Resumo

GOMEZ-VAZQUEZ, A. et al. Production of steers fed African oil palm (Elaeis guineensis L.) fiber with the addition of organic minerals and grazing Africa star grass. Cuban J. Agric. Sci. [online]. 2017, vol.51, n.4, pp. 417-426. ISSN 2079-3480.

The effect of the addition of an organic mineral (Bioplex Quality Meat) and a complement of African oil palm fiber as supplementary forage in the gain and digestibility of fattening steers in grazing under tropical conditions was studied. A total of 40 crossbreed steers (Bos taurus x Bos indicus), with average initial live weight of 276 ± 28 kg for 120 d were used. They were fed individually with 1 kg d-1 of concentrate (14 % CP) and African oil palm fiber. A completely randomized design was applied, according to the following treatments: 1)control, only grazing (CG); 2) grazing + African oil palm fiber (AOPF-0); 3) grazing + African oil palm fiber + 15 g animal-1 d-1 of Bioplex Quality Meat (AOPF-15) and 4) grazing + African oil palm fiber + 30 g animal-1 d-1 Bioplex Quality Meat (AOPF-30). The daily weight gain of the steers was improved with Bioplex Quality Meat, with a linear effect (P <0.01); (CG =492, AOPF-0 = 554, AOPF-15 = 637, AOPF-30 = 792 g d-1 Bioplex Quality Meat). This was associated with the increase in intake (linear effect P <0.05) of African oil palm fiber (CG = 0.0, AOPF- 0 = 3.06, AOPF-15 = 3.08, AOPF-30 = 3.36 kg d-1) and higher DM digestibility (P <0.05) with respect to the control group (CG = 67.13, AOPF-0 = 74.26, AOPF-15 = 72.29, AOPF-30 = 72.46 %).There was no effect on total forage or DM intake. It is concluded that Bioplex Quality Meat increases the nutrient availability of the African oil palm fiber, which improves the daily weight gain.

Palavras-chave : organic minerals; African oil palm; steers; digestibility.

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