Effect of supplemented with soybean protein concentrate,arginine and lysine on the growth and growth axis hormone levels of suckling lambs
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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