Uso de adsorventes nas rações de frangos de corte em diferentes fases

Abstract

Mycotoxins have caused great damages in the production of broiler chicken by reducing the weight gain and aggravating the alimentary efficiency. The utilization of 0.02% bentonite adsorbent in the diet during the first three weeks of life demonstrates significant results in the decrease of mycotoxins absorbed by the villi of the intestine; therefore, it was necessary to evaluate the performance of this substance. The experimental design was in a completely randomized block as follows: 4 treatments with 4 replicates, with 11 birds per treatment and presenting a total of 176 birds. Treatment 1, control (without adsorbent) from 1-42 days; treatment 2, with adsorbent from 1-7 days; treatment 3, with adsorbent from 7-14 days and treatment 4, with adsorbent from 14-21 days. However, at 21-42 days no more adsorbents were used in the diet, since during this period the chickens had higher growth and meat deposition in the carcass, and also because they had more resistance to mycotoxins. The data were submitted to analysis of variance (ANOVA) with (p <0.05), when the means were significant, they were submitted to the Tukey test at 5%. The use of adsorbent based on 0.02% bentonite in the feed showed no significant statistical difference. With the data obtained in the present work it is possible to observe that, with the adsorbent use in the treatments in the first three phases, the zootechnical performance and the carcass yield was not influenced by the adsorbent. The consumption of ration, in the period of 21-28 days was the greater consumption due to the low temperatures at that same period.