Superphosphate and rock phosphates as phosphorus sources for grass-clover pasture on a limed acid soil in Southern Brazil

• Published in: Communications in soil science and plant analysis Vol. 34; no. 17-18; pp. 2503 - 2514
• Main Authors: Gatiboni, L.C, Kaminski, J, Rheinheimer, D.S, Brunetto, G
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 01.01.2003; Taylor & Francis
• Subjects: acid soils; Agronomy. Soil science and plant productions; application rate; Biological and medical sciences; crop yield; dry matter accumulation; fertilizer application; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; grassland soils; Lime; liming; liming materials; Lolium multiflorum; Nitrogen, phosphorus, potassium fertilizations; nutrient availability; Pastures; Phosphorus fertilization; rock phosphate; Rock phosphates; Soil acidity; soil fertility; Soil management; Soil-plant relationships. Soil fertility. Fertilization. Amendments; Trifolium repens; triple superphosphate; Brazil; South America; America; Grassland; Monocotyledones; Lolium multiflorum; Rock phosphates; Phosphate fertilizer; Superphosphate; Phosphorus fertilization; Pastures; Dose activity relation; Lime; Amendment; Gramineae; Dicotyledones; Phosphate rock; Angiospermae; pH; Soil acidity; Sandy loam soil; Trifolium repens; Acid soil; Treatment efficiency; Fodder; Aluminium; Exchangeable cation; Soil management; Leguminosae; Podzols; Poison; Spermatophyta; Application method; Fodder crop; Yield component
• DOI: 10.1081/CSS-120024782
• ISSN: 0010-3624

The native pastures of Rio Grande do Sul, Southern Brazil, have low productivity because of summer and spring species growing seasons on low fertility soils. The objective of this research was to evaluate sources of phosphorus (P) and lime rates surface applied on natural pasture for exotic cold season forages species introduction. The results showed that the rock phosphates Gafsa and Arad were efficient sources of P in moderate to high soil acidity. The soil acidity attenuation by liming increased the forage production and the efficiency of the soluble superphosphate, but reduced the performance of rock phosphates. The surface liming was effective in neutralizing exchangeable aluminum only in the topsoil layers.