EFICIÊNCIA DE FERTILIZANTES ORGANOMINERAIS FOSFATADOS NA PRODUÇÃO DE MASSA SECA E ACÚMULO DE FÓSFORO, MANGANÊS, ZINCO E COBRE EM PLANTAS DE MILHO

Abstract

: The objective of this work was to evaluate the efficiency of three organic mineral fertilizers compared to mono ammonium phosphate (MAP), in relation to the production of dry mass and accumulation of P, Cu, Mn and Zn in the shoots. The study was conducted in a greenhouse, with temperature and relative humidity controlled. We used a sample from 0 to 20 cm deepth of a soil classified as Planossolo, colected in the city of Seropédica-RJ. A soil sample was incubated with limestone until pH compound (FOM-CS) and bovine bone meal (FOM-FO)), four increasing doses of P (50, 100, 200 and 300 mg P dm -3 ) and one additional treatment without P, totaling 17 treatments and 51 experimental units. FOM-FO presented higher efficiency in dry mass production when compared to MAP. Fertilizers that did not differ from each other and no phosphorus factor of the aerial part of maize plants, or FOM-CH provided higher Zn moisture volumes when used in MAP and FOM-CS.