Effects Of Glutamine-supplementation In Dietary Protein Levels On The Growth Performance Nad Related Blood Physiologic Biochemical Parameters Of Weanling Piglets

In this study, Gln appropriate protein levels in pigs diets was investigated through studying effects of glutamine (Gln) in dietary protein levels on the growth performance, blood biochemical ,immuno function and hormonal indicators of weanling piglets. It provide experimental evidence and scientific guidance to ease the piglet stress, reduce diarrhea rates, the rational use of Gln.One hundred and twenty crossbred Landrace×Large white weaned piglets at the age 28 days were selected and randomly divided into 6 treatment with 2 replicates. There was no significant difference between treatment groups on Initial body weight. Control groups incluingⅠ,ⅢandⅤwere fed with basal diet and the protein levels of diets of the three groups were 18%, 20%,22%. While the pigs of experimental groups ofⅡ,ⅣandⅥwere fed with the basal diet of control groupsⅠ,ⅢandⅤadded 1.25% glutamine respectively. The results of the experiment conducted 28 days indicated that:①The ADG of pigs in groupⅥ、Ⅳ、Ⅱrespectively increased 8.45%(P>0.05)、4.11%(P<0.05)and 23.78%(P<0.05)compared with their control groups during the first two weeks; The ADG of pigs in groupⅥ、Ⅳ、Ⅱrespectively increased 2.99%(P>0.05)、6.98%(P<0.05)and 2.83%(P>0.05)compared with their control groups during the second two weeks ;during the whole experiment, the ADG of pigs in groupⅥ、Ⅳ、Ⅱrespectively increased5.23%(P>0.05)、13.19%(P<0.05)and 9.20%(P>0.05)compared with their control groups. The result of feed intake is that the average feed intake of pigs in groupⅥ、Ⅳ、Ⅱwith a boosting trend compared with their control groups, but a significant diversity(P>0.05). The FCR of pig s in groupⅥ、Ⅳ、Ⅱdescended 4.26%(P>0.05)、4.91%(P>0.05)and 11.49%(P<0.05)during the first two weeks compared with their control groups; The FCR of pigs in groupⅡdescended 13.00%(P<0.05)compared with the control group, the other two groups have a significant diversity(P>0.05)compared with their control groups.②To compared with their control groups, The digestibility of crude protein of pigs in groupⅥ、Ⅳ、Ⅱrespectively increased 4.76%(P<0.05)、3.69%(P<0.05)and 0.93% (P>0.05); The digestibility of crude fat respectively increased了6.30%,5.64%,7.15% and was significant .③To compared with their control groups,the ratio of diarrhea of groupⅥ、Ⅳ、Ⅱrepectively significantly decreased by 60.76%、60.58% and 35.12%;GroupⅣwas 31.45% , 39.92% lower than groupⅣ,Ⅱand was significant.④The BUN of groupⅥ、Ⅳ、Ⅱwas descended by 23.31%(P<0.05)、34.38%(P<0.05)and 37.78% compared with control respectively , groupⅣwas 41.60%(P<0.05)and 24.51%(P<0.05)lower than groupⅥandⅡ;The Serum TP , GLU of groupⅥ、Ⅳ、Ⅱhad a elevated trend and A/G depressed. TP was increased by 7.26%(P<0.05)、24.58%(P<0.05)and 5.89%(P>0.05), and 9.10%(P<0.05)、24.66%(P<0.05)and 26.08%(P<0.05)for GLU. The A/G was decreased by 8.32%(P<0.05)、12.60%(P<0.05)and 1.54%(P>0.05) than control ,GroupⅥ、Ⅳwas 17.05%(P<0.05)and 13.95%(P<0.05) than groupⅡseparately.⑤The IgG of groupⅥ、Ⅳ、Ⅱwas repectively increased by 11.77%(P<0.05)、26.58%(P<0.05)and 12.35%(P<0.05), GroupⅣwas 9.89%(P<0.05)and 5.26%(P>0.05)higher thanⅥ、Ⅱ; That of C3 was 18.75%(P<0.05)、18.75%(P<0.05)and 26.67%(P<0.05)higher, and the IgM was increased by 19.23%(P<0.05)、40.00%(P<0.05)and 38.09%(P<0.05)respectively .⑥The GH of groupⅥ、Ⅳ、Ⅱwas repectively increased by 21.31%(P<0.05)、22.95%(P<0.05)and 35.29%(P<0.05)than control , and groupⅥ、Ⅳwas 7.25%(P<0.05)and 8.70%(P<0.05)higher than groupⅡ; The T3 of groupⅥ、Ⅳ、Ⅱwas increased 48.94%(P<0.05)、43.27%(P<0.05)and 31.07(P<0.05)than control ; The Cor of groupⅥ、Ⅳ、Ⅱwas 18.29%(P>0.05)、20.58%(P>0.05)and 16.36%(P>0.05) lower than control , but no significant between each group.