Jocilaine Garcia

Exigências nutricionais de sódio e cloro e estimativa do melhor balanço eletrolítico da ração para frangos de corte na fase pré-inicial (1-7 dias de idade)

Two experiments were carried out to determine the sodium (Na+) and chloride (Cl-) requirements for broilers in the pre-initial phase (1 to 7 days of age) and the best electrolyte balance of the diet. In each experiment 1500 broilers from Cobb strain were allotted to a completely randonmized design with six treatments, five replicates and 50 birds per experimental unit. The treatments used in the two experiments consisted of diets with levels on 0.10, 0.15, 0.20, 0.25, 0.30 and 0.35% of Na+ (Exper. 1) or Cl ¾ (Experiment 2), each one with different electrolyte balance values. A quadratic and broken line models to determine the nutritional requirements were used. In the Experiment 1, the estimated Na+ requirements was 0.26% for body weight gain, 0.29% feed:gain. No differences were observed for feed intake. The best electrolyte balances of diet for maximum performance was 304 and 319 mEq/kg. In the Experiment 2, the estimated Cl- requirement was .29% for body weight gain and 0.28% for feed:gain ratio. The feed intake showed a linear response. The best electrolyte balance ranged from 250 to 252 mEq/kg.

Effects of including scrapes of residual dehydrated cassava in sheep feeding on intake and nutrient digestibility

The objective of the present study was to evaluate the inclusion of 0%, 10%, 20%, and 30% of scrapes residual dehydrated cassava (SRDC) in sheep feed on the intake and total digestibility coefficient (DC) of nutrients. We used four sheep with body weight (BW) of 26.0 kg, distributed in a Latin square design. The sheep were placed in metabolism cages and received two meals a day. The variables studied were subjected to analysis of variance and differences were tested using regression analysis at the 5% significance level. We determined that the inclusion of different concentrations of SRDC in sheep feeding did not modify (p > 0.05) the intake of intake of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF), or total carbohydrates (TC) expressed in g animal-1 day-1, g kg0.75-1 and %BW). On average 2.83%, 2.58%, 0.34%, 0.07%, 1.62%, 0.91%, and 2.24% of the BW were obtained for intake of DM, OM, CP, EE, NDF, ADF, and TC, respectively. However, the four experimental diets negatively affected the NFC intake and %BW (p 0.05) the digestibility coefficient of most of the variables measured (DM, OM CP, EE, NDF, ADF, TCH, NFC, with average values of 67.79%, 67.61%, 53.87%, 81.42%, 55.61%, 39.07%, 70.95%, and 91.48%, respectively. Thus, we conclude that the inclusion of up to 30% of SRDC in sheep diets would not affect intake or nutrient digestibility