CAJ | 학술논문

本试验旨在研究日粮中添加不同水平γ-嗡基丁酸(GABA)对哺乳母猪生产性能、激素水平的影响及其量效关系.选取经产大白母猪40头,采用单因子试验设计,按GABA添加水平(0、25、50、100、150 mg/kg)设对照组和试验组共5个处理,每个处理8个重复,每个重复1头猪,试验期21 d.结果表明,GABA在促进母猪摄食方面效果明显,对减少体重损失、缩短断奶-发情间隔及促进仔猪生长也有一定效果.其作用程度与日粮添加剂量和哺乳阶段均密切相关,低添加水平范围作用更为明显,且随着试验时间的延长,作用呈增强趋势.就促采食作用而言,50 mg/kg GABA的效果要优于其他水平,该组母猪不仅在分娩后第1周(P<0.01)、第2周(P<0.10)和第3周(P<0.10),而且在整个试验期(P<0.01)都明显高于对照组.从相关激素看,与对照组相比,50 mg/kg GABA组母猪分娩后第1周血清瘦素含量显著降低(P<0.05),第2周、第3周血清神经肽Y(NPY)含量显著升高(P<0.01、P<0.05).50 mg/kg GABA组在分娩时(P<0.10)与分娩后第2周(P<0.05)血清生长激素(GH)含量也明显高于对照组.由此可见,日粮中添加GABA对改善哺乳母猪生产性能具有一定作用,摄食调节作用主要通过影响血液中NPY和瘦素含量实现,效果与添加水平和哺乳阶段密切相关,以50 mg/kg GABA作用为佳.
본시험지재연구일량중첨가불동수평γ-옹기정산(GABA)대포유모저생산성능、격소수평적영향급기량효관계.선취경산대백모저40두,채용단인자시험설계,안GABA첨가수평(0、25、50、100、150 mg/kg)설대조조화시험조공5개처리,매개처리8개중복,매개중복1두저,시험기21 d.결과표명,GABA재촉진모저섭식방면효과명현,대감소체중손실、축단단내-발정간격급촉진자저생장야유일정효과.기작용정도여일량첨가제량화포유계단균밀절상관,저첨가수평범위작용경위명현,차수착시험시간적연장,작용정증강추세.취촉채식작용이언,50 mg/kg GABA적효과요우우기타수평,해조모저불부재분면후제1주(P<0.01)、제2주(P<0.10)화제3주(P<0.10),이차재정개시험기(P<0.01)도명현고우대조조.종상관격소간,여대조조상비,50 mg/kg GABA조모저분면후제1주혈청수소함량현저강저(P<0.05),제2주、제3주혈청신경태Y(NPY)함량현저승고(P<0.01、P<0.05).50 mg/kg GABA조재분면시(P<0.10)여분면후제2주(P<0.05)혈청생장격소(GH)함량야명현고우대조조.유차가견,일량중첨가GABA대개선포유모저생산성능구유일정작용,섭식조절작용주요통과영향혈액중NPY화수소함량실현,효과여첨가수평화포유계단밀절상관,이50 mg/kg GABA작용위가.
This study was conducted to investigate the effects of different levels of γ-amino butyric acid (GABA) from 0 to 150 mg/kg on the performance and serum hormone levels in Yorkshire lactating sows.Forty sows were randomly allocated to five treatments with eight replicates in each and one sow in each replicate according to single factor design.The trial las-ted for 21 days.The results showed that 1) the GABA had a positive effect on improving feed intake, weight loss, estrus in-terval and performance of piglets to some extent.The effect of GABA was mainly influenced by the level of GABA added in diet and nursery phase.It was noted that the effect of GABA in lower levels was better than that of high levels and became even better with the nursery phase prolonged.As to feed intake, the effect of 50 mg/kg GABA was better than that of the control in week 1 (P<0.01), week 2 (P<0.10), week 3 (P<0.10) and the whole experimental period (P<0.01); 2) comparing with the control group, the level of leptin in serum in 50 mg/kg GABA group significantly decreased (P<0.05), and the level of NPY obviously increased in week 2 and week 3 (P<0.01, P<0.05).In addition, the level of GH in 50 mg/kg GABA group in delivery (P<0.10) and week 2 (P<0.05) were obviously higher than that of the control group.In conclusion, GABA improved the performance and feed intake by regulating the levels of NPY and leptin in serum of sows, and the effect was mainly related to the addition level and nursery phase.The suitable GABA level was 50 mg/kg.