Sensitivity of soil respiration to moisture and temperature

Guntiñas, M.E.; Gil‐Sotres, F.; Leirós, M.C.; Trasar-Cepeda, Carmen

doi:10.4067/s0718-95162013005000035

Cited by 47 publications

(43 citation statements)

References 31 publications

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“…Such combination condition represented the degenerating peatlands, where substantial carbon was released as CO 2 to the atmosphere and as DOC to the nearby waters Singer et al, 2012). On one hand, in a warmer and O 2 richer environment, SOM becomes more available for microbes that accelerate Rs (Guntiñas et al, 2013). On the other hand, warming may dry up peatlands, which in turn accelerates SOM decomposition (Dorrepaal et al, 2009;Fenner and Freeman, 2011;Munir et al, 2015).…”

Section: Effects Of Temperature and Oxygenmentioning

confidence: 99%

Responses of peat carbon at different depths to simulated warming and oxidizing

Liu

Chen

Zhu

et al. 2016

Science of The Total Environment

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Section: Effects Of Temperature and Oxygenmentioning

confidence: 99%

Responses of peat carbon at different depths to simulated warming and oxidizing

Liu

Chen

Zhu

et al. 2016

Science of The Total Environment

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“…The difference between water contents was much greater in planted than unplanted soil. In both planted and unplanted soil, this can be explained by the direct effect of low water availability on microbes including reduced substrate and enzyme diffusion, reduced water uptake and possibly even loss of water from cells (Ilstedt et al, 2000, Guntinas et al, 2013. In planted soil, this effect of low water availability is exacerbated by poor plant growth, thus C input into the soil.…”

Section: Original Treatmentmentioning

confidence: 99%

Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting

Ran

Shen

Marschner

2016

J. Soil Sci. Plant Nutr.

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The aim of this experiment was to study the effect of previous water content in planted and unplanted soil on microbial biomass and nutrient availability after plant removal and rewetting. A silt loam was maintained 10-50% of water holding capacity (WHC) and planted with wheat or left unplanted. After four weeks, plants were removed and soils were kept atthe same water content as in the pots (original) or rewetted to 50% WHC (rewet). Then, soil respiration was measured continuously for 20 days, available N and P and microbial biomass C, N and P were measured on days 5, 10 and 20. In original soil, cumulative respiration, MBC and MBN decreased with water content in planted soil and were higher in planted than unplanted soil only at 30-50% WHC. Available N was up to 3-fold higher in un-planted than planted soil at 30-50% WHC. Only in planted soil, available N increased with decreasing water content. Rewetting increased cumulative respiration and MBN only in soil that had been at 10-20% WHC. In rewet soil, the previous water content had no effect on cumulative respiration, MBC and MBN in unplanted soil. In planted soil, cumulative respiration, MBC and MBN remained lower in soil that was at 10% WHC previously compared to that at 50% WHC. It is concluded that the effect of low water content on soil microbes is exacerbated by reduced plant growth and the reduced C input, even if soils are rewet.

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“…Those results indicated that the Q 10 values may be changed by tillage and straw mulch treatment along the slope position. The Q 10 value was higher at low soil moisture content [54]. Shi et al [3] found that Q 10 values were negatively correlated with average soil temperature and moisture.…”

Section: Effect Of Slope Position On Soil Respirationmentioning

confidence: 99%

Effect of No-Till Farming and Straw Mulch on Spatial Variability of Soil Respiration in Sloping Cropland

Li¹,

Hou²,

Wang³

et al. 2016

Pol. J. Environ. Stud.

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The two major techniques of conservation agriculture -no-till and straw mulch -are widely used in agricultural activities. Many studies have investigated the response of soil respiration to conservation agriculture. However, there are few studies estimating soil CO 2 emissions in sloping cropland. For this research we selected typical sloping cropland in China's semiarid Loess Plateau region. The spatial heterogeneity of soil respiration under different tillage and straw mulch was investigated using an LI-8100A soil carbon flux measuring system from October 2013 to September 2014. Soil respiration showed a strong seasonal pattern under all treatments, with the highest values in July ). No-till increased soil respiration by increasing soil temperature and soil moisture, while straw mulch decreased soil moisture and had the tendency to increase annual total carbon emissions, and straw incorporation had the highest annual total soil carbon emissions (992 g C m -2 ). The slope stage had a visible effect on soil respiration, and soil respiration rates increased in the following order: lower > middle > upper positions under different treatments. The relationship between soil respiration and soil moisture was linear under all treatments; the exponential model was more suitable for simulating the relationship between soil respiration and soil temperature. Temperature sensitivity (Q 10 ) values under different treatments ranged from 1.94 to 2.63, and the difference among tillage and straw mulch treatments as a whole was not significant. However, the Q 10 values had a tendency to decrease from summit to foot in tillage treatments, and no-tillage would reduce spatial variability of Q 10 values.

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Sensitivity of soil respiration to moisture and temperature

Cited by 47 publications

References 31 publications

Responses of peat carbon at different depths to simulated warming and oxidizing

Responses of peat carbon at different depths to simulated warming and oxidizing

Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting

Effect of No-Till Farming and Straw Mulch on Spatial Variability of Soil Respiration in Sloping Cropland

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