Impacts of land use conversion on the response of soil respiration to precipitation in drylands: A case study with four-yearlong observations

doi:10.1016/j.agrformet.2021.108426

	Impacts of land use conversion on the response of soil respiration to precipitation in drylands: A case study with four-yearlong observations
	Sun, Wenhao 3; Zhao, Xining 1,4; Gao, Xiaodong 1,4; Shi, Weiyu 2; Ling, Qiang 3; Siddique, Kadambot H. M.5
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2021-07-15
卷号	304 页码:11
关键词	CO2 Temperature sensitivity Q(10) Precipitation regime Land use conversion Afforestation
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2021.108426
通讯作者	Zhao, Xining(zxn@nwafu.edu.cn)
英文摘要	Soil respiration (Rs) in drylands is strongly influenced by precipitation. However, there is a lack of long-term studies on how land-use conversion impact the Rs's responds to precipitation variations. In situ Rs, soil moisture and soil temperature were monitored in cropland, and cropland converted jujube orchard, grassland and shrubland in the semiarid Loess Plateau, China for four years with significant interannual precipitation variation. Q(10)-soil moisture relationships were quantified by selecting observations within limited range of soil moisture. As soil moisture increased, Rs was found to be markedly suppressed in cropland and jujube orchard with great disturbance, with volumetric water content exceeding 0.15 and 0.16, respectively, but increased in grassland and shrubland with few disturbances. Q(10) became saturated as soil moisture increased in cropland, and was linearly correlated with soil moisture in jujube orchard, grassland and shrubland. Q(10) was least sensitive to soil moisture variation in shrubland, which was characterized by a nitrogen-fixing shrub. The interannual variation in mean growing season Rs (MGR) was positively correlated with mean soil moisture. The difference in MGR between land-use types was significant except during the extreme drought year: converting cropland to jujube orchard saw a reduction in MGR by 5-18%, while converting cropland to grassland and shrubland saw an increase in MGR by 16-53% and 67-126%, respectively. This corresponded with a greater sensitivity of MGR to soil moisture in grassland and shrubland. These results suggest a greater response of soil carbon emission in the landuse applied with afforestation or restoration to the enhanced soil moisture as precipitation intensify, compared to agricultural land-use.
资助项目	National Key Research and Development Program[2016YFC0400204] ; National Natural Science Foundation of China[41771316] ; CAS Youth Scholar of West China Program[XAB 2018A04] ; Natural Science Funds for Distinguished Young Scholar of Shaanxi Province[2021JC-19] ; Shaanxi Innovative Research Team for Key Science and Technology[2017KCT-15] ; '111' Project[B12007]
WOS关键词	TEMPERATURE SENSITIVITY ; LOESS PLATEAU ; CARAGANA-KORSHINSKII ; MICROBIAL BIOMASS ; CO2 FLUX ; LITTER DECOMPOSITION ; CARBON DECOMPOSITION ; NATURAL DROUGHT ; WATER-CONTENT ; PULSES
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000652014300011
资助机构	National Key Research and Development Program ; National Natural Science Foundation of China ; CAS Youth Scholar of West China Program ; Natural Science Funds for Distinguished Young Scholar of Shaanxi Province ; Shaanxi Innovative Research Team for Key Science and Technology ; '111' Project
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163911]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhao, Xining
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Southwest Univ, Sch Geog Sci, Chongqing, Peoples R China 3.Northwest A&F Univ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Minist Educ, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 5.Univ Western Australia, UWA Inst Agr, LB 5005, Perth, WA 6001, Australia
推荐引用方式 GB/T 7714	Sun, Wenhao,Zhao, Xining,Gao, Xiaodong,et al. Impacts of land use conversion on the response of soil respiration to precipitation in drylands: A case study with four-yearlong observations[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,304:11.
APA	Sun, Wenhao,Zhao, Xining,Gao, Xiaodong,Shi, Weiyu,Ling, Qiang,&Siddique, Kadambot H. M..(2021).Impacts of land use conversion on the response of soil respiration to precipitation in drylands: A case study with four-yearlong observations.AGRICULTURAL AND FOREST METEOROLOGY,304,11.
MLA	Sun, Wenhao,et al."Impacts of land use conversion on the response of soil respiration to precipitation in drylands: A case study with four-yearlong observations".AGRICULTURAL AND FOREST METEOROLOGY 304(2021):11.