ABSTRACT
Mineral phosphorus fertilizer can be replaced by organic-mineral fertilzer to garantie the soil fertility. This paper evaluated the effects of mineral and organic-mineral phosphorus on the soil fertility with maize tillage. The experiment was installed in a seedlings nursery at Universidade do Oeste Paulista in Presidente Prudente-SP, in a completely randomized desing, with 9 treatments and 4 replicates. As phosphorus fertilizer source was used the organic-mineral Biofós (3.8% P2O5) and simple superphosphate (18% P2O5). The levels of phosphorus, organic matter, calcium, magnesium, base saturation and soil pH was evalutate in soil samples 50 days after maize emergence. The organic-mineral showed the same efficiency of simple superphosphate in soil fertility. Both simple superphosphate and organic-mineral promoted changes in pH and organic matter levels. The phosphorus, calcium, magnesium and base saturation level not differed in all fertilizer sources and doses used.
ABSTRACT
Mineral phosphorus fertilizer can be replaced by organic-mineral fertilzer to garantie the soil fertility. This paper evaluated the effects of mineral and organic-mineral phosphorus on the soil fertility with maize tillage. The experiment was installed in a seedlings nursery at Universidade do Oeste Paulista in Presidente Prudente-SP, in a completely randomized desing, with 9 treatments and 4 replicates. As phosphorus fertilizer source was used the organic-mineral Biofós (3.8% P2O5) and simple superphosphate (18% P2O5). The levels of phosphorus, organic matter, calcium, magnesium, base saturation and soil pH was evalutate in soil samples 50 days after maize emergence. The organic-mineral showed the same efficiency of simple superphosphate in soil fertility. Both simple superphosphate and organic-mineral promoted changes in pH and organic matter levels. The phosphorus, calcium, magnesium and base saturation level not differed in all fertilizer sources and doses used.