scholarly journals Soil CO2 efflux in young Norway spruce stands with different silviculture practices

2013 ◽  
Vol 61 (6) ◽  
pp. 1845-1851
Author(s):  
Jiří Rosík ◽  
Tomáš Fabiánek ◽  
Irena Marková
Keyword(s):  
Czech Republic ◽  
Soil Temperature ◽  
Norway Spruce ◽  
Seasonal Changes ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
The Czech Republic ◽  
Spruce Stands

Seasonal changes of soil CO2 efflux were investigated in two young Norway spruce stands with different silviculture practices (below and above thinning) during the 2010–2012 at the Ecosystem Station of Rájec – Němčice (the Drahanská vrchovina Highland, the Czech Republic). Soil CO2 efflux was almost about 20% higher in the plot with above thinning compared to the plot with bellow thinning. Soil CO2 efflux between the studied plots was significant in the studied years 2010 and 2012. Soil CO2 efflux was positively related to soil temperature in the both studied spruce plots. Silviculture practices had effect on soil CO2 efflux in studied young Norway spruce stand.

scholarly journals Soil CO2 efflux in uneven-aged and even-aged Norway spruce stands in southern Finland

2018 ◽  
Vol 11 (6) ◽  
pp. 705-712 ◽  
Author(s):  
A Kumpu ◽  
A Mäkelä ◽  
J Pumpanen ◽  
J Saarinen ◽  
F Berninger
Keyword(s):  
Norway Spruce ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Spruce Stands

scholarly journals Significance of soil respiration from biological activity in the degradation processes of different types of organic matter

2020 ◽  
Vol 1 (2) ◽  
pp. 171-179
Keyword(s):  
Climate Change ◽  
Organic Matter ◽  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Temperature Sensitivity ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Total Soil

Soil respiration is a major component of global carbon cycle. Therefore, it is crucial to understand the environmental controls on soil respiration for evaluating potential response of ecosystems to climate change. In a temperate deciduous forest (located in Northern-Hungary) we added or removed aboveground and belowground litter to determine total soil respiration. We investigated the relationship between total soil CO2 efflux, soil moisture, and soil temperature. Soil CO2 efflux was measured at each plot using soda-lime method. Temperature sensitivity of soil respiration (Q10) was monitored via measuring soil temperature on an hourly basis, while soil moisture was determined monthly. Soil respiration increased in control plots from the second year after implementing the treatment, but results showed fluctuations from one year to another. The effect of doubled litter was less significant than the effect of removal. Removed litter and root inputs caused substantial decrease in soil respiration. We found that temperature was more influential in the control of soil respiration than soil moisture. In plots with no litter Q10 varied in the largest interval. For treatment with doubled litter layer, temperature sensitivity of CO2 efflux did not change considerably. The effect of increasing soil temperature is more conspicuous to soil respiration in litter removal treatments since lack of litter causes greater irradiation. When exclusively leaf litter was considered, the effect of temperature on soil respiration was lower in treatments with added litter than with removed litter. Our results reveal that soil life is impacted by the absence of organic matter, rather than by an excess of organic matter. Results of CO2 emission from soils with different organic matter content can contribute to sustainable land use, considering the changed climatic factors caused by global climate change.

scholarly journals Changes in the nutrition and health status of young Norway spruce stands in the Krkonoše Mts. in a 17-year period

2017 ◽  
Vol 63 (No. 8) ◽  
pp. 344-354
Author(s):  
Novotný Radek ◽  
Lomský Bohumír ◽  
Šrámek Vít
Keyword(s):  
Czech Republic ◽  
Norway Spruce ◽  
Nutrient Concentrations ◽  
Height Increment ◽  
Forest Stands ◽  
Future Health ◽  
The Czech Republic ◽  
N Nutrition ◽  
Spruce Stands ◽  
Spruce Needles

For 17 Norway spruce stands located in the Krkonoše Mts. in the Czech Republic a long-term assessment of defoliation, height increment, foliage concentration of nutrients (N, P, Ca, K, Mg) and stress elements (S, F) was carried out. The results show a decrease of defoliation and a slight increase of height increment, which occur in accordance with the decreasing concentration of sulphur in spruce needles. However, neither sulphur concentration nor height increment trends are significant, suggesting that both the main pollution abatement and the growth resumption took place already in the 1990’s. During the late 1990’s the average spruce defoliation was greater than 35%, while since 2007 it has fluctuated between 18 and 25%, which corresponds with the figures for the forest stands located in the other regions of the Czech Republic. The evaluation of single nutrient concentrations detected occasional deficiencies of P and Mg at individual plots. The good N nutrition (&gt; 15 mg N·g<sup>–1</sup>) in combination with a significantly decreasing trend of P, K and Ca concentrations in Norway spruce needles may potentially constitute a problem in regard to both the future health and the stability of forest stands in the studied region.

scholarly journals Soil CO2 efflux in a beech forest: dependence on soil temperature and soil water content

1999 ◽  
Vol 56 (3) ◽  
pp. 221-226 ◽  
Author(s):  
Daniel Epron ◽  
Lætitia Farque ◽  
Éric Lucot ◽  
Pierre-Marie Badot
Keyword(s):  
Soil Temperature ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Beech Forest ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Forest Dependence

Corrigendum to: Seasonal patterns of soil carbon dioxide efflux from a wet¿dry tropical savanna of northern Australia

2002 ◽  
Vol 50 (3) ◽  
pp. 373
Author(s):  
Xiaoyong Chen ◽  
Derek Eamus ◽  
Lindsay B. Hutley
Keyword(s):  
Root Growth ◽  
Soil Temperature ◽  
Dry Season ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Tropical Savanna ◽  
Northern Australia ◽  
Soil Co2 ◽  
Wet Season ◽  
Closed Chamber

Soil CO2 efflux rates were measured in a eucalypt open forest in a tropical savanna of northern Australia, with a portable closed chamber and CO2 gas analyser. Both abiotic (soil temperature and water content) and biotic (litterfall and fine-root growth) factors that may influence soil CO2 efflux were examined. Daytime rates of soil CO2 efflux rate were consistently higher than nocturnal values. Maximal rates occurred during late afternoons when soil temperatures were also maximal and minimum values were recorded during the early morning (0400–0800 hours). Average soil CO2 efflux was 5.37 mol m–2 s–1 (range 3.5–6.7 mol m–2 s–1 during the wet season and declined to 2.20 mol m–2 s–1 (range 1.2–3.6 mol m–2 s–1) during the dry season. The amount of carbon released from soil was 14.3 t ha–1 year–1, with approximately 70&percnt; released during the wet season and 30&percnt; during the dry season. The rate of efflux was correlated with soil moisture content and soil temperature only during the wet season, when root growth and respiration were high. During the dry season there was no correlation with soil temperature. These results are discussed in relation to the carbon balance of tropical savannas.

scholarly journals Effect of measurement time of the day on the relationship between temperature and soil CO2 efflux

2011 ◽  
Vol 59 (6) ◽  
pp. 127-134
Author(s):  
Eva Dařenová ◽  
M. Pavelka ◽  
D. Janouš
Keyword(s):  
Soil Temperature ◽  
Carbon Flux ◽  
Continuous Measurement ◽  
Soil Co2 Efflux ◽  
Measurement Time ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Continuous Measurements ◽  
Proportional Change ◽  
The Relationship

In this study we investigated effect of the time of the day when manual measurements of soil CO2 efflux are performed on estimates of seasonal sums of released carbon from the soil. We subsampled continuous measurement of soil CO2 efflux into six sets of data in accordance to the time of the day when the measurements were taken – 0 h, 4 h, 8 h, 12 h, 16 h and 20 h. To estimate seasonal carbon flux from the soil we used continuously measured soil temperature and parameters R10 (soil CO2 efflux normalized for temperature of 10 °C) and Q10 (the proportional change in CO2 efflux caused by 10 °C increase in temperature) calculated from continuous measurements and from measurements taken at individual hours. Values of Q10 calculated from 12 h and 16 h data were lower than Q10 calculated from continuous measurements. On the contrary, Q10 at 0 h, 4 h, 8 h and 20 h were higher. Seasonal carbon flux from the soil based on 0 h, 4 h and 8 h measurements was overestimated compare to the flux calculated from continuous measurements. On the contrary, measurements at 12 h, 16 h and 20 h measurements underestimated the carbon flux. The under- or overestimation was significant for 0 h, 4 h, 8 h and 20 h data sub-sets.

scholarly journals Effects of Fire Frequency and Soil Temperature on Soil CO2 Efflux Rates in Old-Field Pine-Grassland Forests

Forests ◽  
2017 ◽  
Vol 8 (8) ◽  
pp. 274 ◽  
Author(s):  
David Godwin ◽  
Leda Kobziar ◽  
Kevin Robertson
Keyword(s):  
Soil Temperature ◽  
Fire Frequency ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Old Field
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