Effects Of Compound Nutrients On Production Performance,rumen Fermentation And Blood Indexes Of Mutton Sheep

To study the effects of compound nutrients on the production performance,rumen fermentation and blood indicators of mutton sheep.In the experiment,36Dorper×Thin-Tailed Han crossbred meat lambs(females)with good body condition and similar weight(30.20±0.80 kg)were selected and randomly divided into 3 groups with 6replicates in each group and 2 sheep in each replicate.Bar rearing.The control group was a basal diet without compound nutrients,and the test group was supplemented with 2.5 and 5g/kg compound nutrients in the basal diet,respectively.The trial period is 74 days,of which the pre-trial period is 14 days and the trial period is 60 days.The test results are as follows: 1)The addition of compound nutrients to the diet has no significant effect on the final weight and dry matter intake(DMI)of mutton sheep(P>0.05).The average daily gain(ADG)of the 2.5 g/kg compound nutrient supplement group)Significantly increased and feed conversion rate(FCR)significantly decreased(P <0.05);2)the addition of compound nutrients to the diet had no significant effect on the pre-slaughter live weight,carcass weight,slaughter rate,eye muscle area and GR value of mutton sheep(P>0.05);3)Adding2.5 g/kg of compound nutrients to the diet can significantly increase the content of rumen mycelial protein(MCP)of meat sheep(P <0.05),and adding different concentrations of compound nutrients can significantly reduce the total volatility in the rumen The content of TVFA(P <0.05),but has no significant effect on p H,ammoniacal nitrogen(NH3 N),various volatile fatty acids and the ratio of acetic acid to propionic acid(P>0.05);4)Diet Adding 2.5 g/kg of compound nutrients can significantly increase the concentration of high-density lipoprotein(HDL)in the serum of mutton sheep(P <0.05),and adding compound nutrients has no significant effect on other serum biochemical indicators(P>0.05);5)In the diet The addition of compound nutrients has no significant effect on the levels of interferon γ(IFN-γ),interleukin 10(IL-10),tumor necrosis factor α(TNF-α)and immunoglobulin A(Ig A)in the plasma of mutton sheep(P>0.05),Adding 2.5 g/kg of compound nutrients can significantly reduce the content of sheep interleukin 1β(IL-1β)in the plasma of mutton sheep(P <0.05),and significantly increase the content of sheep immunoglobulin M(Ig M)(P <0.05).Different concentrations of compound nutrients can significantly reduce the content of interleukin 8(IL-8)in the plasma of mutton sheep(P<0.05),and the addition of 5 g/kg of compound nutrients can significantly reduce the content of immunoglobulin G(Ig G)in the plasma of mutton sheep(P <0.05).In summary,adding compound nutrients to the diet can regulate the rumen fermentation of Duhan hybrid mutton sheep,improve the immunity of mutton sheep,and then improve its production performance.According to the results of this experiment,the optimal supplementary dose of compound nutrients in the mutton sheep diet is 2.5 g/kg.