Soil Respiration in Drying of an Organic Soil

Fischer, Zofia; Blažka, Pavel

doi:10.4236/ojss.2015.59018

Cited by 3 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They were later corrected for pressure and temperature, multiplied by the calibration factor and related per gram of dry soil per hour. The method was described in details by Fischer and Blažka [22]. Measurements were repeated 12 times for each soil sample.…”

Section: Soil Samplingmentioning

confidence: 99%

Soil Respiration in the Profiles of Forest Soils in Inland Dunes

Fischer¹,

Dubis²

2019

OJSS

Self Cite

View full text Add to dashboard Cite

Forest soil profiles of two dunes within the European belt of inland dunes were analysed in the laboratory. We carried out respirometric measurements of carbon dioxide production and oxygen consumption for every horizon of the studied soils while simultaneously quantifying the organic matter and humidity. Oxygen consumption and carbon dioxide excretion decreased exponentially with depth. The oxygen consumption decrease was less rapid than the decrease in carbon dioxide production. We found a statistical significant linear dependence between oxygen consumption and carbon dioxide excretion, and organic matter content and soil water capacity. Respiration processes in the profiles were divided into two strata; oxygen respiration dominated in the first and fermentation processes in the second. We estimated total respiration in the studied profiles for an area of 1 m 2 down to around 1 m depth. We concluded that when assessing the soil's role in carbon cycling in an ecosystem, it is necessary to consider both the respiratory and fermentation strata, as both produce large quantities of carbon dioxide. The main factor determining carbon dioxide production intensity is organic matter content; thus the distribution of organic matter in the soil profile determines carbon cycling intensity.

show abstract

Section: Soil Samplingmentioning

confidence: 99%

Soil Respiration in the Profiles of Forest Soils in Inland Dunes

Fischer¹,

Dubis²

2019

OJSS

Self Cite

View full text Add to dashboard Cite

show abstract

“…We then plotted the results against time of readings, the slope coefficient of the regression (β1) was the rate (O 2 consumption-OCD or PCO 2 ); the respective regression coefficients were all r > 0.95, they were later corrected for pressure and temperature, multiplied by the calibration factor and related per gram dry soil and hour. The method was described in detail by Fischer and Blažka [1].…”

Section: Respirationmentioning

confidence: 99%

“…The MC and MS trial, as described in the methods (Table 1) was carried out on uncompressed soil, only in partially filled up respirometric containers. Sieving, necessary to uniform soil samples, facilitates an influx of greater amounts of air into the soil, the release of CO 2 previously accumulated into the atmosphere [1] or even a change in soil granulometry [15]. Sieved soil placed into containers exposed to the air can be compared to surface layers of the soil.…”

Section: Unrestricted Air Accessmentioning

confidence: 99%

“…The authors of the study analyzed a respirometric reaction of organic soil for changes of its moisture. In the preceding paper, the respirometric reactions of the soil to desiccation were evaluated [1]. Under natural conditions, the process of drying out interlinks with an increase of moisture contents, therefore we hope that both papers are complementary.…”

Section: Introductionmentioning

confidence: 99%

“…The method also allows us to determine the RQ index, which, to some extent, estimates the role of fermentation and respiration in the respired soil. This determination, though, is not too accurate as RQ rate can range from over 1 to below 0.7 depending on particular fermentation pathways [1]. The major concern, however, is whether experiments are conducted under unrestricted air-supply conditions, as in most laboratory studies, or under conditions more similar to those in nature where oxygen deficiency may occur.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Respiration Rates of Organic Soil Depending on Changes of Moisture and Aeration

Fischer¹,

Blažka²,

Dubis³

2017

OJSS

Self Cite

View full text Add to dashboard Cite

This paper aims at analyzing changes in soil respiration depending on the levels of soil moisture and aeration. Organic forest soil was used in the experiments. Watering of the soil was applied starting from two initial moisture contents: 1) GWC > 0.1, desiccated soil, respiration equals to zero; 2) GWC between 0.46-0.78, moisture of the soil approximately the same as at the time of sample collection. Watering of the soil was applied once or continuously during the experiment. The experiments were conducted under both: unrestricted air-supply and anoxic conditions. Measurements of: oxygen consumption, carbon dioxide emission, and RQ were determined with a volumetric respirometer. Soil desiccation, which occurs under good access of the air, and leads to the increase of respiration rate (the "Birch effect"), is predominantly related to aerobic respiration following the change in soil aeration. If respiration of non-desiccated soil is assumed as 100%, the oxygen consumption of desiccated soil equaled to 209.90% of such value in the non-desiccated soil at the lowest moisture level, and only to 51% at the highest. Carbon dioxide emission equaled to 191.92% and 111% at the lowest and the highest moisture levels, respectively. Desiccation did not increase the respiration rate under anoxic conditions. It either decreased or remained statistically unchanged. However, obtained values of RQ index suggest that under anoxic conditions desiccation affects fermentation processes in the soil. The value of RQ index at the moisture level lower than GWC 1 was very low attaining merely 0.3-0.4, which suggests active fermentation processes. At higher moisture content yet, RQ value exceeded 2.

show abstract

Remote-Sensing-Based Water Balance for Monitoring of Evapotranspiration and Water Stress of a Mediterranean Oak–Grass Savanna

Carpintero

Andreu

Gómez-Giráldez

et al. 2020

Water

View full text Add to dashboard Cite

Mediterranean oak savannas (known as dehesas in Spain) are exposed to numerous threats from natural and economic causes. A close monitoring of the use of water resources and the status of the vegetation in these ecosystems can be useful tools for maintaining the production of ecological services. This study explores the estimation of evapotranspiration (ET) and water stress over a dehesa by integrating remotely sensed data into a water balance using the FAO-56 approach (VI-ETo model). Special attention is paid to the different phenology and contribution to the system’s hydrology of the two main canopy layers of the system (tree + grass). The results showed that the model accurately reproduced the dynamics of the water consumed by the vegetation, with RMSE of 0.47 mm day−1 and low biases for both, the whole system and the grass layer, when compared with flux tower measurements. The ET/ETo ratio helped to identify periods of water stress, confirmed for the grassland by measured soil water content. The modeling scheme and Sentinel-2 temporal resolution allowed the reproduction of fast and isolated ET pulses, important for understanding the hydrologic behavior of the system, confirming the adequacy of this sensor for monitoring grasslands water dynamics.

show abstract

Soil Respiration in Drying of an Organic Soil

Cited by 3 publications

References 25 publications

Soil Respiration in the Profiles of Forest Soils in Inland Dunes

Soil Respiration in the Profiles of Forest Soils in Inland Dunes

Respiration Rates of Organic Soil Depending on Changes of Moisture and Aeration

Remote-Sensing-Based Water Balance for Monitoring of Evapotranspiration and Water Stress of a Mediterranean Oak–Grass Savanna

Contact Info

Product

Resources

About