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Seasonal and diurnal dynamics of soil respiration fluxes in two typical forests on the semiarid Loess Plateau of China: Temperature sensitivities of autotrophs and heterotrophs and analyses of integrated driving factors
Shi, WY (Shi, Wei-Yu)[1,3,5]; Zhang, JG (Zhang, Jian-Guo)[1,5]; Yan, MJ (Yan, Mei-Jie)[1,2]; Yamanaka, N (Yamanaka, Norikazu)[4]; Du, S (Du, Sheng)[1,2]
2012-09-01
发表期刊SOIL BIOLOGY & BIOCHEMISTRY
卷号52页码:99-107
文章类型期刊论文
摘要

Partitioning of total soil respiration (R-T) into autotrophic (R-A) and heterotrophic (R-H) components was undertaken in two typical (natural and artificial) forests on the temperate, semiarid Loess Plateau of China, to determine and compare temperature sensitivities between the two components. The natural secondary forest was dominated by oak (Quercus liaotungensis) while the artificial forest was a plantation of black locust (Robinia pseudoacacia). Soil CO2 efflux and different abiotic and biotic factors were measured during dormant and growing seasons. Temperature sensitivities of soil respiration components were investigated using the Q(10) function at diurnal and seasonal scales. The temperature sensitivities of autotrophic (R-A) and heterotrophic (R-H) respiration varied with the time scales (daily, seasonal, or annual) of the investigation, and were affected by other biological and environmental factors. The largest contribution of R-A to R-T was 46% in the oak forest and 60% in the black locust plantation during the growing season. During the dormant season it was as low as 12% in the oak forest and 6% in the black locust plantation. The Q(10) of R-A for the black locust plantation was higher than for the oak forest during the growing season, but was lower during the dormant season. The Q(10) of R-A in both forests was higher than that of R-H at both diurnal and seasonal scales. Multiple regression analyses suggested that photosynthesis is an important parameter in soil respiration studies and that a multiple-factor model may be more suitable during the annual periods.

关键词Autotrophic Respiration Co2 Efflux Heterotrophic Respiration Q10 Semiarid Forest
DOI10.1016/j.soilbio.2012.04.020
收录类别SCI ; EI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10193
专题生态环境研究室
通讯作者Du, S (Du, Sheng)[1,2]
作者单位1.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100, China;
2.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;
3.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, Shaanxi 710075, China;
4.Arid Land Research Center, Tottori University, Tottori 680-0001, Japan;
5.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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GB/T 7714
Shi, WY ,Zhang, JG ,Yan, MJ ,et al. Seasonal and diurnal dynamics of soil respiration fluxes in two typical forests on the semiarid Loess Plateau of China: Temperature sensitivities of autotrophs and heterotrophs and analyses of integrated driving factors[J]. SOIL BIOLOGY & BIOCHEMISTRY,2012,52:99-107.
APA Shi, WY ,Zhang, JG ,Yan, MJ ,Yamanaka, N ,&Du, S .(2012).Seasonal and diurnal dynamics of soil respiration fluxes in two typical forests on the semiarid Loess Plateau of China: Temperature sensitivities of autotrophs and heterotrophs and analyses of integrated driving factors.SOIL BIOLOGY & BIOCHEMISTRY,52,99-107.
MLA Shi, WY ,et al."Seasonal and diurnal dynamics of soil respiration fluxes in two typical forests on the semiarid Loess Plateau of China: Temperature sensitivities of autotrophs and heterotrophs and analyses of integrated driving factors".SOIL BIOLOGY & BIOCHEMISTRY 52(2012):99-107.
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