Details

Autor(en) / Beteiligte

• Mumbach, Gilmar Luiz
• Gatiboni, Luciano Colpo
• Dall’Orsoletta, Daniel João
• Schmitt, Djalma Eugênio
• Pessotto, Patrícia Pretto
• de Oliveira, Clovisson Menotti Boeira

Titel

Phosphorus Extraction with Soil Test Methods Affected by Soil P Sorption Capacity

Ist Teil von

• Journal of soil science and plant nutrition, 2020-12, Vol.20 (4), p.1882-1890

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2020

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• The aim of this study was to evaluate the phosphorus (P) extraction ability of the methods Mehlich 1 (M-1), Mehlich 3 (M-3), anion exchange resin in strips (AER-ST), and anion exchange resin in spheres (AER-SP), as a function of clay content, P rates, and incubation time. Experimental units were built with 20%, 40%, 60%, and 80% of clay and five different phosphorus rates as follows: 0, 100, 200, 400, and 600 mg P kg −1 , with subsequent incubation for 0, 30, and 90 days. After that, the samples were subjected to the analysis of extractable P using the M-1, M-3, AER-ST, and AER-SP extractors. All P extraction methods evaluated were sensitive to clay content and to the amount of added P. The input of P increased the recovery of this nutrient by all extractors, but this was less effective when the clay content of the soil was increased. In general, the ability of phosphorus extraction from the soil followed the order: M-1 > AER-SP > M-3 > AER-ST. The longer contact time of P with the soil, lower is the extracted P content, regardless of the extraction method, this being more evident in clayey soils. All extraction methods tested are sensitive to clay content, incubation time, and to the P concentration applied.