Microbial biomass, and dissolved organic carbon and nitrogen strongly affect soil respiration in different land uses: A case study at Three Gorges Reservoir Area, South China

Iqbal, Javed; Hu, Ronggui; Feng, Minglei; Lin, Shan; Malghani, Saadatullah; Ali, Ibrahim Mohamed

doi:10.1016/j.agee.2010.02.015

Cited by 177 publications

(86 citation statements)

References 52 publications

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“…Generally, our results were in agreement with Lou et al (2007) who found that soil CO 2 fluxes positively correlated with DOC and MBC (r = 0.764 and 0.981 at p \ 0.05 and 0.01, respectively) after 55 days from the experiment beginning. In another study, Iqbal et al (2010) found positive relationships between CO 2 fluxes and DOC and MBC (r = 0.799 and 0.533 at p \ 0.05) in a field experiment which was conducted on upland soil transferred from paddy at the experimental station of Zigui County, Three Gorges Reservoir Area, southern China. Bhattacharyya et al (2012) also found significant correlations between SOC, MBC, readily mineralizable carbon (RMC), and CO 2 emissions (r = 0.93, 0.92, and 0.96 at p \ 0.01, respectively) after the application of rice straw and green manure in a paddy sandy clay loam soil in Cuttack City at the eastern part of India.…”

Section: Data Inmentioning

confidence: 99%

Changes of CO2 emission and labile organic carbon as influenced by rice straw and different water regimes

Ibrahim

Cao

Zhan

et al. 2013

Int. J. Environ. Sci. Technol.

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Crop residues under different water regimes can cause significant alterations in soil organic carbon fractions, and in turn, soil-atmospheric carbon dioxide (CO 2 ) emissions. To evaluate the effect of rice straw application on CO 2 emissions and labile organic carbon fractions under different water regimes, an incubation experiment was conducted for 90 days. Ten treatments were developed from the interaction between five water levels (100, 85, 70, 55, and 40 % of water-holding capacity (WHC)) with and without incorporation of rice straw. Peaks of CO 2 fluxes were observed after 13 days of rice straw incorporation, which decreased gradually till the end of the incubation period. The incorporation of rice straw caused significant increases in CO 2 fluxes by 2.77-2.83 times from the paddy soil. In the presence of rice straw, the highest CO 2 fluxes were generally observed at W3 (70 % of WHC), whereas the lowest fluxes were occurred at W1 (100 % of WHC). Addition of rice straw under a range of water regimes markedly improved the transformation of soil organic carbon and labile organic carbon pools such as dissolved organic carbon, microbial biomass carbon, light fraction organic carbon, particulate organic carbon, and permanganate oxidizable carbon. The significant correlations between all labile soil organic carbon fractions and CO 2 concentrations confirmed their important roles in the emission of CO 2 from the paddy soil. In summary, the results suggest that light fraction organic carbon, particulate organic carbon, and permanganate oxidizable carbon were more sensitive indicators for CO 2 emissions and organic matter alterations as compared to other carbon fractions.

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Section: Data Inmentioning

confidence: 99%

Changes of CO2 emission and labile organic carbon as influenced by rice straw and different water regimes

Ibrahim

Cao

Zhan

et al. 2013

Int. J. Environ. Sci. Technol.

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show abstract

“…Microbial biomass was the only characteristic that showed the same pattern as the respiration rates (Table 1). Soil microbial biomass is closely related to soil fertility and is considered as sensitive indicator of soil quality (Iqbal et al, 2010). Lower respiration rates in AG soil might be impact of low available carbon pool (Table 1) as substrate limitation may cause stability in SOC (Marschner et al, 2008).…”

Section: Behavior Of Amendments In Different Soilsmentioning

confidence: 99%

Chars produced by slow pyrolysis and hydrothermal carbonization vary in carbon sequestration potential and greenhouse gases emissions

Malghani

Gleixner

Trumbore

2013

Soil Biology and Biochemistry

Self Cite

169

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Bio-char, biomass that has been deliberately charred to slow its rate of decomposition, has been proposed as an amendment with the potential to sequester carbon and improve certain soil properties. Slow pyrolysis (temperature 500 C) and hydrothermal carbonization (low temperature, high pressure) are two efficient methods to produce bio-char with high yield and are applicable to a broad range of feedstocks. Chars made using slow pyrolysis (PC) and hydrothermal carbonization (HTC) of the same feedstock material (corn, C4) differed in physical appearance, chemical properties and decomposition behavior. We added these HTC and PC chars as amendments to three soils with C3-derived organic matter that differed in clay content, pH, and land use (managed spruce forest, unmanaged deciduous forest and agriculture), and compared their impacts on carbon sequestration and net greenhouse gas (CO 2 , 13 CO 2 , N 2 O and CH 4 ) emissions. HTC addition (1% w/w) significantly increased CO 2 emissions in all three soils (p < 0.001), with much of the extra C derived from HTC decomposition. In contrast, PC addition (1% w/w) had almost no impact on deciduous forest soil and actually decreased CO 2 emission from the agricultural soil. HTC treatment resulted in increased CH 4 emission from all soils but reduced N 2 O fluxes in the agricultural and spruce forest soils. PC amendment had no significant effect on CH 4 emission, and resulted in intermediate levels of N 2 O emission (between control and HTC treatments). Although both HTC and PC chars were produced from the same feedstock, PC had markedly higher potential for carbon sequestration than HTC.

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“…So, it is interesting to mention that temperature had major effects on soil biological properties. It was detected by Iqbal et al (2010) and Hassan et al (2015) that the increase of temperature degree led to significant variations in soil biological properties such as MBC, MBN, catalase and total microbial counts (bacteria and fungi). The smallest values of soil biological properties that detected at the harvest of wheat in our study were probably resulted from the decrease of soil organic matter and different nutrients releasing as well as root exudates at plant maturity stage.…”

Section: Res J Soil Biol 7 (3): 72-83 2015mentioning

confidence: 99%

Microbiological Indicators of a Clayey Soil Planted with Wheat (Triticum aestivum L.) as Affected by Potassium Fertilization and Different Water Regimes

Ali¹,

Meihy²

2015

Research J. of Soil Biology

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Microbial biomass, and dissolved organic carbon and nitrogen strongly affect soil respiration in different land uses: A case study at Three Gorges Reservoir Area, South China

Cited by 177 publications

References 52 publications

Changes of CO2 emission and labile organic carbon as influenced by rice straw and different water regimes

Changes of CO2 emission and labile organic carbon as influenced by rice straw and different water regimes

Chars produced by slow pyrolysis and hydrothermal carbonization vary in carbon sequestration potential and greenhouse gases emissions

Microbiological Indicators of a Clayey Soil Planted with Wheat (Triticum aestivum L.) as Affected by Potassium Fertilization and Different Water Regimes

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