Soil respiration and its temperature sensitivity in agricultural and afforested poplar plantation systems in northern Alberta

Chang, Scott X.; Shi, Zheng; Thomas, Barb R.

doi:10.1007/s00374-016-1104-x

Cited by 30 publications

(19 citation statements)

References 58 publications

(83 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, SOC at different depths had different responses to changes in soil temperature, owing to the difference in SOC stability and microbial selectivity to C utilization [ 53 ]. Research has pointed out that deeper soil layers are less temperature-sensitive than upper soil layers [ 44 ], and suggested that the change of Q 10 with depths was related to substrate availability [ 16 ].…”

Section: Discussionmentioning

confidence: 99%

Dynamics of soil organic carbon mineralization in tea plantations converted from farmland at Western Sichuan, China

Zhu

Zheng

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

Climate warming and land use change are some of the drivers affecting soil organic carbon (SOC) dynamics. The Grain for Green Project, local natural resources, and geographical conditions have resulted in farmland conversion into tea plantations in the hilly region of Western Sichuan. However, the effect of such land conversion on SOC mineralization remains unknown. In order to understand the temperature sensitivity of SOC decomposition in tea plantations converted from farmland, this study considered the different years (i.e., 2–3, 9–10, and 16–17 years) of tea plantations converted from farmland as the study site, and soil was incubated for 28 days at 15°C, 25°C, and 35°C to measure the soil respiration rate, amount, and temperature coefficient (Q10). Temperature and land use type interactively affected the SOC mineralization rate, and the cumulative amount of SOC mineralization in all the plots was the largest at 35°C. SOC mineralization was greater and more sensitive to temperature changes in the farmland than in the tea plantations. Compared with the control, tea plantation soils showed lower SOC mineralization rate and cumulative mineralization amount. The 16–17-year-old tea plantation with a low SOC mineralization amount and high SOC content revealed the benefits of carbon sequestration enhancement obtained by converting farmland into tea plantations. The first-order kinetic equation described SOC mineralization dynamics well. Farmland conversion into tea plantations appeared to reduce the potentially mineralizable carbon pool, and the age of tea plantations also had an effect on the SOC mineralization and sequestration. The relatively weak SOC mineralization temperature sensitivity of the tea plantation soils suggested that the SOC pool of the tea plantation soils was less vulnerable to warming than that of the control soils.

show abstract

Section: Discussionmentioning

confidence: 99%

Dynamics of soil organic carbon mineralization in tea plantations converted from farmland at Western Sichuan, China

Zhu

Zheng

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…The amount of carbon dioxide (CO 2 ) released through soil respiration can reach 68–100 Pg C each year [ 1 ], and slight changes in soil respiration can significantly alter CO 2 concentrations in the atmosphere [ 2 , 3 ]. It is well known that a complex array of biotic and environmental factors, such as temperature, precipitation, soil moisture, root biomass, oxygen, changes in microbial C use efficiency and substrate availability, affect soil respiration [ 4 – 7 ].…”

Section: Introductionmentioning

confidence: 99%

Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

et al. 2018

View full text Add to dashboard Cite

Soil respiration is the second largest terrestrial carbon (C) flux; the responses of soil respiration to nitrogen (N) deposition have far-reaching influences on the global C cycle. N deposition has been documented to significantly affect soil respiration, but the results are conflicting. The response of soil respiration to N deposition gradients remains unclear, especially in ecosystems receiving increasing ambient N depositions. A field experiment was conducted in a natural evergreen broadleaf forest in western China from November 2013 to November 2015 to understand the effects of increasing N deposition on soil respiration. Four levels of N deposition were investigated: control (Ctr, without N added), low N (L, 50 kg N ha−1·a−1), medium N (M, 150 kg N ha−1·a−1), and high N (H, 300 kg N ha−1·a−1). The results show that (1) the mean soil respiration rates in the L, M, and H treatments were 9.13%, 15.8% (P < 0.05) and 22.57% (P < 0.05) lower than that in the Ctr treatment (1.56 ± 0.13 μmol·m−2·s−1), respectively; (2) soil respiration rates showed significant positive exponential and linear relationships with soil temperature and moisture (P < 0.01), respectively. Soil temperature is more important than soil moisture in controlling the soil respiration rate; (3) the Ctr, L, M, and H treatments yielded Q10 values of 2.98, 2.78, 2.65, and 2.63, respectively. N deposition decreased the temperature sensitivity of soil respiration; (4) simulated N deposition also significantly decreased the microbial biomass C and N, fine root biomass, pH and extractable dissolved organic C (P < 0.05). Overall, the results suggest that soil respiration declines in response to N deposition. The decrease in soil respiration caused by simulated N deposition may occur through decreasing the microbial biomass C and N, fine root biomass, pH and extractable dissolved organic C. Ongoing N deposition may have significant impacts on C cycles and increase C sequestration with the increase in global temperature in evergreen broadleaf forests.

show abstract

“…3 Soil respiration can exhibit seasonal and daily variations. 56 Chang et al 57 suggested that soil temperature represents most of the seasonal variation in basal soil respiration. The efflux of carbon dioxide from the soil is a combination of two factors: (I) respiration from the rhizosfere, including root respiration and respiration coming from the metabolism of the rhizosphere deposits, and (II) microbial decomposition of soil organic matter.…”

Section: Discussionmentioning

confidence: 99%

Plant species identity and richness influence microbial respiration of soil microorganisms on various functional groups in northeastern Patagonia, Argentina

Cardillo¹,

Busso²,

Ambrosino³

et al. 2018

BIJ

View full text Add to dashboard Cite

Studies on basal soil respiration (i.e., under undisturbed conditions) are very important because they can be used as indirect indicators of the biological activity in those soils; this ecological process is recognized as the major source of carbon flux from the soil surface, and one of the crucial components of the carbon cycle in terrestrial ecosystems. The objectives of this study were to determine the microbial respiration of soil microorganisms at various levels of plant species richness and developmental morphology stages in various perennial grass (Nassella longiglumis, N. tenuis, Amelichloa ambigua), and herbaceous (Atriplex semibaccata) and woody (Larrea divaricata, Schinus fasciculatus) dicots grown in experimental plots during 2013 and 2014. There were 54 experimental plots. On each of 6 blocks, there was a plot (1.25x1.25m) for each of the 6 species (monocultures) and one plot each having combinations of 2, 4 or 6 species. Six hundred and twenty nine plants were reserved to replace dead plants in the plots [629+1944 plants from the plots (54 plots x 36 plants per plot)=2573 plants in total]. An auger (3 cm diameter, 20 cm length), was used to obtain six replicate root + soil samples at each of four sampling times during those years. Basal soil respiration was similar (p>0.05) or greater (p<0.05), but ever lower, as plant species richness increased. Our results demonstrated that the plant species differences in microbial respiration in the experimental plots were species richness-, developmental morphology stage-, and sampling-time dependents.

show abstract

Soil respiration and its temperature sensitivity in agricultural and afforested poplar plantation systems in northern Alberta

Cited by 30 publications

References 58 publications

Dynamics of soil organic carbon mineralization in tea plantations converted from farmland at Western Sichuan, China

Dynamics of soil organic carbon mineralization in tea plantations converted from farmland at Western Sichuan, China

Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

Plant species identity and richness influence microbial respiration of soil microorganisms on various functional groups in northeastern Patagonia, Argentina

Contact Info

Product

Resources

About