Soil respiration soc

Microbial respiration soil respiration is defined as oxygen uptake or carbon dioxide evolution by bacteria, fungi, soil respiration soc, algae and protozoans, and includes the gas exchange of aerobic and anaerobic metabolism Anderson

Although many studies have reported net gains of soil organic carbon SOC after afforestation on croplands, this is uncertain for Chinese paddy rice croplands. Here, we aimed to evaluate the effects of afforestation of paddy rice croplands on SOC sequestration and soil respiration R s. Such knowledge would improve our understanding of the effectiveness of various land use options on greenhouse gas mitigation in China. The investigation was conducted on the Chongming Island, north subtropical China. Field sites were reclaimed from coastal salt marshes in the s, and soils were homogeneous with simple land use histories. SOC stocks and R s levels were monitored over one year in a paddy rice cropland, an evergreen and a deciduous broad-leaved plantation established on previous paddy fields and a reference fallow land site never cultivated. Laboratory incubation of soil under fast-changing temperatures was used to compare the temperature sensitivity Q 10 of SOC decomposition across land uses.

Soil respiration soc

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Changes in soil organic carbon SOC stability may alter carbon release from the soil and, consequently, atmospheric CO 2 concentration. The mean annual temperature MAT can change the soil physico-chemical characteristics and alter the quality and quantity of litter input into the soil that regulate SOC stability. However, the relationship between climate and SOC stability remains unclear. Soil respiration during the incubation fitted well to a three-pool labile, intermediate and stable SOC decomposition model. The intermediate carbon pool contributed dominantly to cumulative carbon release. The size of the intermediate pool was strongly related to the percentage of sand particle. The decomposition rate of the intermediate pool was negatively related to soil nitrogen availability. Because both soil texture and nitrogen availability are temperature independent, the stability of SOC was not associated with the MAT, but was heavily influenced by the intrinsic processes of SOC formation and the nutrient status.

Previous studies have generally concluded that soil erosion leads to a terrestrial carbon loss due to the breakdown of structural aggregates and lower productivity in the eroding areas resulting from decreased soil nutrient Jacinthe et al. Provided by the Springer Nature SharedIt content-sharing initiative, soil respiration soc. Shifts in vegetation types may profoundly affect soil respiration soc dynamics of soil respiration and SOC by influencing soil microclimate and the production and transfer of aboveground photosynthate to belowground [23][24][25][26][27].

Ecological Processes volume 8 , Article number: 28 Cite this article. Metrics details. Although soil erosion plays a key role in the carbon cycle, a holistic and mechanistic understanding of the soil erosion process within the cycle is still lacking. The aim of this study was therefore to improve our mechanistic understanding of soil organic carbon SOC and soil respiration dynamics through an experiment conducted in an eroding black soil farmland landscape in Northeast China. The depositional profiles store 5. Furthermore, the fractions of intermediate C and the microaggregate C were lowest at the eroding position and highest at the depositional position. In the depositional topsoil, the input of labile materials plays a promotional role in soil respiration.

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Because soil respiration RS is the primary mechanism through which soil carbon is released into the atmosphere at a global scale, investigating the dynamic characteristics of the soil respiration rate in reclaimed coastal wetlands is necessary to understand its important role in maintaining the global C cycle. In the present study, seasonal and diurnal changes in soil respiration were monitored in one bare wetland CK and two reclaimed wetlands CT, a cotton monoculture pattern, and WM, a wheat—maize continuous cropping pattern in the Yellow River Delta. At the diurnal scale, the RS at the three study sites displayed single-peak curves, with the lowest values occurring at midnight a.

Soil respiration soc

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. The soil microbiome governs biogeochemical cycling of macronutrients, micronutrients and other elements vital for the growth of plants and animal life. Understanding and predicting the impact of climate change on soil microbiomes and the ecosystem services they provide present a grand challenge and major opportunity as we direct our research efforts towards one of the most pressing problems facing our planet.

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We mainly focus on the SOC stocks and soil respiration dynamics in this study. Google Scholar Fissore, C. The order of SOC concentrations across land uses was depth dependent. Soil Biol Biochem 33 : — Tellus 51B : — This would influence the calculation of regional carbon balance in China. View Article Google Scholar 9. Seasonal increase of SOC was observed during the rice-growing period in croplands but not in afforested soils, suggesting a stronger SOC sequestration by paddy rice cropping. We also conducted SOC fractionation experiments for the soil layers L1: 0—10, L3: 20—30, and L5: 50—70, and for the depositional position, L6: 70—90 cm was added at these four topographic positions Fig. The proportion of variation explained from principal component analysis on the seven environmental variables. This work is licensed under a Creative Commons Attribution 4. The herbaceous layer of Siberian crabapple is dominated by Veronica linariifolia Pall.

Forest Ecosystems volume 6 , Article number: 1 Cite this article.

Natural and anthropogenic-induced vegetation-type conversions are among the most important components of global changes [7]. Here, we aimed to evaluate the effects of afforestation of paddy rice croplands on SOC sequestration and soil respiration R s. The responses of R h or specific R h to temperature showed similar patterns between land uses, and hence only the Q 10 of R h was estimated Table 2. Total Views 2, Because regional aspects of the global carbon cycle are drawing increasing scientific and political interest, there is a strong impetus to better understand how land use change effects China's carbon balance [32] , [33] , [34]. Glob Change Biol 16 : — More metrics information. Researches on nutrient return of litterfall in the alpine tundra ecosystem of Changbai Mountains. Figure 5. For incubation, we used only surface soils 0—20cm collected from all land uses in December , i.