Production and chemical composition of Texel sheep milk fed with different sources of oil

Abstract

The purpose of this study was to analyze the production and composition of Texel milk sheep, fed with different sources of oil. The experiment was conducted in the months of October and November, 2007 in the Agricultural Center of Palma / UFPEL, Capão do Leão, RS. The milk was collected from 15 Texel sheep, with different numbers of lactations and number of lambs born, and these animals had never been milked. Milking was mechanical, once every seven days, in the morning after the injection of 15 IU IM oxytocin / animal (Prolacton - Tortuga ®), totaling 8 milkings. The lambs were separated from the sheep the night before milking and returned after this. The evaluation of individual milk production was made by weighing it with digital scale. To obtain the chemical composition (protein, lactose, fat and total solids) samples of each individual animal were sent in a container bromopol to the Laboratory of Milk Quality of EMBRAPA, Clima Temperado, Pelotas. The animals Were divided into 3 treatments and supplemented with commercial feed (IRGOVINO - Irgovel ®): commercial diet added 5% rice bran oil, commercial diet added 5% canola oil and commercial diet added 2% rice oil. With average availability of 0.800 kg/day of concentrate, provided morning and afternoon. It was observed that the production of milk and lactose differs significantly between the three treatments, unlike protein, fat and solids with no differences. Since the production of milk in 24 hours showed 1.44 (l), 1.30 (l) and 1.67 (l), respectively for treatments with 5% rice oil, 2% oil rice and 5% canola oil. And for lactose, 61 g for the treatment with 5% rice oil, 58.2 g for the treatment with 2% rice oil and 75.27 g for the treatment with 5% canola oil. It was concluded that production and milk composition of sheep of the Texel was modified by source of dietary oil, and canola oil which gave greater milk production and lactose.