competição de fertilizantes fosfatados para o trigo influence of phosphate sources on wheat production
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1962
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Abstract
Um experimento de adubação para cultura de trigo, estudando diversos adubos fosfatados, é aqui relatado. Foram empregadas doses crescentes de 90 e 180 kg/ha de P2O5, em presença e em ausência de calcário. Os fosfatos utilizados, sempre acompanhados de nitrogênio e potássio, foram; superfosfato simples, superfosfato triplo, fosforita de Olinda, fosfato Alvorada (apatita do Morro do Serrote) e apatita de Araxá. O ensaio foi conduzido no município de Avaré, Estado de São Paulo, em solo do arenito de Botucatu. Os resultados mostraram reação significativa para o fósforo, sòmente quando se usaram os superfosfatos simples e triplo, especialmente para êste último. Por sua vez, parcelas sem calcário não diferiram significativamente, na produção, daquelas que receberam calagem.
Results from field experiment are presented in this paper concerning phosphorus fertilization on wheat. Two rates of phosphorus, 90 and 180 kg/ha of P2O5, were compared in presence and absence of lime. Triple superphosphate, ordinary superphosphate and three Brazilian rock phosphates, i.e. fosforita de Olinda, fosfato Alvorada and fosfato Araxá, were utilized as phosphorus sources, with general application of nitrogen and potassium. The experiment was located on a soil classified as Arenito de Bo-tucatu, at Avaré, São Paulo State. The favorable effect of both types of superphosphate in increasing the yeld was highly significant, while the use of three rock phosphates phomoted no significant increase on wheat production, as compared to the checks, without phosphorus. Use of lime had no effect on grain production.
Results from field experiment are presented in this paper concerning phosphorus fertilization on wheat. Two rates of phosphorus, 90 and 180 kg/ha of P2O5, were compared in presence and absence of lime. Triple superphosphate, ordinary superphosphate and three Brazilian rock phosphates, i.e. fosforita de Olinda, fosfato Alvorada and fosfato Araxá, were utilized as phosphorus sources, with general application of nitrogen and potassium. The experiment was located on a soil classified as Arenito de Bo-tucatu, at Avaré, São Paulo State. The favorable effect of both types of superphosphate in increasing the yeld was highly significant, while the use of three rock phosphates phomoted no significant increase on wheat production, as compared to the checks, without phosphorus. Use of lime had no effect on grain production.
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blanco1962bragantiacompetio
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| Authors | ;H. Garcia Blanco;Kozen Igue;Hermano Gargantini;A. C. Pimentel Wutke |
| Journal | revista espanola de salud publica |
| Year | 1962 |
| DOI |
10.1590/S0006-87051962000100051
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