Combined application of biochar and N increased temperature sensitivity of soil respiration but still decreased the soil CO2 emissions in moso bamboo plantations

2020 ◽  
Vol 730 ◽  
pp. 139003
Author(s):  
Xiaogai Ge ◽  
Yonghui Cao ◽  
Benzhi Zhou ◽  
Wenfa Xiao ◽  
Xiaokun Tian ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Co2 Emissions ◽  
Temperature Sensitivity ◽  
Moso Bamboo ◽  
Soil Co2 ◽  
Combined Application ◽  
Increased Temperature ◽  
Soil Co2 Emissions

scholarly journals The Linkage of Soil CO2 Emissions in a Moso Bamboo (Phyllostachysedulis (Carriere) J. Houzeau) Plantation with Aboveground and Belowground Stoichiometry

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1052
Author(s):  
Xiaokun Tian ◽  
Xiaogai Ge ◽  
Benzhi Zhou ◽  
Maihe Li
Keyword(s):  
Soil Respiration ◽  
Co2 Emissions ◽  
Respiration Rate ◽  
Forest Growth ◽  
Moso Bamboo ◽  
Mediating Effect ◽  
Soil Co2 ◽  
Soil Respiration Rate ◽  
Soil Stoichiometry ◽  
Soil Co2 Emissions

Understanding the effects of soil stoichiometry and nutrient resorption on soil CO2 emissions is critical for predicting forest ecosystem nutritional demands and limitations tooptimal forest growth. In this study, we examined the effects of above- and belowground stoichiometry on soil CO2 emissions and their mediating effect on soil respiration in subtropical moso bamboo (Phyllostachys edulis) plantations. Our results showed that the soil respiration rate did not differ significantly among four bamboo stands. Nitrogen (N) and phosphorous (P) concentrations were higher in bamboo leaves than litter, whereas the C:N and C:P ratios showed the opposite trend. Significant positive correlations of soil cumulative CO2 emission with litter C:P (p = 0.012) and N:P (p = 0.041) ratios indicated that litter stoichiometry was a better predictor of soil respiration than aboveground stoichiometry. Cumulative soil CO2 emissions were significantly negatively correlated with soil microbe C:N (p = 0.021) and C:N (p = 0.036) ratios, and with soil respiratory quotients (p < 0.001). These results suggest that litter and soil stoichiometry are reliable indicators of the soil respiration rate. This study provides important information about the effects of ecosystem stoichiometry and soil microbial biomass on soil CO2 emissions and highlights them editing role of soil nutritional demands and limitations in the association between soil respiration rates and aboveground plant tissues.

Biochar addition increases subsurface soil microbial biomass but has limited effects on soil CO2 emissions in subtropical moso bamboo plantations

2019 ◽  
Vol 142 ◽  
pp. 155-165 ◽  
Author(s):  
Xiaogai Ge ◽  
Yonghui Cao ◽  
Benzhi Zhou ◽  
Xiaoming Wang ◽  
Zhenya Yang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Co2 Emissions ◽  
Soil Microbial Biomass ◽  
Moso Bamboo ◽  
Soil Co2 ◽  
Soil Microbial ◽  
Subsurface Soil ◽  
Soil Co2 Emissions

Physical protection of soil carbon in macroaggregates does not reduce the temperature dependence of soil CO2 emissions

2015 ◽  
Vol 178 (4) ◽  
pp. 592-600 ◽  
Author(s):  
Tiphaine Chevallier ◽  
Kaouther Hmaidi ◽  
Ernest Kouakoua ◽  
Martial Bernoux ◽  
Tahar Gallali ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Soil Carbon ◽  
Co2 Emissions ◽  
Soil Co2 ◽  
Physical Protection ◽  
Soil Co2 Emissions

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 Soil CO2 Emissions as Affected by 20-Year Continuous Cropping in Mollisols

2014 ◽  
Vol 13 (3) ◽  
pp. 615-623 ◽  
Author(s):  
Meng-yang YOU ◽  
Ya-ru YUAN ◽  
Lu-jun LI ◽  
Yan-li XU ◽  
Xiao-zeng HAN
Keyword(s):  
Co2 Emissions ◽  
Continuous Cropping ◽  
Soil Co2 ◽  
Soil Co2 Emissions

scholarly journals CO2 Flux and C Balance due to the Replacement of Bare Soil with Agro-Ecological Service Crops in Mediterranean Environment

Agriculture ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 71 ◽  
Author(s):  
Emanuele Radicetti ◽  
O. Osipitan ◽  
Ali Langeroodi ◽  
Sara Marinari ◽  
Roberto Mancinelli
Keyword(s):  
Organic Matter ◽  
Co2 Emissions ◽  
Oilseed Rape ◽  
Soil Characteristics ◽  
Cold Period ◽  
Soil Co2 ◽  
Mediterranean Environment ◽  
Hairy Vetch ◽  
Ecological Service ◽  
Soil Co2 Emissions

Intensive agriculture practices often results in decomposition of organic matter, thus causing soil CO2 emissions. Agro-ecological service crop could be profitably cultivated to improve soil characteristics and reduce CO2 emissions under Mediterranean environment. Two-year field trials were conducted in central Italy. The treatments were three agro-ecological service crops (hairy vetch, oat, and oilseed rape) and a no-service cover. Plant development, soil characteristics, and CO2 emissions were measured. Oat and oilseed rape showed a rapid growth, while hairy vetch started to grow rapidly only after the cold period. Soil CO2 emissions trend was similar among the agro-ecological service crops and tended to decrease during the cold period, then gradually increased until April when warm temperatures were observed. The high soil CO2 emissions and respiration index observed in hairy vetch probably stimulated mineral nutrients, especially nitrogen, to become more available in the soil compared to oat and oilseed rape throughout the decomposition of soil organic matter. These results confirmed that the cultivation of agro-ecological service crops, especially hairy vetch, could represent a suitable strategy for enhancing carbon sequestration and lead to a mitigation of CO2 emissions during the fallow period and could thus contribute to the climate change mitigation.

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