Forbs dominate plant nutrient resorption of plant community along a 34-year grazing exclusion gradient in a semiarid grassland

doi:10.1016/j.ecoleng.2021.106497

	Forbs dominate plant nutrient resorption of plant community along a 34-year grazing exclusion gradient in a semiarid grassland
	Zhang, Yi 1; Su, Jishuai 2; Jing, Guanghua 3; Cheng, Jimin 1
	2022
发表期刊	ECOLOGICAL ENGINEERING
ISSN	0925-8574
卷号	175
摘要	Grazing exclusion has been commonly used to restore degraded grasslands and has shown positive effects on plant community structure, productivity, and soil properties. Nutrient resorption affects key ecosystem processes such as nutrient uptake and carbon cycling, and plays a key role in plants' nutrient conservation in nutrient-poor environments. However, how plant nutrient resorption varying with grazing exclusion duration remains unclear. In this study, leaf nitrogen (N) and phosphorus (P) resorption efficiencies were examined at plant functional group and community levels in grasslands along a 34-year grazing exclusion gradient. Along the grazing exclusion gradient, N resorption efficiency (NRE) of plant community remained unchanged, while P resorption efficiency (PRE) increased, accompanied with increased community biomass, the proportion of grasses and soil fertility. Nutrient concentrations and resorption efficiencies, as well as their responses to grazing exclusion, varied among plant functional groups. Both NRE and PRE were higher in grasses than in sedges or forbs, while forbs had higher N and P concentrations in both green and senesced leaves. NRE and PRE of grasses and sedges changed little along the grazing exclusion gradient except the decreased NRE of grasses after 34 years of grazing exclusion, while both NRE and PRE of forbs increased with the duration of grazing exclusion. Variation in community nutrient resorption efficiencies was largely driven by forbs, and nutrient resorption efficiencies were negatively correlated with senesced leaf nutrient concentrations. Nutrient concentrations and resorption efficiencies of different plant functional groups and plant communities varied in their relationships with soil properties. Overall, our study highlights the importance of forbs in plant nutrient use pattern of grassland communities along the grazing exclusion gradient, and offer insights for grassland management to boost ecosystem nutrient cycling.
关键词	Community composition Nitrogen phosphorus ratio Nutrient conservation Plant functional group Soil properties
学科领域	Ecology ; Engineering, Environmental ; Environmental Sciences
DOI	10.1016/j.ecoleng.2021.106497
收录类别	SCI
语种	英语
WOS关键词	SOIL PROPERTIES ; LEAF NUTRIENTS ; LIFE-SPAN ; NITROGEN ; EFFICIENCY ; PATTERNS ; PROFICIENCY ; RESPONSES ; STEPPE ; LEAVES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000728757700003
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6992
资助机构	National Key Research and Development Program of China [2016YFC0500700] ; Chinese Academy of Sciences Field Station Alliance Project [KFJ-SW-YW028-07] ; Natural Science Foundation of Shaanxi Province [2020JQ-971] ; Science and Technology Projects of Shaanxi Academy of Sciences [Y20Z606F13]
作者邮箱	sujishuai@ibcas.ac.cn ; gyzcjm@ms.iswc.ac.cn
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28935
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Shaanxi Acad Sci, Inst Bot Shaanxi Prov, Key Lab Soil Resource & Biotech Applicat, Xian Bot Garden Shaanxi Prov, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yi,Su, Jishuai,Jing, Guanghua,et al. Forbs dominate plant nutrient resorption of plant community along a 34-year grazing exclusion gradient in a semiarid grassland[J]. ECOLOGICAL ENGINEERING,2022,175.
APA	Zhang, Yi,Su, Jishuai,Jing, Guanghua,&Cheng, Jimin.(2022).Forbs dominate plant nutrient resorption of plant community along a 34-year grazing exclusion gradient in a semiarid grassland.ECOLOGICAL ENGINEERING,175.
MLA	Zhang, Yi,et al."Forbs dominate plant nutrient resorption of plant community along a 34-year grazing exclusion gradient in a semiarid grassland".ECOLOGICAL ENGINEERING 175(2022).

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