Effects of γ-aminobutyric Acid on Growth Performance and Meat Quality of Finishing Pigs under the Hot and Humid Conditions
The experiment was conducted to study the effects of different doses of γ-aminobutyric acid (GABA) on growth performance and meat quality in finishing pigs under hot and humid conditions, in order to put forward the appropriate dosage of γ-aminobutyric acid.Sixty healthy DLY crossbred pigs with an initial body weight about 58 kg were randomly divided into 6 groups with 1～5, 10 replicates for each group, each repeat of one pig.Basal diet was the same in each group and 0, 10, 20, 30, 40, 50 mg/kg GABA was added respectively.The experiment lasted from about 58 kg to 120 kg.Results show that fattening early stage, addition of GABA had no improvement;fattening later stage, GABA increased the daily feed intake and daily gain in different degrees, but there was no significant difference in feed efficiency (P＞0.05).The whole fattening period, ADFI and ADG in groups of GABA were higher than those of the control group but on significant difference;Feed efficiency of each group was close and F/G of the treatment 3 was the lowest.HSP70 of treatment 1～5 were lower than that of the control group (P＞0.05).The eye muscle area, slaughter rate, lean meat rate and the bone rate had no significant difference (P＞0.05) in each group.GABA influence pig fat deposition, its mechanism needs further research.10 ～ 40 mg/kg GABA added had no negative effect on meat quality.The above results show that adding appropriate dosage of GABA to the diets of finishing pigs could improve feed intake and daily weight gain, improve the growth performance and had no negative effect on meat quality under the hot and humid conditions and can be used to relieve heat stress in summer, and appropriate dosage of GABA was 30 mg/kg.
国家科技期刊平台
NSTL
万方数据
维普
