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Influence of surface-applied poultry manure on topsoil and subsoil acidity and salinity: A leaching column study

Haynes, Richard J ; Judge, Angus

Journal of plant nutrition and soil science, 2008-06, Vol.171 (3), p.370-377 [Periódico revisado por pares]

Weinheim: Wiley-VCH Verlag

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  • Título:
    Influence of surface-applied poultry manure on topsoil and subsoil acidity and salinity: A leaching column study
  • Autor: Haynes, Richard J ; Judge, Angus
  • Assuntos: Agronomy. Soil science and plant productions ; Biological and medical sciences ; exchangeable Al ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production ; leaching ; monomeric Al ; Other nutrients. Amendments. Solid and liquid wastes. Sludges and slurries ; soil pH ; Soil science ; Soil-plant relationships. Soil fertility ; Soil-plant relationships. Soil fertility. Fertilization. Amendments
  • É parte de: Journal of plant nutrition and soil science, 2008-06, Vol.171 (3), p.370-377
  • Notas: http://dx.doi.org/10.1002/jpln.200700167
    istex:2D9CA5D3A30F58BB12544B1A841F13C2A8EA73F8
    ArticleID:JPLN200700167
    ARC-Institute for Soil Climate and Water
    ark:/67375/WNG-73B7ZSMM-H
  • Descrição: It has been suggested that surface applications of animal manure can ameliorate both top and subsoil acidity. For that reason, the effects of surface incorporation (0-5 cm) of a high rate of poultry manure to an acid soil on pH and exchangeable and soluble Al in the top- and subsoil were investigated in a leaching column study. During the experimental period of 108 d, columns received a total of 875 mm with leaching events occurring after 9, 37, 58, and 86 d. Incorporation of poultry manure into the surface 5 cm resulted in a large rise in pH measured in both 1M KCl and in soil solution. This liming effect was attributed primarily to the substantial CaCO₃ content of poultry manure. In the 15-45 cm layer, pHKCl was not significantly different between poultry manure and control treatments but surprisingly, soil-solution pH was substantially less in the poultry-manure treatments. Exchangeable Al was significantly less in poultry manure than in control in all soil layers although the effect was most marked in the 0-5 cm layer. However, although concentrations and activities of monomeric Al (Almono), and the proportion of total Al present as Almono, in soil solution were lower under poultry manure than in control in the 0-5 cm layer, the reverse was, in fact, the case in lower soil horizons. This was attributed to a soluble-salt effect, originating from the large cation content of poultry manure, displacing exchangeable Al³⁺ and H⁺ back into soil solution. Indeed, electrical conductivity and concentrations of Ca²⁺, Mg²⁺, K⁺, and Na⁺ in soil solution were substantially higher in the poultry-manure than in the control treatments at all soil depths. Poultry-manure applications also resulted in substantial increases in the concentrations of Ca²⁺, Mg²⁺, K⁺, Na⁺, Almono, NH$ _4^+ $, and NO$ _3^- $ in leachates, particularly at the fourth leaching. It was concluded that although surface application of poultry manure can raise soil pH in the topsoil, increases in soluble-salt concentrations in soil solution can greatly modify this effect in the subsoil.
  • Editor: Weinheim: Wiley-VCH Verlag
  • Idioma: Inglês
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