Andropogon grass consortium with stylo in two times: the forage response and sources of phosphorus rates
Data
2014-10
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Resumo
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.
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Stylosantes guianensis, Phosphorus solubilization, Natural phosphate, Pastures, Stylosantes guianensis, Pastagens, Fosfato natural, Solubilização de fósforo
Citação
FLORES, Rilner Alves; COLLIER, Leonardo Santos; SANTOS, Carlos Leandro Rodrigues dos; BORGES, Bernardo Melo Montes Nogueira; MODA, Leandro Rosatto; SILVA, Átila Reis da. Andropogon grass consortium with styloin two times: the forage response and sources of phosphorus rates. Bioscience Journal, Uberlândia, v. 30, suppl. 2, p. 824-832, Oct. 2014.