Soil CO2 fluxes beneath barley on the central Spanish plateau

Sánchez, M. Luisa; Ozores, Marta; López, María Luisa S. Sequeira; Colle, R; Torre, B. de; Garcia, Maria; Pérez, Isidro A.

doi:10.1016/s0168-1923(03)00066-2

Cited by 53 publications

(29 citation statements)

References 23 publications

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“…Part of this effect can be attributed to greater root respiration under ploughing, especially in warmer months (Almaraz et al, 2009). Reduction of CO 2 fluxes under reduced tillage compared with conventional tillage have also been reported by Sánchez et al (2002Sánchez et al ( , 2003 in soils of the Spanish plateau.…”

Section: N 2 O Emissionssupporting

confidence: 60%

No-till in northern, western and south-western Europe: A review of problems and opportunities for crop production and the environment

Soane¹,

Ball²,

Arvidsson³

et al. 2012

Soil and Tillage Research

627

501

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Section: N 2 O Emissionssupporting

confidence: 60%

No-till in northern, western and south-western Europe: A review of problems and opportunities for crop production and the environment

Soane¹,

Ball²,

Arvidsson³

et al. 2012

Soil and Tillage Research

627

501

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“…CO 2 outputs at Hontomín lie within the range of averaged CO 2 flux from biological activity in Mediterranean ecosystems (Table 3; Almagro et al, 2009;Sánchez et al, 2003). On the other hand, data from Hontomín show values much smaller than those observed in many natural analogs of CO 2 leakage, which have a total CO 2 output up to three orders of magnitude higher (Fig.…”

Section: Co 2 Flux At Hontomín Areasupporting

confidence: 58%

“…These campaigns were carried out in warm periods (spring 2010, summer 2010 and spring 2011, respectively) when soil respiration is higher and the CO 2 fluxes become more heterogeneous due to several process in the soil (Sánchez et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

CO2 soil flux baseline at the technological development plant for CO2 injection at Hontomin (Burgos, Spain)

Elío

Nisi

Ortega

et al. 2013

International Journal of Greenhouse Gas Control

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a b s t r a c tFrom the end of 2013 and during the following two years, 20 kt of CO 2sc are planned to be injected in a saline reservoir (1500 m depth) at the Hontomín site (NE Spain). The target aquifers are Lower Jurassic limestone formations which are sealed by Lower Cretaceous clay units at the Hontomín site (NE Spain). The injection of CO 2 is part of the activities committed in the Technology Development phase of the EC-funded OXYCFB300 project (European Energy Program for Recovery -EEPR, http://www.compostillaproject.eu), which include CO 2 injection strategies, risk assessment, and testing and validating monitoring methodologies and techniques.Among the monitoring works, the project is intended to prove that present-day technology is able to monitor the evolution of injected CO 2 in the reservoir and to detect potential leakage. One of the techniques is the measurement of CO 2 flux at the soil-atmosphere interface, which includes campaigns before, during and after the injection operations.In this work soil CO 2 flux measurements in the vicinity of oil borehole, drilled in the eighties and named H-1 to H-4, and injection and monitoring wells were performed using an accumulation chamber equipped with an IR sensor. Seven surveys were carried out from November 2009 to summer 2011. More than 4000 measurements were used to determine the baseline flux of CO 2 and its seasonal variations.The measured values were low (from 5 to 13 g m −2 day −1 ) and few outliers were identified, mainly located close to the H-2 oil well. Nevertheless, these values cannot be associated to a deep source of CO 2 , being more likely related to biological processes, i.e. soil respiration. No anomalies were recognized close to the deep fault system (Ubierna Fault) detected by geophysical investigations. There, the CO 2 flux is indeed as low as other measurement stations. CO 2 fluxes appear to be controlled by the biological activity since the lowest values were recorded during autumn-winter seasons and they tend to increase in warm periods. Two reference CO 2 flux values (UCL 50 of 5 g m −2 d −1 for non-ploughed areas in autumn-winter seasons and 3.5 and 12 g m −2 d −1 for in ploughed and non-ploughed areas, respectively, in spring-summer time, and UCL 99 of 26 g m −2 d −1 for autumn-winter in not-ploughed areas and 34 and 42 g m −2 d −1 for spring-summer in ploughed and not-ploughed areas, respectively) were calculated. Fluxes higher than these reference values could be indicative of possible leakage during the operational and post-closure stages of the storage project.

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“…Soil respiration, which originates from autotrophic root respiration and heterotrophic microbial respiration in the rhizosphere and the bulk soil, provides the main carbon efflux from terrestrial ecosystems to the atmosphere and is therefore an important component of the global carbon balance (IPCC, 1996;Buchmann, 2000;Schlesinger and Andrews, 2000). Small changes in soil respiration across large areas can produce a great effect on CO 2 atmospheric concentrations and provide a potential positive feedback between increasing temperature and enhanced soil respiration that may ultimately accelerate global warming (Grace and Rayment, 1999;Schlesinger and Andrews, 2000;Sa´nchez et al, 2003;Rodeghiero and Cescatti, 2005). Therefore, detailed information on soil respiration and its controlling factors is critical for constraining the ecosystem C budget and for understanding the response of soils to changing land use and global climate change (Lindroth et al, 1998;Buchmann, 2000;Tufekcioglu et al, 2001;Lee et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Biotic and abiotic factors controlling the spatial and temporal variation of soil respiration in an agricultural ecosystem

Han

Zhou

et al. 2007

Soil Biology and Biochemistry

123

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Based on the continuous observation of soil respiration and environmental factors in a maize ecosystem from late April to late September in 2005, the spatial and temporal variation of soil respiration and their controlling factors were analyzed. There was a significant spatial pattern for soil respiration at the plant scale and higher soil respiration rates tended to occur near the maize plant during the growing season. On one measurement moment, root biomass (B) in soil collars exerted significant influence on the spatial pattern of soil respiration under the relatively homogeneous environmental conditions. A linear relationship existed between soil respiration rate and root biomassAt daily scale, the coefficient a and b in Eq.(1) fluctuated because soil temperature (T) markedly reduced the intercept (b) of the linear equation and significantly increased its slope (a). Based on this, we developedEq. (2) indicated that increasing soil temperature ameliorated the positive relationship between soil respiration and root biomass in the daily variation of soil respiration. At seasonal scale, parameter a, b and c in Eq. (2) were affected mainly by soil moisture (W), soil temperature and net primary productivity (NPP), respectively. Thus, we developedto estimate soil respiration during the growing season. Eq. (3) demonstrated that soil temperature, soil moisture, root biomass and NPP combined affected soil respiration at season scale, and they accounted for 78% of the seasonal and spatial variation of soil respiration during the growing season. Eq. (3) not only took into account the influence of soil temperature and moisture, but also incorporated biotic factors as predictor variables, which would lead to an improvement in predictive capabilities of the model. Moreover, Eq. (3) could simulate instantaneous soil respiration rates from different sampling points and at different temporal scales, so it could explain not only the temporal variation of soil respiration, but also its spatial variation. Although this model might not be broadly applicable, the results suggested that there was significant spatial heterogeneity in soil respiration at the plant scale and root biomass dominated the small-scale spatial patterns of soil respiration. Thus, the models of soil respiration should not only take into account the influence of environmental factors, but also incorporate biotic factors in order to scale-up the chamber measurements of soil respiration to ecosystem level. r

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Soil CO2 fluxes beneath barley on the central Spanish plateau

Cited by 53 publications

References 23 publications

No-till in northern, western and south-western Europe: A review of problems and opportunities for crop production and the environment

No-till in northern, western and south-western Europe: A review of problems and opportunities for crop production and the environment

CO2 soil flux baseline at the technological development plant for CO2 injection at Hontomin (Burgos, Spain)

Biotic and abiotic factors controlling the spatial and temporal variation of soil respiration in an agricultural ecosystem

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