Abstract

PANTIU, A.J.; CAPELLARI, A.  and  GIMENEZ, L.I.. Relación entre pastura (Axonopus catarinensi), lapso de suplementación y crecimiento de vaquillonas en sistema silvopastoril. Rev. vet. [online]. 2015, vol.26, n.1, pp.22-26. ISSN 1669-6840.

The aim of this study was to determine the relationship among growth of heifers, lapse of supplementation, and availability of a pasture (Axonopus caterinensis) on a silvopastoral system. Experimental design was randomly carried out with two treatments (T1, T2) and four repetitions. In T1 animals received feeding supplementation during the nine months that the test took place and in T2 they received the same supplementation as in T1 for four months during winter but were fed only with pasture for the rest of the period. Supplementation consisted of 56% maize and 44% cotton expeller to 0.83% of liveweight, with Axonopus catarinensis available at will. Every 28 to 32 days animals were measured for liveweight, total and daily weight gain, height at withers and at rumps, body length, and thoracic circumference. Pasture sampling was performed by means of the disk method and quality was measured in the consumed pasture portion. A correlation with Pearson method was conducted, with no significant differences between the treatments. Weight was significantly correlated with the thoracic circumference (r=0.95; p<0.001), (r=0.79; p<0.001), (r=0.79; p<0.001). Raw protein (r=-0.46; p<0.0001) and availability (r=0.76; p<0.0001) were significantly correlated with weight, as well as availability and height at withers (r=0.76; p<0.001), height at rumps (r=0.74; p<0.001) and thoracic circumference (r=0.81; p<0.001). It is concluded that the amount of available forage is a determinant for animals´ response, since a larger quantity of dry matter means greater body weight

Keywords : heifer; growth; pasture quality; availability; silvopastoral system.

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