Driving factors of temporal variation in agricultural soil respiration

	Driving factors of temporal variation in agricultural soil respiration
	Wang, Yang 1,2,3; Boelter, Manfred 4; Chang, Qingrui 1; Duttmann, Rainer 2; Scheltz, Annette 4; Petersen, James F.5; Wang, Zhanli 3,6
刊名	ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE
	2015-10-03
卷号	65 期号:7 页码:589-604
关键词	Soil Respiration Temperature Sensitivity Of Soil Respiration Bacterial Biomass Dissolved Organic Carbon Diurnal Change Seasonal Change
文献子类	Article
英文摘要	Investigations of diurnal and seasonal variations in soil respiration support modeling of regional CO2 budgets and therefore in estimating their potential contribution to greenhouse gases. This study quantifies temporal changes in soil respiration and their driving factors in grassland and arable soils located in Northern Germany. Field measurements at an arable site showed diurnal mean soil respiration rates between 67 and 99 mg CO2 m(-2) h(-1) with a hysteresis effect following changes in mean soil temperatures. Field soil respiration peaked in April at 5767 mg CO2 m(-2) day(-1), while values below 300 mg CO2 m(-2) day(-1) were measured in wintertime. Laboratory incubations were carried out in dark open flow chambers at temperatures from 5 degrees C to 40 degrees C, with 5 degrees C intervals, and soil moisture was controlled at 30%, 50%, and 70% of full water holding capacity. Respiration rates were higher in grassland soils than in arable soils when the incubating temperature exceeded 15 degrees C. The respiration rate difference between them rose with increasing temperature. Monthly median values of incubated soil respiration rates ranged from 0 to 26.12 and 0 to 7.84 mu g CO2 g(-1) dry weight h(-1), respectively, in grassland and arable land. A shortage of available substrate leads to a temporal decline in soil respiration rates, as indicated by a decrease in dissolved organic carbon. Temporal Q(10) values decreased from about 4.0 to below 1.5 as temperatures increased in the field. Moreover, the results of our laboratory experiments confirmed that soil temperature is the main controlling factor for the Q(10) values. Within the temperature interval between 20 degrees C and 30 degrees C, Q(10) values were around 2 while the Q(10) values of arable soils were slightly lower compared to that of grassland soils. Thus, laboratory studies may underestimate temperature sensitivity of soil respiration, awareness for transforming laboratory data to field conditions must therefore be taken into account.
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; LAND-USE CHANGES ; MICROBIAL BIOMASS ; SEASONAL-VARIATIONS ; CARBON-DIOXIDE ; CO2 EFFLUX ; TEMPERATURE-DEPENDENCE ; NORTHERN CHINA ; GROWING-SEASON ; WATER-CONTENT
语种	英语
出版者	TAYLOR & FRANCIS AS
WOS记录号	WOS:000359340100003
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/67877]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Zhanli
作者单位	1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 2.Univ Kiel, Dept Geog, Div Phys Geog Landscape Ecol & Geoinformat Sci LG, D-24098 Kiel, Germany 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Univ Kiel, Inst Ecosyst Res, D-24118 Kiel, Germany 5.Texas State Univ, Dept Geog, San Marcos, TX 78666 USA 6.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang,Boelter, Manfred,Chang, Qingrui,et al. Driving factors of temporal variation in agricultural soil respiration[J]. ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE,2015,65(7):589-604.
APA	Wang, Yang.,Boelter, Manfred.,Chang, Qingrui.,Duttmann, Rainer.,Scheltz, Annette.,...&Wang, Zhanli.(2015).Driving factors of temporal variation in agricultural soil respiration.ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE,65(7),589-604.
MLA	Wang, Yang,et al."Driving factors of temporal variation in agricultural soil respiration".ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE 65.7(2015):589-604.