Abstract
The objective of this study was to evaluate the influence of creep feeding and creep grazing on the pasture characteristics and on performance and productivity of sheep. Three systems of lambs production on Tifton 85 (Cynodon spp.) pastures oversown with Italian ryegrass (Lolium multiflorum Lam) were studied: lambs with dams until slaughter without supplementation (1); lambs with dams until slaughter fed concentrate in creep feeders at 2% BW.day-1 (2); and lambs with dams until slaughter and supplemented with white clover (Trifolium repens) in creep grazing system ad libitum (3). The characteristics of the pasture did not differ (P>0.05) among the systems. Individual lamb growth was higher with creep feeding (307g/day) and creep grazing (274g/day) compared to no supplemented systems (204g/day; p<0.05). Animal productivity per area on supplemented treatments (2.4 kg BW/ha/day) was significantly greater than no supplemented one (1.8kg BW/ha/day; p<0.05). White clover showed to be a particularly good supplement for raising lambs on pastures. It may be concluded that systems of feeding lambs in creep feeding and creep grazing yielded favorable productivity mainly if there is forage deficit in spring.KEYWORDS: lambs; production systems; supplementation; Tifton-85; white clover.
Highlights
BW/ha/day) was significantly greater than no supplemented one (1.8kg BW/ha/day; p
It may be concluded that systems of feeding lambs in creep feeding and creep grazing yielded favorable productivity mainly if there is forage deficit in spring
A carga animal total (ovelha + cordeiros) não diferiu (p>0,05) entre os sistemas, apresentando média de 657 kg de PC/ha, valor próximo aos 781 kg de PC observado por RIBEIRO et al (2009b), que trabalharam com pastagens de azevém com relação folha:colmo média de 1,20
Summary
CLÁUDIO JOSÉ ARAÚJO DA SILVA1, ALDA LÚCIA GOMES MONTEIRO2, SERGIO RODRIGO FERNANDES3, CÉSAR HENRIQUE ESPÍRITO CANDAL POLI4, ODILEI ROGÉRIO PRADO3, DAMARIS FERREIRA DE SOUZA5. Objetivou-se avaliar a influência da suplementação em creep feeding e creep grazing nas características da pastagem e no desempenho e produtividade de cordeiros e ovelhas. Estudaram-se três sistemas de terminação em pastagem de Tifton-85 (Cynodon spp.) quando sobressemeada com azevém anual (Lolium multiflorum Lam.): cordeiros terminados ao pé da mãe sem suplementação (1); cordeiros terminados ao pé da mãe com suplementação concentrada a 2% do PV/dia em creep feeding (2); e cordeiros terminados ao pé da mãe com suplementação de trevo branco (Trifolium repens) ad libitum em creep grazing (3). Os desempenhos dos cordeiros em creep feeding (307g/animal/dia) e creep grazing (274g/animal/dia) foram superiores (P
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