Significance of soil temperature and moisture for soil respiration in a Chinese mountain area

2008 ◽  
Vol 148 (3) ◽  
pp. 490-503 ◽  
Author(s):  
Hong-jian Li ◽  
Jun-xia Yan ◽  
Xiao-feng Yue ◽  
Meng-ben Wang
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Mountain Area ◽  
Soil Temperature And Moisture

scholarly journals Improvement of Soil Respiration Parameterization in a Dynamic Global Vegetation Model and Its Impact on the Simulation of Terrestrial Carbon Fluxes

2018 ◽  
Vol 32 (1) ◽  
pp. 127-143 ◽  
Author(s):  
Dongmin Kim ◽  
Myong-In Lee ◽  
Eunkyo Seo
Keyword(s):  
Spatial Distribution ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Vegetation Type ◽  
Carbon Fluxes ◽  
Decomposition Process ◽  
Spatial And Temporal Variation ◽  
In Situ Observation ◽  
Terrestrial Carbon ◽  
Soil Temperature And Moisture

Abstract The Q10 value represents the soil respiration sensitivity to temperature often used for the parameterization of the soil decomposition process has been assumed to be a constant in conventional numerical models, whereas it exhibits significant spatial and temporal variation in the observations. This study develops a new parameterization method for determining Q10 by considering the soil respiration dependence on soil temperature and moisture obtained by multiple regression for each vegetation type. This study further investigates the impacts of the new parameterization on the global terrestrial carbon flux. Our results show that a nonuniform spatial distribution of Q10 tends to better represent the dependence of the soil respiration process on heterogeneous surface vegetation type compared with the control simulation using a uniform Q10. Moreover, it tends to improve the simulation of the relationship between soil respiration and soil temperature and moisture, particularly over cold and dry regions. The modification has an impact on the soil respiration and carbon decomposition process, which changes gross primary production (GPP) through controlling nutrient assimilation from soil to vegetation. It leads to a realistic spatial distribution of GPP, particularly over high latitudes where the original model has a significant underestimation bias. Improvement in the spatial distribution of GPP leads to a substantial reduction of global mean GPP bias compared with the in situ observation-based reference data. The results highlight that the enhanced sensitivity of soil respiration to the subsurface soil temperature and moisture introduced by the nonuniform spatial distribution of Q10 has contributed to improving the simulation of the terrestrial carbon fluxes and the global carbon cycle.

scholarly journals Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0165212 ◽  
Author(s):  
Xiaoying Bao ◽  
Xiaoxue Zhu ◽  
Xiaofeng Chang ◽  
Shiping Wang ◽  
Burenbayin Xu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Soil Respiration ◽  
Soil Temperature ◽  
The Tibetan Plateau ◽  
Soil Temperature And Moisture

Climate factors mediate soil respiration dynamics in Mediterranean agricultural environments: an empirical approach

Soil Research ◽  
2014 ◽  
Vol 52 (6) ◽  
pp. 543 ◽  
Author(s):  
Sergio González-Ubierna ◽  
María Teresa de la Cruz ◽  
Miguel Ángel Casermeiro
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Coefficient Of Determination ◽  
Temperate Climate ◽  
Climate Factors ◽  
Simple Effect ◽  
Soil Co2 Emissions ◽  
Precipitation Pulses ◽  
Mediterranean Conditions ◽  
Soil Temperature And Moisture

Soil CO2 emissions, the result of soil respiration processes, may be essential in climate change modelling. The complex phenomenon of soil respiration is regulated by a range of mainly climate-related environmental factors. We tested the latest published empirical models in a field experiment in an agricultural soil under Mediterranean conditions. Soil respiration was monitored biweekly with a portable infrared gas analyser, and climate features were monitored for 1 year (2010–11). An additional rewetting assay (watering the soil) was done at the end of the experiment in summer when the soil water content was dry. We tested different approaches to represent the simple effect of climate factors on soil respiration and found Gaussian models to be the best. We also tested the most recent models designed to represent the synergic effects of climate factors, and our modification of the Martin and Bolstad model showed the best coefficient of determination. The results suggest that linear approaches and the use of a fixed Q10 value should be revised to represent climate and soil respiration relations, especially in high-variability environments where soil respiration variability is controlled by soil temperature and moisture interactions, while precipitation pulses induce CO2 emission peaks. Finally, our results showed that the influence of soil temperature and moisture on soil respiration is lower under Mediterranean conditions than in temperate climate types.

Spatial and temporal effects of soil temperature and moisture and the relation to fine root density on root and soil respiration in a mature apple orchard

2010 ◽  
Vol 342 (1-2) ◽  
pp. 195-206 ◽  
Author(s):  
Christian Ceccon ◽  
Pietro Panzacchi ◽  
Francesca Scandellari ◽  
Luca Prandi ◽  
Maurizio Ventura ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Fine Root ◽  
Apple Orchard ◽  
Root Density ◽  
Temporal Effects ◽  
Mature Apple ◽  
Fine Root Density ◽  
Soil Temperature And Moisture

Effects of Soil Temperature and Drought on Root–Soil Respiration in Apple under Field Conditions

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 453a-453
Author(s):  
Liqin Wang ◽  
David M. Eissenstat ◽  
Dora E. Flores-Alva
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Root Respiration ◽  
Hot Water ◽  
Field Conditions ◽  
Drought Treatment ◽  
Dry Soil ◽  
Heated Soil ◽  
Soil Temperature And Moisture

Root respiration is very important to root efficiency, root lifespan, and carbon cycling in plant ecosystems. Yet, the effects of soil temperature and moisture on root respiration are poorly understood, especially under field conditions. In this study, we manipulated soil temperature and moisture by six bearing `Red Chief' Delicious/M26 trees near State College, Pa. Soil temperature was elevated 5 °C at 5-cm depth using circulating hot water and stainless steel grids. Soil temperature was monitored using thermocouples and a data logger, and soil moisture was monitored using TDR. Root–soil respiration was determined by static trapping at the soil surface. Heating was conducted from 8 May to 28 Oct. Drought was initiated on 21 Aug. and lasted 2 months. Root–soil respiration was lowest in spring and increased from June to late August. After September, respiration decreased until the experiment ended in November. Root-soil respiration was not correlated with root length density. Heating enhanced root–soil respiration about 15% to 20% in spring (May) and 10% in summer (June–August). After the drought treatment began, heating increased root-soil respiration about 42% in wet soil, but did not influence respiration in dry soil. Heating accentuated the effect of the drought treatment on soil moisture. After 2 months of no irrigation and no rain, soil moisture was reduced 5% in unheated soil and 10% in heated soil. Drought slowed root–soil respiration 17% in unheated soil and 36% in heated soil, mainly because heating increased respiration in wet soil, but compared to the unheated treatment, had no effect in dry soil.

Does rhizosphere priming effect explain the greater soil respiration in well-watered and drought stressed maize?

2020 ◽  
Author(s):  
Khatab Abdalla ◽  
Mutez Ahmed ◽  
Johanna Pausch
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Root Exudates ◽  
Carbon Sink ◽  
Anthropogenic Activities ◽  
Agricultural Practice ◽  
Priming Effects ◽  
Soil Layers ◽  
Soil Temperature And Moisture

<p>The projected global warming risks due to high emissions of greenhouse gases, mainly from anthropogenic activities, increases the need for an agricultural practice with high carbon sink capacity and low water requirements without compromising on environment and productivity. On one hand, it’s well accepted that soil moisture directly affects microbial activity, whereas on the other hand, drought stress was recently postulated to increase root exudates, which in turn will accelerate soil organic matter mineralization “priming effects”. Thus, the objective of this study was to investigate the interplay between soil moisture (well-watered and drought stressed) and maize (Zea mays L.) root exudates on soil CO<sub>2</sub> efflux. The experiment consisted of three treatments, which are well-watered, drought stressed maize plus a control (without plants) lysimeters (1 m<sup>3</sup>), Soil CO<sub>2</sub> efflux, soil temperature and moisture content were measured weekly during the growing season (April to September) and monthly in the fallow period. Under well-watered conditions, the annual average of CO<sub>2</sub> efflux was 0.12 g CO<sub>2</sub>-C m<sup>-2</sup> hr<sup>-1</sup>, which was 24.5 and 20% significantly higher than under drought stressed and the control, respectively. Moreover, well-watered treatment had significantly greater primed carbon than drought stressed maize. Soil temperature in deeper soil layers (25, 50 and 75 cm) correlated positively (with the CO<sub>2</sub> efflux, while soil moisture correlated negatively at the 5 cm and 25 cm. Overall, these results suggested that the root exudates decreased under drought conditions, which decreasing soil respiration. Drought tolerance varieties could be an option to decrease soil respiration and maintain productivity.</p>

scholarly journals Response of Soil Respiration to Soil Temperature and Moisture in a 50-Year-Old Oriental Arborvitae Plantation in China

PLoS ONE ◽  
2011 ◽  
Vol 6 (12) ◽  
pp. e28397 ◽  
Author(s):  
Xinxiao Yu ◽  
Tianshan Zha ◽  
Zhuo Pang ◽  
Bin Wu ◽  
Xiaoping Wang ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Soil Temperature And Moisture

scholarly journals Improvement of Soil Respiration Parameterization in a Dynamic Global Vegetation Model and Its Impact on the Simulation of Terrestrial Carbon Fluxes

2017 ◽  
Author(s):  
Dongmin Kim ◽  
Myong-In Lee ◽  
Eunkyo Seo
Keyword(s):  
Spatial Distribution ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Numerical Models ◽  
Gross Primary Production ◽  
Substantial Reduction ◽  
Observation Data ◽  
Terrestrial Carbon ◽  
Dynamic Global Vegetation Model ◽  
Soil Temperature And Moisture

Abstract. Soil decomposition is one of the critical processes for maintaining a terrestrial ecosystem and the global carbon cycle. The sensitivity of soil respiration (Rs) to temperature, the so-called Q10 value, is required for parameterizing the soil decomposition process and is assumed to be a constant in conventional numerical models, while realistically it is not in cases of spatiotemporal heterogeneity. This study develops a new parameterization method for determining Q10 by considering the soil respiration dependence on soil temperature and moisture obtained by multiple regression. This study further investigates the impacts of the new parameterization on the global terrestrial carbon flux. Our results show that non-uniform spatial distribution of Q10 tends to represent the dependence of the soil respiration process on heterogeneous surface vegetation type compared with the control simulation using a uniform Q10. Moreover, it tends to improve the simulation of the observed relationship between soil respiration and soil temperature and moisture, particularly over cold and dry regions. The new parameterization improves the simulation of gross primary production (GPP). It leads to a more realistic spatial distribution of GPP, particularly over high latitudes (60–80 N) where the original model has a significant underestimation bias. In addition, overestimation bias of GPP in the tropics and the midlatitudes is significantly reduced. Improvement in the spatial distribution of GPP leads to a substantial reduction of global mean bias of GPP from +9.11 to +1.68 GtC yr−1 compared with the FLUXNET-MTE observation data.

scholarly journals Impact of Soil Temperature and Moisture on Soil Respiration under Different Cropping Patterns in Arid Oasis Area

Our Nature ◽  
2012 ◽  
Vol 9 (1) ◽  
pp. 1-8
Author(s):  
A.Z. Qin ◽  
G.B. Huang ◽  
Q. Chai ◽  
A.Z. Yu ◽  
S.B. Liu
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Cropping Pattern ◽  
Co2 Fluxes ◽  
Cropping Patterns ◽  
Dynamic Chamber ◽  
Q10 Values ◽  
Good Productivity ◽  
Oasis Area ◽  
Soil Temperature And Moisture

A dynamic chamber method was used to measure soil respiration under four intercropping patterns and five monocropping patterns from April to September, 2009 and 2010. Soil temperature and moisture were measured to analyze correlations to soil respiration. Q10 values varied from 1.23 to 2.18, with minimum value for sole wheat and maximum value for maize//pea; optimum moisture for soil respiration ranging from 0.13 to 0.21m3m-3. Soil respiration of summer harvesting crops (wheat, rape and pea) was more sensitive to moisture while that of autumn harvesting crops (maize and Soyabean) was more to temperature. Ratios of biomass and yield to seasonal CO2 fluxes for sole wheat were 32.6-40.1 kg/kg and 13.2-14.5 kg/kg, respectively, showing wheat was the crop that emitted less CO2 but had good productivity. It was concluded that wheat//maize was recommended cropping pattern considering both lower CO2 fluxes and higher production.DOI: http://dx.doi.org/10.3126/on.v9i1.5723

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