Resíduos olerícolas em dietas para coelhos de corte

Abstract

In diets for broiler rabbits alfalfa hay figure as the most cost ingredient. In this way, replace it with agricultural residues cheapens the rabbits products. In addition, the use of residues reduces liabilities in the environment and improves the sustainability of the production chain. Two experiments were conducted at the Cuniculture Laboratory of Department of Animal Science of the Federal University of Santa Maria, where he studied the influence of different substrates replacing alfalfa hay in diets for broiler rabbits. The aim of the first study was to evaluate the feasibility of using the carrot tops (CT) replacing alfalfa hay in diets for broiler rabbits. To this end, we used 30 rabbits of New Zealand kind, weaned at 35d, divided into 3 groups subjected to the following treatments: T0CT control treatment without including CT; T25CT - diet with 25% CT replacement alfalfa hay and T50CT diet with 50% CT replacement alfalfa hay. The biological assay lasted 49 days. The parameters evaluated were: weight gain, feed conversion, feed intake and economic viability of diet. It was found that the average daily weight gain of the animals was 23.93g in T0CT, 22.65g in T25CT and 22:16 in T50CT. The daily feed intake was 86.71g in T0CT, 88.43g in T25CT and 89.57g in T50CLS. The cost per kg of diet linearly reduced with the inclusion of CT to replace alfalfa hay, and the T0CT diet the most expensive (R $ 0.74 / kg) and T50CT (R $ 0.60) the most economical. It follows that the CT can replacement 50% alfalfa hay in diets for growing rabbit diet optimizing the cost without sacrificing performance of the animals. The purpose of the second study was to determine the effect of replacing alfalfa hay for sweet potato vines (SPV) on performance, carcass and liver metabolism parameters broiler rabbits. To this end, twenty-seven rabbits, New Zealand kind were weaned at 35d and divided into three treatments: 0SPV diet without the inclusion of SPV; 10SPV- diet with 10% alfalfa hay replaced by SPV; and 15SPV diet with 15% alfalfa hay replaced by SPV. The trial lasted 49 days. The daily feed intake ranged from 73.17 to 78.02g; daily weight gain, 22.32 to 23.17g; and feed conversion of 3.16 to 03.49 and the final live weight, from 1839.44 to 1880.55g. None of these performance parameters were significantly affected by dietary treatments. As for the post-slaughter data treatments did not differ in carcass weight and heart. However, the liver weight was significantly lower in animals 10SPV treatment. The glucose present in the liver ranged from 1.62mg/g-1 in 10SLP group to 5.02mg/g-1 in 15SPV and 5.6 mg/g-1 in the control group (0SPV). The glucose released into the tissue showed concentration 2,35μmol, 2,13μmol and 2,59μmol released / g tissue in the treatment 0SPV, 10SPV and 15SPV respectively. Therefore concluded that the SPV can be included in up to 15%, replacing alfalfa hay without adversely affecting the performance of the animals.