Author(s):
Flores, Rilner Alves ; Collier, Leonardo Santos ; Rodrigues dos Santos, Carlos Leandro ; Montes Nogueira Borges, Bernardo Melo [UNESP] ; Moda, Leandro Rosatto [UNESP] ; Silva, Atila Reis da
Date: 2018
Persistent ID: http://hdl.handle.net/11449/181691
Origin: Oasisbr
Subject(s): Stylosantes guianensis; Fosfato natural; Solubilização de fósforo; Pastagens; Stylosantes guianensis; Natural phosphate; Phosphorus solubilization; Pastures; Stylosantes guianensis; Stylosantes guianensis; Fosfato natural; Fosfato natural; Solubilização de fósforo; Solubilização de fósforo; Pastagens; Pastagens; Stylosantes guianensis; Stylosantes guianensis; Natural phosphate; Natural phosphate; Phosphorus solubilization; Phosphorus solubilization; Pastures; Pastures
Description
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The use of legumes intercropped with forage in the Brazilian savannah (Cerrado) region is an alternative to reverse the process of pasture degradation. The natural phosphorus deficiency in this region and the high retention capacity of this nutrient in the soil are factors that directly affect the sustainability of the production system. The objective of this study was to evaluate the effect of a phosphate with medium solubility (Arad) compared to more soluble sources such as triple superphosphate and mono-ammonium phosphate, on the formation and maintenance of pastures of Andropogon gayanus with or without the introduction of Stylosantes guianensis in pasture already established in the Brazilian savannah. Two experiments were carried out under field conditions in an Oxisol using a randomized block design with split plots, plots with two sources of phosphorus (Arad and super-triple or MAP) and subplots with different levels of phosphorus. The study showed that andropogon grass, even though characterised as forage requiring low fertilization, responded to increased fertilization, especially with the use of more soluble sources of P at planting. From the second year on, with the introduction of Stylosantes guianensis, verified effects were seen on legumes in their efficiency of utilization of residual fertilization from the first year; however, this didn’t affect legume dry matter production resulting from the P sources used for the andropogon grass. The mixed stands of andropogon grass and Stylosantes guianensis made it more advantageous to increase the P sources using phosphate fertilizer with lower solubility (Arad), when compared to MAP.
Univ Fed Goias, Soils Sect Sch Agron, Goiania, Go, Brazil
UFMT, Inst Exact Sci &Earth, Barra Do Garcas, MT, Brazil
UNESP, Dept Soils &Fertilizers, FCAV, Jaboticabal, SP, Brazil
Univ Fed Goias, Goiania, Go, Brazil
Univ Rostock, D-18055 Rostock, Germany
UNESP, Dept Soils &Fertilizers, FCAV, Jaboticabal, SP, Brazil
