Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches
Quan, Q; He, NP; Zhang, Z; Zhang, YH; Gao, Y
2015
Source PublicationECOLOGICAL ENGINEERING
ISSN0925-8574
Volume75Pages:172-177
AbstractA rapid increase in grazing intensity since the 1980s has caused large areas of the Inner Mongolian grasslands to become degraded. Increasing atmospheric nitrogen (N) deposition might exert an important influence on vegetation restoration in these degraded grasslands by increasing available N and relieving N limitations on productivity. However, no previous studies have tested the assumption that increasing N deposition promotes vegetation restoration in degraded grasslands. By conducting a 4-year field restoration experiment with four N addition treatments (0, 5, 10, and 20 g Nm (2) year (1)) and two grazing treatments (grazed and ungrazed), we investigated the effects of N enrichment and grazing on the restoration of patches in which vegetation had been degraded. N addition significantly accelerated the restoration of vegetation-degraded grassland patches regarding both plant cover and diversity. Moderate grazing also promoted the restoration of degraded-vegetation patches in term of both plant diversity and species similarity. Importantly, the positive effects of N addition on the restoration of degraded patches may be augmented by grazing. This study demonstrate that low levels of N enrichment (or increasing atmospheric N deposition) positively impact vegetation restoration in degraded grassland patches, particularly under moderate grazing practices. Our findings provide new insights into the management of severely degraded grasslands through the regulation of N inputs and grazing practices. (C) 2014 Elsevier B.V. All rights reserved.
SubtypeJournal
KeywordDegradation Grazing Nitrogen deposition Restoration Species richness
Subject AreaEnvironmental Sciences & Ecology ; Engineering
WOS Subject ExtendedEcology ; Engineering, Environmental ; Environmental Sciences
WOS KeywordINNER MONGOLIAN STEPPE ; SEMIARID GRASSLAND ; LEYMUS-CHINENSIS ; CALIFORNIA GRASSLAND ; ECOSYSTEM RESPONSES ; SPECIES-DIVERSITY ; PLANT-COMMUNITIES ; SEED DISPERSAL ; NORTHERN CHINA ; USE-EFFICIENCY
Indexed BySCI
Language英语
WOS IDWOS:000349598200022
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44455
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Quan, Q,He, NP,Zhang, Z,et al. Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches[J]. ECOLOGICAL ENGINEERING,2015,75:172-177.
APA Quan, Q,He, NP,Zhang, Z,Zhang, YH,&Gao, Y.(2015).Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches.ECOLOGICAL ENGINEERING,75,172-177.
MLA Quan, Q,et al."Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches".ECOLOGICAL ENGINEERING 75(2015):172-177.
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