NDLI: Seasonal changes in the contribution of root respiration to total soil respiration in a cool-temperate deciduous forest

Content Provider	Springer Nature Link
Author	Lee, Mi sun Nakane, Kaneyuki Nakatsubo, Takayuki Koizumi, Hiroshi
Copyright Year	2003
Abstract	A trenching method was used to determine the contribution of root respiration to soil respiration. Soil respiration rates in a trenched plot (R $_{trench}$) and in a control plot (R $_{control}$) were measured from May 2000 to September 2001 by using an open-flow gas exchange system with an infrared gas analyser. The decomposition rate of dead roots (R $_{D}$) was estimated by using a root-bag method to correct the soil respiration measured from the trenched plots for the additional decaying root biomass. The soil respiration rates in the control plot increased from May (240–320 mg CO$_{2}$ m$^{−2}$ h$^{−1}$) to August (840–1150 mg CO$_{2}$ m$^{−2}$ h$^{−1}$) and then decreased during autumn (200–650 mg CO$_{2}$ m$^{−2}$ h$^{−1}$). The soil respiration rates in the trenched plot showed a similar pattern of seasonal change, but the rates were lower than in the control plot except during the 2 months following the trenching. Root respiration rate (R $_{r}$) and heterotrophic respiration rate (R $_{h}$) were estimated from R $_{control}$, R $_{trench}$, and R $_{D}$. We estimated that the contribution of R $_{r}$ to total soil respiration in the growing season ranged from 27 to 71%. There was a significant relationship between R $_{h}$ and soil temperature, whereas R $_{r}$ had no significant correlation with soil temperature. The results suggest that the factors controlling the seasonal change of respiration differ between the two components of soil respiration, R $_{r}$ and R $_{h}$.
Starting Page	311
Ending Page	318
Page Count	8
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	255
Issue Number	1
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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