| Registro completo |
| Provedor de dados: |
NWISRL
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| País: |
United Kingdom
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| Título: |
Hardwood biochar influences calcareous soil physicochemical and microbiological status
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| Autores: |
Ippolito, J.A.
Stromberger, M.E.
Lentz, R.D.
Dungan, R.S.
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| Data: |
2014
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| Ano: |
2014
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| Palavras-chave: |
Calcareous soil
Nitrogen
Nutrients
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| Resumo: |
The effects of biochar application to calcareous soils are not well documented. In a laboratory incubation study, a hardwood-based, fast pyrolysis biochar was applied (0, 1, 2, and 10% by weight) to a calcareous soil. Changes in soil chemistry, water content, microbial respiration, and microbial community structure were monitored over a 12-month period. Increasing biochar application rate increased the water holding capacity of the soil-biochar blend, a trait that could be beneficial under water limited situations. Biochar application also caused an increase in plant-available iron and manganese, soil carbon content, soil respiration rates, bacterial populations, and a decrease in soil nitrate-nitrogen concentration. Biochar rates of 2 and 10% altered the relative proportions of bacterial and fungal fatty acids, and shifted the microbial community towards greater relative amounts of bacteria and less fungi. The ratio of fatty acid 19:0 cy to its precursor, 18:1'7c, was higher in 10% biochar rate soil than all other soils, potentially indicating an environmental stress response. The 10% application rate of this particular biochar was extreme, causing the greatest change in microbial community structure, a physiological response to stress in Gram-negative bacteria, and a drastic reduction in soil nitate-nitrogen (85-97% reduction compared to the control), all of which were sustained over time.
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| Tipo: |
Article
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| Identificador: |
http://eprints.nwisrl.ars.usda.gov/1532/1/1490.pdf
Ippolito, J.A. and Stromberger, M.E. and Lentz, R.D. and Dungan, R.S. (2014) Hardwood biochar influences calcareous soil physicochemical and microbiological status. Journal of Environmental Quality. 43(2):681-689.
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| Relação: |
http://eprints.nwisrl.ars.usda.gov/1532/
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| Formato: |
application/pdf
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