CAJ | 학술논문

为探讨日粮中添加γ-氨基丁酸对猪的促生长效果及其与生长、摄食及代谢相关激素之间的联系.试验选用(34.07±0.01)kg的杜长大三元杂交猪60头,随机分到3个处理中,每个处理4个重复,每个重复5头猪.试验采用单因子设计,按日粮添加水平设基础日粮组(0 mg/kg γ-氨基丁酸)、基础日粮+50 mg/kg γ-氨基丁酸和基础日粮+100 mg/kg γ-氨基丁酸3个处理,试验期28 d.结果表明,γ-氨基丁酸对猪的促生长作用明显,但随生长阶段和作用剂量不同存在一定差异,主要体现在试验3～4周,以100 mg/kg的效果较为突出.100 mg/kg组试验猪第3周(P＜0.1)、第4周(P＜0.05)及0～4周(P＜0.1)的ADG和第4周(P＜0.01)、3～4周(P＜0.1)的ADFI以及0～4周(P＜0.05)的F/G都明显超过对照组.日粮中添加γ-氨基丁酸显著促进了试验猪体内生长激素(P＜0.05)和褪黑素(P＜0.05)的分泌,明显提高了小猪体内促甲状腺激素水平(P＜0.1),这也与良好的生产性能吻合,但作用程度随试验阶段和激素种类不同而存在一定差别.总的看来,日粮中添加γ-氨基丁酸能够有效改善小猪生产性能,促进生长,但为获得理想结果必须考虑添加剂量与使用时间.
위탐토일량중첨가γ-안기정산대저적촉생장효과급기여생장、섭식급대사상관격소지간적련계.시험선용(34.07±0.01)kg적두장대삼원잡교저60두,수궤분도3개처리중,매개처리4개중복,매개중복5두저.시험채용단인자설계,안일량첨가수평설기출일량조(0 mg/kg γ-안기정산)、기출일량+50 mg/kg γ-안기정산화기출일량+100 mg/kg γ-안기정산3개처리,시험기28 d.결과표명,γ-안기정산대저적촉생장작용명현,단수생장계단화작용제량불동존재일정차이,주요체현재시험3～4주,이100 mg/kg적효과교위돌출.100 mg/kg조시험저제3주(P＜0.1)、제4주(P＜0.05)급0～4주(P＜0.1)적ADG화제4주(P＜0.01)、3～4주(P＜0.1)적ADFI이급0～4주(P＜0.05)적F/G도명현초과대조조.일량중첨가γ-안기정산현저촉진료시험저체내생장격소(P＜0.05)화퇴흑소(P＜0.05)적분비,명현제고료소저체내촉갑상선격소수평(P＜0.1),저야여량호적생산성능문합,단작용정도수시험계단화격소충류불동이존재일정차별.총적간래,일량중첨가γ-안기정산능구유효개선소저생산성능,촉진생장,단위획득이상결과필수고필첨가제량여사용시간.
A study was conducted to determine the effects of feeding γ-aminobutyric acid (GABA) on the growth performance and its relation with the related hormones of growth, food intake and metabolism in pigs. Sixty Duroc × (Landrace × Large Yorkshire) growing pigs with an average initial body weight (BW) of (34.07 ± 0.01) kg, were randomly allotted to three treatment groups with 4 replications of 5 pigs per replicate pen for each treatment in 28 days trial. The treatments were designed in a single factorial arrangement, and were as follows: (1) basal diet without GABA, (2) basal diet with 50 mg/kg GABA, and (3) basal diet with 100 mg/kg GABA. The results showed that γ-aminobutyric acid with 100 mg/kg has a significant effect on growth performance (P＜0.1). However, the effect varied from the growth stages and the dosage of γ-aminobutyric acid added in the diets. In this trial, diet with 100 mg/kg GABA had significantly improved the performance during the growing period from Week 3 to Week 4 compared with the control. The results indicated that pigs grew faster in Week 3 (P＜0.1) , Week 4(P＜0.05) and Week 0 to Week 4 (P＜0.1) . The results also indicated that pigs in treat 1 and treat 2 ate more than those pigs fed on basal diets in Week 4(P＜0.01) as well as from Week 3 to Week 4(P＜0.1) when they were provided 100 mg/kg GABA. Therefore, the F/G in 100 mg/kg GABA was improved more than the control during the whole trial(P＜0.05) . In addition, GABA obviously promoted the secretion of growth hormone (P＜0.05),melatonin (P＜0.05) and thyroid stimulating hormone (P＜0.1) of experimental pigs. However, there were some differences on the effect of GABA according to different experimental stages as well as types of hormone. In summary, GABA can effectively improve the performance when they fed pigs. However, it was noted that the level and using time must be taken into consideration in order to obtain a better effect.