Desempenho produtivo e exigências de minerais para caprinos Canindé em crescimento.

Abstract

The objective of this study was to evaluate the ingestive behavior, performance and requirements macromineral for weight gain Caninde goats in confinement. Therefore, was developed two experimental trials in a randomized design. In the first, we used 24 goats Caninde with initial age of five months, initial body weight of 15.84 ± 0.39 kg and 2.17 ± 0.17 ECC, submitted to three feeding levels: ad libitum, 20% and 40% restriction, to assess the variables of feeding behavior and performance. In the second, we used 33 goats Canindé initial body weight of 15.65 ± 0.41 kg, five of which were slaughtered at the beginning of the experiment to determine initial body composition and 28 goats were submitted to four feeding levels: ad libitum, 20%, 40% and 60% restriction in seven groups of four animals. The Behavioral observations were performed at five-minute intervals by 24 hours. For the determination of digestibility, the animals were kept in cages of metabolism trial, and the net requirements for gain (g / kg BW gain) were estimated by comparative slaughter. Goats Caninde submitted to food restriction spend daily, less time rumination and feeding, and increased idleness. The feed restriction did not affect rumination efficiency (kg DM / h), however, 40% restriction improve feed efficiency (NDF kg / h). Digestibility was not influenced by the levels of food restriction, except for ether extract. The levels of dietary restriction influenced the average daily weight gain. The body composition of goats Caninde weighing 15 to 25 kg, ranged from 10.49 to 12.59 g Ca, 8.08 to 7.16 g P, 0.18 to 0.44 g Mg, 1, 37 to 1.63 g of K and 1.59 to 4.09 g of Na g / kg EBW. The net requirements to gain varied from 10.91 to 13.83 g Ca, 5.00 to 4.67 g of P, from 0.36 to 0.93 g of Mg 1.4 to 1.75 g of K and from 3.34 to 9.06 g of Na g / kg of body weight gain.