Inaugural ASAS–CAAV Asia Pacif ic Rim Conference Abstracts

Broilers were fed in pen and free access to feed and water. All broilers fedthe diet with ND-JCSM were dead in 2 wk with the mortality peak in the firstweek, whereas there was lower mortality in the control (1.11 and 0%) or ND-JCSM group (4.44 and 0%). Birds fed the control diet had higher BWG (670.1and 538.9 g, 1,625.4 and 1,502.0 g; P < 0.0111), and ADFI (1,034 and 935.1,3,124.4 and 2,916.4 g; P < 0.0213) than those fed the D-JCSM at d 1 to 21 andd 22 to 42, and lower FCR (1.55 and 1.74; P < 0.0001) at d 1 to 21. There wereno significant differences for the relative weight of spleen, bursa of Fabricius,thymus, heart, gizzard, proventriculus, pancreas, liver, and kidney. Fattyinfiltration of dilated liver cells, atrophic gizzard, nephrohemia, pulmonarycongestion, and erosions of small intestinal mucosa were found in the deadbroilers fed ND-JCSM. At d 7, liver hyperemia, pulmonary congestion, fattyinfiltration of dilated liver cells, and atrophic gland cells of glandular stomachwere found in broilers fed D-JCSC, whereas pulmonary congestion, dilatedliver cell congestion, and slight dilated kidney congestion were found in birdsfed DJCSC at d 42. The results showed that ND-JCSC was lethally toxic tobroilers and DJCSM could be used as a SBM substitute.Key Words: Jatropha curcas seed meal, broiler, performance36 Nutrient-sparing effects of virginiamycin in broiler diet.J. Wan* 1 , M. Zhong 3 , K. Zhang 1 , and X. Luo 2 , 1 Institute of Animal Nutrition,Sichuan Agricultural University, Ya’an, Sichuan 625014, P.R. China, 2 MineralNutrition Research Division, Institute of Animal Science, Chinese Academy ofAgricultural Sciences, Beijing 100193, P.R.China, 3 Phibro Corporation LimitedShanghai Rep. Offi ce, Shanghai 200336, P.R.China.An experiment was conducted to investigate the energy, crude protein, andnonphytate phosphorus sparing effects of virginiamycin supplemented inbroiler diet. Four hundred fifty 1-d-old Arbor Acres broilers were randomlyassigned to 1 of 5 treatments with 15 replicate cages of 6 birds (3 male and 3female) per cage. The dietary treatments were 1) positive control (PC, basal dietwithout antibiotic with ME 12.26 MJ/kg, CP 21.75% nonphytate phosphorus(NPP) 0.41%); 2) negative control 1 (NC1, ME, CP, and NPP were decreased,respectively, by 104.6 kJ/kg, 1 percentage point, and 0.04 percentage points);3) negative control 2 (NC2, ME, CP, and NPP were decreased, respectively,by 209.2 kJ/kg, 2 percentage points, and 0.04 percentage points); 4) NC1supplemented with 15 mg/kg of virginiamycin; and 5) NC2 supplemented with15 mg/kg of virginiamycin. Body weight, average feed intake (ADFI), and feedconversion ratio (FCR) were recorded. Compared with PC, the BW at 21 d,ADFI, and ADG at 1 to 21 d of both NC groups were significantly lower (P< 0.01), and higher for FCR. The performance of NC2 also was significantlylower than NC 1 at 1 to 21 d. At 22 to 49 d or 1 to 49 d, there were no significantdifferences between PC and NC1, but significant between NC2 to PC or NC1.With the addition of virginiamycin in diets of NC1 or NC2, the BW at 21 d,ADG at 1 to 21 d, or FCR (only for NC2) were improved significantly but notat 22 to 49 or 1 to 49 d. There were significant difference between the NC2with virginiamycin and PC group, but no significant difference between theNC1 with virginiamycin and PC group. The results showed that there werenutrient-sparing effects for virginiamycin. With the addition of virginiamycinat 15 mg/kg, the dietary nutrient levels could be lower with ME 104.6 kJ/kg, CP1 percentage point, and NPP 0.04 percentage points.Key Words: virginiamycin, broiler, nutrient sparing effect37 Effects of dietary soybean isoflavone on meat quality andoxidative stability in yellow broilers. Shouqun Jiang*, Zongyong Jiang,Yingcai Lin, Guilian Zhou, and Chuntian Zheng, Key Laboratory of AnimalNutrition and Feed(South China), Ministry of Agriculture of P. R. China,Institute of Animal Science, Guangdong Academy of Agricultural Sciences,Guangzhou, Guangdong, P.R. China.The present study aimed at investigating the effects of a synthetic soybeanisoflavone (SI) on meat quality and oxidative stability in yellow broliers. Atotal of 1,500 43-day-old birds were randomly divided into five treatmentswith six replicates per treatment (50 birds per replicate). Birds were fed dietssupplemented with 0, 10, 20, 40, or 80 mg/kg SI, respectively. At 63 d of age,birds were deprived of feed for 12 h; 12 broilers per treatment group (two birdsper replicate) were killed by cervical dislocation for meat quality determinationsand biochemical analyses. The progress of meat quality in the raw meat samplesduring storage was determined after 24, 48, 72, and 96 h. The activity of totalsuperoxide dismutase (T-SOD) and the concentrations of malondialdehyde(MDA) and lactic acid in meat were measured during refrigerated storage.Meanwhile, the expressions of glutathione peroxidase (GPX) and catalase(CAT) genes were determined by RT-PCR method. The results showed thatsupplemental 40 mg/kg of SI significantly increased meat color a* value after24 h of refrigerated storage (P < 0.05), pH value 24 h and 96 h postmortem (P