Combined livestock grazing-exclusion and global warming decreases nitrogen mineralization by changing soil microbial community in a Tibetan alpine meadow

放牧 环境科学 氮气循环 矿化(土壤科学) 微生物种群生物学 农学 生态学 生物 氮气 土壤水分 化学 细菌 遗传学 有机化学
作者
Na Li,Ruiying Chang,Hui Jiang,Akash Tariq,Jordi Sardans,Josep Peñuelas,Feng Sun,Xingmei Zhou
出处
期刊:Catena [Elsevier BV]
卷期号:219: 106589-106589 被引量:13
标识
DOI:10.1016/j.catena.2022.106589
摘要

• Grazing-exclusion significantly decreased soil enzyme activities at around 4000 m altitudes. • Grazing-exclusion significantly decreased alpine meadow root biomass. • Grazing-exclusion and warming significantly increased soil fungal biomass. • Light-intensity grazing is beneficial to potential N mineralization in an alpine meadow. Alpine meadows play a key role in maintaining biodiversity, soil nutrient retention, and herders’ livelihoods in mountain regions. Livestock grazing-exclusion is common in grassland management to protect and promote the sustainable use of alpine meadows. However, there are few studies evaluating the effects of traditional light grazing practices in alpine regions and grazing-exclusion impacts on soil nutrient, especially under conditions of climate warming. In this study, we conducted a five-year grazing-exclusion and warming manipulation experiment to examine the effects of grazing-exclusion on soil nitrogen fractions, microbial communities, and enzyme activities under climate warming. Treatments consisted of light-intensity grazing, grazing-exclusion, and combined grazing-exclusion and warming. Our results showed that grazing-exclusion significantly decreased potential nitrogen mineralization at a 0–5 cm depth and at altitudes of 3850 m, 4000 m, 4150 m, and 4250 m. Combined grazing-exclusion and warming also significantly decreased potential nitrogen mineralization at a 0–5 cm depth and at relatively higher altitudes of 4000 m, 4150 m, and 4250 m. Grazing-exclusion, combined grazing-exclusion and warming all shifted microbial communities from bacteria toward fungi. Grazing-exclusion significantly decreased the relative abundances of phylum Chloroflexi (bacteria) and phylum Ascomycota (fungi), while combined grazing-exclusion and warming significantly increased the relative abundances of phylum Basidiomycota (fungi). The relative abundances of phylum Ascomycota (fungi) demonstrated a positive relationship with potential nitrogen mineralization, but the relative abundances of phylum Basidiomycota (fungi) had a negative relationship with potential nitrogen mineralization. The activities of dehydrogenase and protease in grazing-exclusion and combined grazing-exclusion and warming meadows were lower than those in grazed meadows. Our results demonstrated that in the context of climate change and global warming, grazing-exclusion is unsuitable as a tool for the sustainable management of alpine meadows from soil nitrogen mineralization and fractions point of view. Of concern, climate warming could potentially amplify the adverse effects of grazing-exclusion and causes depletion of soil nutrients in the alpine meadow. This research suggests that a light-intensity grazing (0.5 yak ha −1 year −1 ) is beneficial to increase soil enzyme activity and N mineralization in alpine meadows. Our results provide substantial evidence and a useful baseline and guidance for the sustainable grazing management of alpine meadows as environments change due to climate warming in the future.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
卓若之完成签到 ,获得积分10
1秒前
苯二氮卓完成签到,获得积分10
2秒前
温暖完成签到 ,获得积分10
4秒前
mojomars完成签到,获得积分10
4秒前
时尚雨兰完成签到,获得积分0
5秒前
一叶知秋完成签到,获得积分10
7秒前
叶123完成签到,获得积分10
8秒前
量子星尘发布了新的文献求助10
9秒前
Minicoper发布了新的文献求助10
9秒前
背书强完成签到 ,获得积分10
10秒前
淡然以柳完成签到 ,获得积分10
12秒前
dolabmu完成签到 ,获得积分10
15秒前
崔崔完成签到 ,获得积分10
19秒前
SYLH应助xcxc采纳,获得10
20秒前
wp4455777完成签到,获得积分10
21秒前
十一完成签到,获得积分10
21秒前
ru完成签到 ,获得积分10
23秒前
慧木完成签到 ,获得积分10
23秒前
WW完成签到 ,获得积分10
24秒前
小高同学完成签到,获得积分10
25秒前
轻轻1完成签到,获得积分10
28秒前
29秒前
大橙子发布了新的文献求助10
33秒前
iuhgnor完成签到,获得积分10
36秒前
可夫司机完成签到 ,获得积分10
39秒前
yang完成签到,获得积分10
41秒前
一1完成签到 ,获得积分10
43秒前
jiaolulu完成签到,获得积分10
43秒前
量子星尘发布了新的文献求助10
45秒前
爆米花应助LiZhao采纳,获得10
45秒前
轻轻完成签到,获得积分10
48秒前
Orange应助jiaolulu采纳,获得10
48秒前
xcxc完成签到,获得积分10
50秒前
water应助科研通管家采纳,获得50
50秒前
50秒前
默存完成签到,获得积分10
53秒前
风中的金鱼完成签到 ,获得积分10
55秒前
橙汁完成签到,获得积分10
56秒前
普鲁卡因发布了新的文献求助10
59秒前
cora完成签到 ,获得积分10
1分钟前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038128
求助须知:如何正确求助?哪些是违规求助? 3575831
关于积分的说明 11373827
捐赠科研通 3305610
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022