Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems

doi:10.1016/j.apsoil.2021.103928

	Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems
	Zhao, Man 2; Guo, Shengli 1,2; Wang, Rui 1,2
刊名	APPLIED SOIL ECOLOGY
	2021-07-01
卷号	163 页码:9
关键词	Extreme precipitation patterns Soil respiration Water stress N and maize straw
ISSN号	0929-1393
DOI	10.1016/j.apsoil.2021.103928
通讯作者	Wang, Rui(ruiwang0212@126.com)
英文摘要	Projected increases in the frequency and magnitude of extreme precipitation profoundly impact terrestrial ecosystems. However, the response of soil respiration to changing precipitation patterns has not been systematically investigated, especially in arid and semi-arid areas. Precipitation amounts of 300 and 600 mm (T300 and T600) were set to simulate normal and extremely wet summers, respectively, and were individually conducted by wetting soils in a series of sub-events?10 or 100 mm (P10, P100)?over equal time intervals. Maize straw (1300 kg ha-1) and N fertilization (200 kg N ha-1) were applied in parallel to extend our simulation to natural cropland conditions. Soil respiration pulses were observed after T300-P100, and inhibited effects occasionally occurred 1 day after T600-P100, primarily because frequent and harsh storms in T600-P100 induced saturation stress on soil respiration. Cumulative soil respiration in T600 was greater than that in T300, owing to prolonged suitable water conditions for soil respiration. Similarly, for the same total precipitation amount, P100 produced 40?44% more soil respiration than P10. Applying N and maize straw did not change response trends but produced different magnitudes of response to changing precipitation patterns. Maize straw significantly stimulated soil respiration, and this effect became more evident in P100 with improved water conditions, producing a 122?185% increase in cumulative soil respiration. Nitrogen slightly inhibited soil respiration; this effect was enhanced when maize straw was also added but was insignificant. Cumulative soil respiration was significantly correlated with ?-Dglucosidase and soil microbial biomass carbon content. Such soil respiration responses highlight the need to accurately account for soil respiration contributions when projecting global carbon cycling in future climate scenarios.
资助项目	National Natural Science Foundation of China[41830751] ; China Postdoctoral Science Foundation[2018M643755]
WOS关键词	WATER-USE EFFICIENCY ; LOESS PLATEAU ; MICROBIAL COMMUNITIES ; HETEROTROPHIC RESPIRATION ; CROP RESIDUE ; CARBON ; PULSES ; RAINFALL ; DESERT ; CHINA
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000647783900018
资助机构	National Natural Science Foundation of China ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162913]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Rui
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Man,Guo, Shengli,Wang, Rui. Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems[J]. APPLIED SOIL ECOLOGY,2021,163:9.
APA	Zhao, Man,Guo, Shengli,&Wang, Rui.(2021).Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems.APPLIED SOIL ECOLOGY,163,9.
MLA	Zhao, Man,et al."Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems".APPLIED SOIL ECOLOGY 163(2021):9.