Suplementação gestacional e aspectos produtivos de ovinos da raça Ideal

Abstract

The present study discusses the effect of supplementation during gestation on the productive capacity of the sheep and its lamb. The work was carried out in a private property located in the municipality of Capão do Cipó - RS (28º93'45 "S and 54º57'80" W), 53 adult sheep (3 and 4 years old) of the Ideal breed, medium 3 (1 to 5 scale), inseminated by laparoscopy technique using fresh sperm from a single reproducer; and his lambs. The animals were divided into five experimental treatments according to the period of supplementation (1.5% of live weight), namely: SS- without supplementation; SIG- supplementation of the beginning of gestation up to 50 days; SMG- supplementation from 51 to 100 days of gestation; SFG- supplementation from 101 to 150 days - late gestation and SG- supplementation throughout pregnancy. The highest preterm weight (52.27 kg) associated with 100% lamb survival was observed in SG, which together with SFG presented the highest ECC (3.95 and 3.65 respectively). In the metabolites only BHB presented differences between the treatments being smaller in SG and SFG sheep (47 and 31 mmol / L respectively), sheep that received supplementation throughout pregnancy had greater diameter of fiber and body weight, lambs wool performance was not influenced by the feeding of sheep during gestation. Due to the low rates of sheep production in Brazil and in our state, alternatives should be proposed to raise these rates. Supplementation throughout pregnancy increased lambs' survival rate and preweaning lamb weight and increased the wool fiber diameter of the sheep. However, supplementation during gestational periods did not influence the fineness and fleece weight of the progeny.