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Waste products as alternative phosphorus fertilisers part II: predicting P fertilisation effects by chemical extraction

Brod, Eva ; Øgaard, Anne Falk ; Haraldsen, Trond Knapp ; Krogstad, Tore

Nutrient cycling in agroecosystems, 2015-11, Vol.103 (2), p.187-199 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Waste products as alternative phosphorus fertilisers part II: predicting P fertilisation effects by chemical extraction
Autor: Brod, Eva ; Øgaard, Anne Falk ; Haraldsen, Trond Knapp ; Krogstad, Tore
Assuntos: Agriculture ; Agronomy ; Ammonium ; Ashes ; Bioassays ; Biomedical and Life Sciences ; Calcium ; Calcium chloride ; Calcium phosphates ; Catering ; Chemical extraction ; Citric acid ; Fertilization ; Fertilizers ; Filter paper ; Food production ; Food waste ; Iron ; Laboratory methods ; Life Sciences ; Meat ; Nutrient deficiency ; Organic chemistry ; Original Article ; Peat ; pH effects ; Phosphorus ; Sludge ; Sodium bicarbonate ; Soil chemistry ; Soil mixtures ; Soil pH ; Soils
É parte de: Nutrient cycling in agroecosystems, 2015-11, Vol.103 (2), p.187-199
Descrição: Knowledge of the relative agronomic P efficiency (RAE) of waste products compared with mineral fertiliser is essential for establishing reliable fertilisation plans. This creates the demand for an evaluation of laboratory methods that can predict RAE of waste products. In this study we compared eight chemical extraction methods in terms of their ability to predict readily-available P and late-season P fertilisation effects of a wide range of waste products (two biomass ashes, meat bone meal, fish sludge, catering waste, two food waste-based digestate products) at two soil pH levels, approximately pH 5.5 (pH level 1) and pH 6.9 (pH level 2). Extractable P was correlated with RAE determined in a bioassay with ryegrass ( Lolium multiflorum ) and a nutrient-deficient sand-peat mixture as model soil. At pH level 1, P extraction with 0.005 M CaCl 2 and simultaneous adsorption to iron-oxide impregnated filter paper predicted RAE best at harvest 1 and neutral ammonium citrate predicted RAE best as the sum of harvests 2, 3 and 4. At pH level 2, 0.5 M NaHCO 3 (pH 8.5, Olsen P) was the only extraction method that was significantly correlated with RAE at harvest 1 and the sum of harvests 2, 3 and 4, because all other extractions overestimated RAE of waste products containing stable calcium phosphates. The optimum extraction method thus depends on whether readily-available P or late-season P fertilisation effects are being predicted and on the pH of the target soil.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Waste products as alternative phosphorus fertilisers part II: predicting P fertilisation effects by chemical extraction

Brod, Eva ; Øgaard, Anne Falk ; Haraldsen, Trond Knapp ; Krogstad, Tore

Dordrecht: Springer Netherlands

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