolia Univ, Sch Ecol & Environm, 235 West Coll Rd, Hohhot 010021, Inner Mongolia, Peoples R China 7.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Min,Ouyang, Shengnan,Tian, Yuqiang,et al. Effects of rotational and continuous overgrazing on newly assimilated C allocation[J]. BIOLOGY AND FERTILITY OF SOILS,2020:10.
APA	Liu, Min.,Ouyang, Shengnan.,Tian, Yuqiang.,Wen, Shuhai.,Zhao, Yan.,...&Xu, Xingliang.(2020).Effects of rotational and continuous overgrazing on newly assimilated C allocation.BIOLOGY AND FERTILITY OF SOILS,10.
MLA	Liu, Min,et al."Effects of rotational and continuous overgrazing on newly assimilated C allocation".BIOLOGY AND FERTILITY OF SOILS (2020):10.