CONSUMO, DIGESTIBILIDADE APARENTE E GLICEMIA DE BORREGAS NULÍPARAS GESTANTES E SUBMETIDAS A DOIS MANEJOS NUTRICIONAIS

• Main Authors: Gilberto de Lima Macedo Junior, Iran Borges, Luigi Francis Lima Cavalcanti, Fernando Antônio de Sousa, Maria Izabel Carneiro Ferreira
• Format: Article
• Language: English
• Published: EDUFU 2014-07-01
• Series: Veterinary News
• Subjects: Carboidrato; fibra; glicose; ingestão; ovinos
• Online Access: http://www.seer.ufu.br/index.php/vetnot/article/view/24619/16142

The goal of this paper was to evaluate the intake and digestibility of nutrients and basal glucose of nulliparous ewe lambs in two stages of gestation and submited to two nutritional management: restricted and unrestricted. The experiment was conducted at the Veterinary School of the Federal University of Minas Gerais, in the laboratory of Animal Metabolism and Calorimetry in the months of June and July of 2006. Twenty nulliparous ewe lambs were used and they were divided into two nutritional management (restricted and unrestricted). The animals were kept in metabolism cages fitted with trough, water cooler (plastic bucket) and salt shaker. The diets were composed of Tifton 85 hay chopped, experimental concentrate (corn bran, soybean meal and limestone) and when needed was added more soybean meal to close the rations. The nutritional requirements were based on National Research Council (1985) and was respected division of gestation according to the recommendation of this committee. For animals kept in nutritional restriction were removed 15% of energy requirements in the form of total digestible nutrients (TDN) and crude protein. The two experimental periods (100 days and 130 days of gestation) had a duration of 20 days each, with 15 days for adaptation and five collections. The animals were distributed in a completely randomized design in a factorial arrangement (two nutritional management and two periods of gestation) and assessments were made in the same animal. In the case of glucose were evaluated at 100, 110, 120, 130 and 140 days of gestation for 24 hours at the following times: 0, 3, 6, 9, 12, 15, 18, 21 and 24. The first collection (time 0) was performed before the first feeding . Among the times 6 and 9 animals received a second feed of the day. The dry matter intake (DMI) in grams/day increased significantly between periods of gestation. There was no effect of nutritional management on dry matter digestibility (DMD) as a function of nutrition management. The nutritional management adopted was able to promote statistical differences on the crude protein, nitrogen and fecal nitrogen excretion. The gestational period does not alter the intake of fibrous fractions, except the consumption of cellulose, which was higher for animals to 130 days of gestation. However, it is observed that the nutritional management applied to restricted animals increased the consumption of fibrous fractions. The basal glucose of ewe lambs showed interaction between nutritional management and days of gestation. Nulliparous ewe lambs are sensitive to nutritional restriction and gestational period.