干旱区生态环境知识资源中心(Arid): Soil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountains

Arid

DOI	10.1038/s41598-021-81120-y
	Soil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountains
	Goenster-Jordan, Sven; Ingold, Mariko; Jannoura, Ramia; Buerkert, Andreas; Joergensen, Rainer Georg
通讯作者	Goenster-Jordan, S (corresponding author), Univ Kassel, Organ Plant Prod & Agroecosyst Res Trop & Subtrop, Steinstr 19, D-37123 Witzenhausen, Germany.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Long-term provision of ecosystem services by grasslands is threatened by increasing stocking densities. The functions of grassland ecosystems depend on a mutual relationship between aboveground and belowground biota. While the effects of increasing stocking density on plant biomass are well studied, little is known about its impact on soil microbial properties. To fill this knowledge gap a grazing experiment was conducted on a summer pasture in the Chinese Altai Mountains during the summers of 2014 and 2015 using a randomized block design with stocking densities of 0, 8, 16, and 24 sheep ha(-1) replicated four times. After two summer grazing periods (each 56 days), topsoil samples (1-7 cm) were taken in September 2015 and analyzed for major physical, chemical, and microbial soil properties. Except for the metabolic quotient (qCO(2); p<0.05), the examined soil properties remained unaffected by the increasing stocking densities, likely due to high spatial variability. The qCO(2) declined from 13.5 mg CO2-C g(-1) microbial biomass C d(-1) at zero grazing to 12.2 mg CO2-C g(-1) microbial biomass C d(-1) at a stocking density of 24 sheep ha(-1). Low values of qCO(2) indicate an aged and dormant microbial community that diverts less soil organic carbon (SOC) to catabolic processes within their cells, characteristic for C limiting conditions. The aboveground biomass affected by grazing intensity correlated positively with SOC (r(s)=0.60, p=0.015) and ergosterol (r(s)=0.76, p=0.001) pointing indirectly to the effect of stocking density. Additionally to the relatively high values of qCO(2), highest values of SOC (39.2 mg g(-1) soil), ergosterol (6.01 g g(-1) soil), and basal respiration (10.7 mu g g(-1) soil d(-1)) were observed at a stocking density of 8 sheep ha(-1) indicating that a low grazing intensity is recommendable to avoid soil degradation.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000612081600010
WOS关键词	PLANT DIVERSITY ; RANGELAND DEGRADATION ; SPATIAL VARIABILITY ; EXTRACTION METHOD ; ROOT EXUDATION ; RIVER OASIS ; BIOMASS-C ; CARBON ; MICROORGANISMS ; FUMIGATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348201
作者单位	[Goenster-Jordan, Sven; Ingold, Mariko; Buerkert, Andreas] Univ Kassel, Organ Plant Prod & Agroecosyst Res Trop & Subtrop, Steinstr 19, D-37123 Witzenhausen, Germany; [Jannoura, Ramia; Joergensen, Rainer Georg] Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany
推荐引用方式 GB/T 7714	Goenster-Jordan, Sven,Ingold, Mariko,Jannoura, Ramia,et al. Soil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountains[J],2021,11(1).
APA	Goenster-Jordan, Sven,Ingold, Mariko,Jannoura, Ramia,Buerkert, Andreas,&Joergensen, Rainer Georg.(2021).Soil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountains.SCIENTIFIC REPORTS,11(1).
MLA	Goenster-Jordan, Sven,et al."Soil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountains".SCIENTIFIC REPORTS 11.1(2021).