| Summary: | 碩士 === 國立屏東科技大學 === 畜產系所 === 98 === The factors in the growth performance of piglets include environmental temperatures, feeding and management, genetics, endocrine and nutrition. Pig farmers’ aim is to maintain the growth performance of piglets and to shorten the period of feeding, and in turn to maximize their profits. Chicken essence byproduct from meat processing factories contains the nutrition similar to bone powder and could be a source of animal protein, calcium and iodine. Nonetheless, its amino acid composition is not good. The purpose of this experiment is to explore the influences of adding different proportions of extruded chicken essence byproduct, corn（extruded and unextruded）, soybean meal（extruded and unextruded）and tryptophan on the growth performance of pigs. By studying nursery pigs and growing pigs, this research has found the better usage and proportion of feeds, which could maintain a better growth efficiency and lower the cost of feeds, creating better profits for pig farmers. This experiment is composed by three trials, all conducted on three crossbred (LYD) weaning pigs, including 28-day-old piglets and 42-kg growing pigs. During each of the three trials, twenty-four hour lighting and ad libitum feeding and drinking were provided. Heating lamps was applied in the whole period and temperature changed according to the environmental temperature. The initial weights, daily feed intake, weekly weight increase, weekly feed efficiency are recorded.
In trial 1, 48 nursery pigs were randomly allocated into 3 dietary treatments, 4 replications in each treatment, 4 piglets in each replication. The dietary formulations were: treatment 1: extruded chicken essence byproduct + soybean meal; treatment 2: extruded chicken essence byproduct + DDGS; treatment 3: ground corn + soybean meal. The duration of trial was 8 weeks. The results show that, in the groups fed with addition of extruded chicken essence byproduct, the feed intake, weight increase and feed efficiency of pigs is not as good as the control group. Meanwhile, among the groups fed with addition of extruded chicken essence byproduct, worse growth performance tendency was observed in the group fed with DDGS.
In trial 2, 36 growing pigs were randomly allocated into 3 dietary treatments, 3 replications in each treatment, 4 piglets in each replication. The dietary formulations were: treatment 1: extruded chicken essence byproduct + soybean meal; treatment 2: extruded chicken essence byproduct + DDGS; treatment 3: ground corn + soybean meal. The duration of trial was 8 weeks. The results show that in the whole period, no significant difference on feed intake and weight increase was observed among all groups. As for feed efficiency, the group with addition of extruded chicken essence byproduct + soybean meal is significantly worse than the group with addition of ground corn + soybean meal.
In trial 3, 48 nursery pigs were randomly allocated into 3 dietary treatments, 4 replications in each treatment, 4 piglets in each replication. The dietary formulations were: treatment 1: ground corn + soybean meal; treatment 2: ground corn + soybean meal + tryptophan; treatment 3: chicken essence byproduct + soybean meal + tryptophan;. The duration of trial was 6 weeks. The results show that in the whole period, no significant difference on feed intake was observed among all groups. As for weight increase and feed efficiency, the group with chicken essence byproduct and corn is significantly worse than others.
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