Effect of sources of phosphorus on “in vitro” digestibility of dry matter, organic matter and total digestible nutrients of Mombaça grass (Panicum maximum Jacq. Cv. Mombaça)

Fábio Jacobs Dias, Clóves Cabreira Jobim, Antonio Ferriani Branco, Carlos Antonio Lopes de Oliveira

Abstract


The trial was performed to evaluate the effect of phosphorus sources on forage mass quality of Mombaça grass (Panicum maximum Jacq. cv. Mombaça), according to in vitro dry matter and organic matter digestibility and TDN concentration. Every month, samples of available forage mass were taken, from December, 2002 until April, 2003. The treatments were three phosphate sources (1-YoorinÆÊ magnesium thermophosphate; 2-GafsaÆÊ natural phosphate; 3-simple superphosphate + triple superphosphate) and the control (no fertilizer). They were arranged in a randomised block design with three replications. It was used 12 plots sized from 0,7 to 1,0 hectare, which were delimited by two-line eletric fence. The grazing method was continuous stocking and variable stocking rate (“put-and-take”). The IVDMD, IVOMD and TDN coefficients decreased along sampling period. IVDMD, IVOMD and TDN concentration didn’t show significantly differences among treatments (P>0.05).


Keywords


Fertilizers; Forage; Grazing; Pasture.



DOI: http://dx.doi.org/10.5433/1679-0359.2008v29n1p211

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional