Over-liming in the Construction of the Fertility of Red Yellow Latosol with Different Phosphorus Sources
Jessiane da Silva Carvalho
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Bruno Henrique Di Napoli Nunes *
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
João Henrique Silva da Luz
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Evandro Alves Ribeiro
Plant Production Graduate Program, Universidade Federal do Tocantins – Campus Gurupi, 77402-970 Gurupi, Tocantins, Brazil.
Hanrara Pires de Oliveira
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Gilson Araujo de Freitas
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Lara Couto Marques
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Gilson do Carmo Alexandrino
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
Rubens Ribeiro da Silva
Soil Laboratory, Federal University of Tocantins, Farm 69-72 Street Whiting, Lot 7 s / n – Garden Seville, Gurupi, 77404-970, Tocantins, Brazil.
*Author to whom correspondence should be addressed.
Abstract
The availability of P in Cerrado soils is a limiting factor for the satisfactory development of crops. It is known that the efficiency of phosphate fertilization is low and depends on several factors, such as solubility of fertilizers, soil texture, and soil acidity. Thus, the objective of this work was to evaluate the availability of phosphorus as a function of different phosphate sources under the influence of pH, as well as to determine its fertilization efficiency in a red latosol. The experiment was carried out in a greenhouse at Tocantins federal university, in DIC, Brazil was used, in a 3 x 5 + 1 scheme. A red-yellow Latosol was used and three sources of phosphate fertilization were evaluated: Mono-ammonic phosphate - MAP, single superphosphate - SS and Natural phosphate - FN, plus one treatment without fertilization, in five evaluation periods (0, 7, 14, 21 and 28 days). Therefore, the pH in CaCl2 of the soil stabilized between (5.5 – 6.5) in approximately 83 days of incubation with the acidity concealer. The SS and MAP phosphate fertilizers promoted the highest available P contents, with 6.32 and 6.23 mg.d m−3, respectively. The use of FN showed low P levels during the evaluated incubation period, mainly due to its lower solubility.
Keywords: Adsorption, fertilization efficiency, soil incubation.