This experiment aimed to investigate the effects of supplemented with soy protein concentrate(SPC)and Arginine+Lysine(Arg+Lys)on the growth and growth axis hormone levels of suckling lambs.Twenty four 7-days-old twin Hu lambs with similar weight of(6.02±0.45)kg were randomly divided into 3 groups,control group,SPC group and A A group,with 8 sheep(4 males and 4 females)in each group.The control group was supplemented with saline,the SPC group was supplemented with 250 mg/kg BW SPC,and the AA group was supplemented with 50 mg/kg BW Arg+50 mg/kg BW Lys.The trial lasted for 28 days.The results showed as follows:(1)Compared with the control group,the SPC group increased by 10.62％and 23.25％(P＞0.05)at the 35 days of age body weight and 7～35 days of age average daily gain,while the AA group significantly increased by 21.06％and 47.16％(P＜0.05)at the 35 days of age body weight and 7～35 days of age average daily gain.(2)Compared with the control group,the glutamine concentration in plasma of the SPC and AA groups significantly decreased by 17.65％and 20.19％,respectively(P＜0.05);The urea nitrogen concentration of AA group significantly increased by 46.48％(P＜0.05)at 0 hours before supplementation;while urea nitrogen concentration of SPC group and AA group significantly increased by 24.46％and 22.86％(P＜0.05)at 1.5 hours after supplementation.(3)Compared with the control group,the somatostatin(SS)concentration in plasma of the SPC group increased by 16.30％(P＞0.05)at 1 hour after supplementation,while the AA group significantly increased by 21.84％(P＜0.05);the growth hormone(GH)concentration of the SPC and AA groups significantly increased by 9.98％and 11.89％at 2 hours after supplementation(P＜0.05);The insulin like growth factor-Ⅰ(IGF-Ⅰ)concentration of AA group significantly increased by 6.96％at 0 hours before supplementation(P＜0.05);The glucose in plasma of SPC group significantly reduced by 18.20％at 2 hours after supplementation(P＜0.05).In conclusion,supplemented with 250 mg/kg BW SPC and 50 mg/kg Arg+50 mg/kg Lys could increase the GH and IGF-Ⅰ levels in plasma,and improve the weight gain of suckling lambs.
soy protein concentrateargininelysinelambsgrowthgrowth axis hormone
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