Effect Of L-arginine On Growth Performance, Organ Development And Blood Biochemical Measurements Of Yangzhou Geese After Immunological Stress

The objective of this study was to evaluate the effect on growth performance and visceral weight in male goose after immunological stress challenge, and the role of L-arginine(L-arg) played in easing immunological stress challenge. It can provide scientific basis for Arg level in practical dietary of goose and advance the development of goose industry.1,Effect of L-arginine on Growth and Development of Gosling after Lipopolysaccharide ChallengeAn experiment was conducted to study the effect of dietary L-arginine(Arg) concentration on growth performance and visceral weight in male goose after lipopolysaccharide(LPS) challenge. 128 14-day-old male geese were divided into 4 treatments (4 duplicates per treatment and each duplicate had 8 geese) in random. The Control Group was injected with sterile saline and fed basic dietary (Group A). The Group B was injected with LPS and fed basic dietary. The Group C and D were injected with LPS and fed basic dietary added 0.5% and 1.0%L-Arg respectively. The whole experiment was ended at 21 day. On the 15,17,19-day-old, geese in B,C and D were injected with 0.5mg/kg BW LPS, whereas geese in group A were injected with an equivalent amount of sterile saline. The geese were weighed on the 14 and 21-day-old. The results showed that, 1) LPS reduced the daily weight gain (P<0.05), and 0.5% Arg alleviated the decrease of the daily weight gain induced by LPS to some extent; 2) LPS reduced the weight of bursa fabricius (P<0.05), and 0.5% Arg alleviated the decrease of the weight of bursa fabricius induced by LPS to some extent; LPS reduced the weight of bursa fabricius index (P<0.05), 0.5% or 1% Arg increased the spleen index after LPS challenge; 3) LPS induced the length of bowel, and 0.5% Arg alleviated the decrease of the length of Intestinal tract induced by LPS to some extent; 4) LPS increased serum total protein and globulin(P<0.05), and LPS induced the A/G(albumin/globulin)(P<0.05), 1% Arg increased serum GPT(P<0.05), LPS and 1% Arg increased serum GH(P<0.05), 1% Arg increased serum insulin after LPS challenge.2,Effect of Dietary Concentration of L-arginine on Growth in Male Geese during Immunological StressThe experiment was conducted to study the effect of dietary L-arginine (Arg) concentration on the growth performance and internal organ development in male goose after immunological stress. 24 28-d-old male geese were assigned to 3 groups. Each group of 8 birds had 4 replicate subgroups, each with 2 geese. The three groups included nonchallenged group (A), challenged group (B), 0.5% Arg group (C). At 28d of old, the geese were weighed one by one. At 29 and 43d of old, geese in F and G were injected with 0.7ml New castle disease-1(ND-1), whereas geese in group E were injected with an equivalent amount of sterile saline. At 42, 56 and 70d of old, the geese were weighed again. The results showed that: 1) The average weight gain of group C was higher than the other groups; 2) 0.5% Arg increased the length of duodenum (P<0.05); 3) ND-1 challenge increased the weight of liver (P<0.05); 4) ND-1 challenge increased the weight of spleen and induced the weight of thymus and bursa of fabricius, and 0.5% Arg alleviated the decrease of the change by ND-1 to some extent; 5) No significant difference in antibody titer was noted.These results indicated that immunological stress challenge have bad effect on gosling growth performance, and L-arginine could alleviate the stress response of gosling induced by immunological stress challenge to some degree.