Effects of nutrient addition on degraded alpine grasslands of the Qinghai-Tibetan Plateau: A meta-analysis
Wang, Dangjun; Zhou, Huakun; Yao, Buqing; Wang, Wenying; Dong, Shikui; Shang, Zhanhuan; She, Yandi; Ma, Li; Huang, Xiaotao; Zhang, Zhonghua; Zhang, Qian; Zhao, Fengyu; Zuo, Juan; Mao, Zhun
AbstractClimate warming and human disturbance are supposed to have severely affected the alpine grasslands on the Qinghai-Tibetan Plateau (QTP), a region where the extremely harsh and fragile ecological environment has attracted great attention because of its sensitivity to global change. However, there is still no unified understanding of the degree and magnitude of grassland degradation and the effectiveness of nutrient addition in this vast landscape, since most previous studies have focused on short-term observations at a single site. Here, we conducted a meta-analysis of 145 published studies on degraded alpine grassland along with 90 published studies, which concerning nutrient addition (nitrogen [N], phosphorus [P], and combined N and P [NP]) to quantitatively assess the responses of plant and soil characteristics to land degradation and restoration. Our results revealed that the response ratio (RR) of above-ground biomass (AGB), below-ground biomass (BGB), soil organic carbon (SOC), and soil total N (TN) decreased significantly (- 47.23 %, -43.45 %, -32.35 %, and - 37.97 %, respectively) in degraded grassland compared with non-degraded grassland. The RR of AGB was correlated with mean annual precipitation (MAP), while the RR of BGB was correlated with the interaction of MAP and mean annual temperature (MAT). Severely degraded grassland required additional nutrients to aid recovery. NP addition to severely degraded sites increased plant AGB (+32.44 %), TN (+ 10.99 %), soil total P (+ 32.25 %), and soil moisture (+ 9.21 %), but significantly decreased species richness (-45.46 %), diversity (- 30.40 % for Shannon- Wiener index) and soil pH (- 3.91 %). N addition increased the RR of AGB and grass biomass significantly by 28.77 % and 36.49 %, but had no significant effect on sedge and forb biomass. MAP influenced the RR of AGB, TN, TP under NP addition, the RR of BGB and the AGB of different function groups were significantly affected by MAT. We evidenced that the QTP has endured severe vegetation and soil degradation, which cannot be completely mitigated by supplementary fertilisation. Fertilisation could yield positive effects on plant performance and soil quality, but negative effects on biodiversity. Climate warming and associated precipitation change may regulate the effects of fertiliser on plant biomass and soil nutrients.
KeywordQinghai-Tibetan Plateau Grassland degradation Soil quality Biodiversity Fertilisation Meta-analysis
Document Type期刊论文
Recommended Citation
GB/T 7714
Wang, Dangjun,Zhou, Huakun,Yao, Buqing,et al. Effects of nutrient addition on degraded alpine grasslands of the Qinghai-Tibetan Plateau: A meta-analysis[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2020,301.
APA Wang, Dangjun.,Zhou, Huakun.,Yao, Buqing.,Wang, Wenying.,Dong, Shikui.,...&Mao, Zhun.(2020).Effects of nutrient addition on degraded alpine grasslands of the Qinghai-Tibetan Plateau: A meta-analysis.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,301.
MLA Wang, Dangjun,et al."Effects of nutrient addition on degraded alpine grasslands of the Qinghai-Tibetan Plateau: A meta-analysis".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 301(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Dangjun]'s Articles
[Zhou, Huakun]'s Articles
[Yao, Buqing]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Dangjun]'s Articles
[Zhou, Huakun]'s Articles
[Yao, Buqing]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Dangjun]'s Articles
[Zhou, Huakun]'s Articles
[Yao, Buqing]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.