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O trabalho compara a recuperação do P2O5 residual através de cultivos sucessivos em um solo que recebeu doses crescentes de um termofosfato magnesiano com diferentes granulometrias e superfosfato simples granulado. Os resultados obtidos pela determinação do P extraído pelas plantas em 7 cultivos em vaso permitem concluir que o termofosfato na forma pó, apresenta efeito residual semelhante ao do superfosfato simples granulado; a granulometria mais grosseira do produto termofosfato resultou em menor recuperação do fósforo residual. This paper compares the recovery of the residual P2O5 from magnesium thermophosphate (MPT) with different granule size, and from granular ordinary superphosphate(OSP). Seven successive crops were grown in pots in a greenhouse and their phosphorus content was analysed. Results demonstrated that powder MTP has the same residual effect as OSP. Coarse MTP, however, caused lower recovery of residual phosphorus

Recuperação do fósforo residual do solo, derivado de um termofosfato magnesiano com diferentes granulometrias e do superfosfato simples granulado