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Effect of simulated acid rain on CO₂, CH₄ and N₂O fluxes and rice productivity in a subtropical Chinese paddy field
Wang, Chun (Fujian Normal University. Institute of Geography)
Wang, Weiqi (Fujian Normal University. Institute of Geography)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals)
An, Wanli (Fujian Normal University. Institute of Geography)
Zeng, Congsheng (Fujian Normal University. Institute of Geography)
Abid, Abbas Ali (Zhejiang University. Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Fecha: 2018
Resumen: The need of more food production, an increase in acidic deposition and the large capacity of paddy to emit greenhouse gases all coincide in several areas of China. Studying the effects of acid rain on the emission of greenhouse gases and the productivity of rice paddies are thus important, because these effects are currently unknown. We conducted a field experiment for two rice croppings (early and late paddies independent experiment) to determine the effects of simulated acid rain (control, normal rain, and treatments with rain at pH of 4. 5, 3. 5 and 2. 5) on the fluxes of CO₂, CH₄ and N₂O and on rice productivity in subtropical China. Total CO₂ fluxes at pHs of 4. 5, 3. 5 and 2. 5 were 10. 3, 9. 7 and 3. 2% lower in the early paddy and 28. 3, 14. 8 and 6. 8% lower in the late paddy, respectively, than the control. These differences from the control were significant for pH 3. 5 and 4. 5. Total CH₄ fluxes at pHs of 4. 5, 3. 5 and 2. 5 were 50. 4, 32. 9 and 25. 2% lower in the early paddy, respectively, than the control. pH had no significant effect on CH4 flux in the late paddy or for total (early + late) emissions. N₂O flux was significantly higher at pH 2. 5 than 3. 5 and 4. 5 but did not differ significantly from the flux in the control. Global-warming potentials (GWPs) were lower than the control at pH 3. 5 and 4. 5 but not 2. 5, whereas rice yield was not appreciably affected by pH. Acid rain (between 3. 5 and 4. 5) may thus significantly affect greenhouse gases emissions by altering soil properties such as pH and nutrient pools, whereas highly acidic rain (pH 2. 5) could increase GWPs (but not significantly), probably partially due to an increase in the production of plant litter.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció MINECO/CGL2016‐79835-P
Nota: Número d'acord de subvenció AGAUR/2017/SGR-1005
Derechos: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Lengua: Anglès.
Documento: article ; recerca ; acceptedVersion
Materia: Paddy ; Greenhouse gases ; Acid rain ; Rice productivity
Publicado en: Environmental pollution, Vol. 243, part B (Dec. 2018) , p. 1196-1205, ISSN 0269-7491

DOI: 10.1016/j.envpol.2018.08.103


Disponible a partir de: 2020-12-30
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El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registro creado el 2019-03-25, última modificación el 2019-04-09



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