Effects of pulse precipitation on soil organic matter mineralization in forests: spatial variation and controlling factors

doi:10.1093/jpe/rtab057

	Effects of pulse precipitation on soil organic matter mineralization in forests: spatial variation and controlling factors
	Jiang, Zhaoxia 2,3; Bian, Hongfeng 2; Xu, Li 3; Li, Mingxu 3; He, Nianpeng 1,3,4,5
刊名	JOURNAL OF PLANT ECOLOGY
	2021-10-01
卷号	14 期号:5 页码:970-980
关键词	soil respiration carbon mineralization pulse effect forest spatial variation
ISSN号	1752-9921
DOI	10.1093/jpe/rtab057
通讯作者	Bian, Hongfeng(bianhf108@nenu.edu.cn) ; He, Nianpeng(henp@igsnrr.ac.cn)
英文摘要	Aims Pulse effects of precipitation cause soil organic matter to rapidly decompose and release CO2 in a short period. The pulse effects of precipitation are important for ecosystem C cycling and soil C balance, although their spatial variation in forest soils and the underlying mechanisms remain unclear. Methods Soil samples (0-10 cm) from 22 typical forest ecosystems in eastern China were used, to investigate the effects of simulated pulse precipitation on soil microbial respiration rates (R-s). We simulated pulsed precipitation to reach 65% water-holding capacity, the R-s was measured on a minute scale for 48 h. Important Findings Precipitation pulses can cause a rapid 1.70-38.12-fold increase in the rate of mineralized decomposing organic matter. Maximum R-s (Rs-soil-max), cumulative R-s (A(Rs-soil)) and the time taken to arrive at the maximal R-s (TRs-soil-max) were significant differences among different soil samples. Furthermore, the pulse effects in different climate zones were significantly different. Rs-soil-max (11.701 mu g C g(-1)soil h(-1)) and A(Rs-soil) (300.712 mu g C g(-1) soil) were the highest in the mid-temperate zone. Soil chemical properties (total C and, N, pH and oxidation-reduction potential) and soil fractions were strongly correlated with the pulse effects in forest soils, but soil microbes contributed less. Our findings demonstrated that the pulse effects increase forest soil carbon emissions in the short term at a regional scale, and identified the factors with the greatest influence on this change. These findings help guide future studies on the C cycles of forest ecosystems and regulating ecosystem C cycles.
资助项目	National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31770655] ; National Natural Science Foundation of China[31800368]
WOS关键词	MICROBIAL RESPIRATION ; TEMPERATURE SENSITIVITY ; N MINERALIZATION ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; GRASSLAND ; SHIFTS ; DECOMPOSITION ; AVAILABILITY ; COMMUNITIES
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000698485900011
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165905]
专题	中国科学院地理科学与资源研究所
通讯作者	Bian, Hongfeng; He, Nianpeng
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Northeast Normal Univ, Sch Environm, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Peoples R China 5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhaoxia,Bian, Hongfeng,Xu, Li,et al. Effects of pulse precipitation on soil organic matter mineralization in forests: spatial variation and controlling factors[J]. JOURNAL OF PLANT ECOLOGY,2021,14(5):970-980.
APA	Jiang, Zhaoxia,Bian, Hongfeng,Xu, Li,Li, Mingxu,&He, Nianpeng.(2021).Effects of pulse precipitation on soil organic matter mineralization in forests: spatial variation and controlling factors.JOURNAL OF PLANT ECOLOGY,14(5),970-980.
MLA	Jiang, Zhaoxia,et al."Effects of pulse precipitation on soil organic matter mineralization in forests: spatial variation and controlling factors".JOURNAL OF PLANT ECOLOGY 14.5(2021):970-980.