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Nutrient dynamics in tropical acid soils amended with wood ash

(2000) AGROCHIMICA. 44(5-6). p.197-210
Author
Organization
Abstract
Sustained growth and yield can be achieved when adequate quantities of nutrients are regularly returned to the soil. The effects of wood ash and lime on the dynamics of soil nutrients were studied in the laboratory using columns of mixed samples of topsoils from three tropical acid soils (Kandiudult). Amendments were applied to attain 80% base saturation and at amount corresponding to I and 2 times the content of exchangeable Al. The soil columns were leached for a period of 90 days with an amount of deionised water equivalent to the annual rainfall. Available nutrients in the soil was measured with NH(4)OAcEDTA pH 4.65 extract. In general, wood ash affected leachate composition more than lime. Application of wood ash led to increases in concentrations of DOG, NO3, SO4, Ca, Mg and K in the leachates and losses increased with wood ash application rates. Available Ca in the soil subsequent to leaching increased with both wood ash and lime, while available Mg and K increased with wood ash but was not affected with lime. Increases in the leached and available Ca, Mg and K were significant with wood ash application compared to liming. In this particular experimental conditions, an annual maintenance dressing with wood ash of 4.6 t.ha(-1) in soil Mb, 5.7 t.ha(-1) in soil Me and 4.3 t.ha(-1) in soil Nk would provide enough Ca to compensate losses. However, when taking into account simultaneous additions of Mg and K with wood ash, only their leaching losses can be recovered. Therefore, adequate supplementation with ME and K fertilisers is still needed to obtain maximum crop yield for the next growth cycle.
Keywords
BOILER ASH, FOREST SOILS, PHOSPHORUS, LIME, GROWTH

Citation

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Chicago
Voundi Nkana, JC, Alex Demeyer, and Marc Verloo. 2000. “Nutrient Dynamics in Tropical Acid Soils Amended with Wood Ash.” Agrochimica 44 (5-6): 197–210.
APA
Voundi Nkana, J., Demeyer, A., & Verloo, M. (2000). Nutrient dynamics in tropical acid soils amended with wood ash. AGROCHIMICA, 44(5-6), 197–210.
Vancouver
1.
Voundi Nkana J, Demeyer A, Verloo M. Nutrient dynamics in tropical acid soils amended with wood ash. AGROCHIMICA. 2000;44(5-6):197–210.
MLA
Voundi Nkana, JC, Alex Demeyer, and Marc Verloo. “Nutrient Dynamics in Tropical Acid Soils Amended with Wood Ash.” AGROCHIMICA 44.5-6 (2000): 197–210. Print.
@article{167971,
  abstract     = {Sustained growth and yield can be achieved when adequate quantities of nutrients are regularly returned to the soil. The effects of wood ash and lime on the dynamics of soil nutrients were studied in the laboratory using columns of mixed samples of topsoils from three tropical acid soils (Kandiudult). Amendments were applied to attain 80\% base saturation and at amount corresponding to I and 2 times the content of exchangeable Al. The soil columns were leached for a period of 90 days with an amount of deionised water equivalent to the annual rainfall. Available nutrients in the soil was measured with NH(4)OAcEDTA pH 4.65 extract. In general, wood ash affected leachate composition more than lime. Application of wood ash led to increases in concentrations of DOG, NO3, SO4, Ca, Mg and K in the leachates and losses increased with wood ash application rates. Available Ca in the soil subsequent to leaching increased with both wood ash and lime, while available Mg and K increased with wood ash but was not affected with lime. Increases in the leached and available Ca, Mg and K were significant with wood ash application compared to liming. In this particular experimental conditions, an annual maintenance dressing with wood ash of 4.6 t.ha(-1) in soil Mb, 5.7 t.ha(-1) in soil Me and 4.3 t.ha(-1) in soil Nk would provide enough Ca to compensate losses. However, when taking into account simultaneous additions of Mg and K with wood ash, only their leaching losses can be recovered. Therefore, adequate supplementation with ME and K fertilisers is still needed to obtain maximum crop yield for the next growth cycle.},
  author       = {Voundi Nkana, JC and Demeyer, Alex and Verloo, Marc},
  issn         = {0002-1857},
  journal      = {AGROCHIMICA},
  keyword      = {BOILER ASH,FOREST SOILS,PHOSPHORUS,LIME,GROWTH},
  language     = {eng},
  number       = {5-6},
  pages        = {197--210},
  title        = {Nutrient dynamics in tropical acid soils amended with wood ash},
  volume       = {44},
  year         = {2000},
}

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