Inaugural ASAS–CAAV Asia Pacif ic Rim Conference Abstracts

T288 Effect of Aspergillus meal prebiotic (Fermacto) onperformance of broiler chicks fed a low-protein grower diet. S. Amirdahri,H. Janmohammadi*, A. Taghizadeh, and A. Rafat, Tabriz University, Faculty ofAgriculture, Tabriz, Iran.Prebiotics have a significant effect on body weight gain and feed-to-gain ratio(Piray et al, 2007). The objective of this research was to study the effectivenessof adding prebiotic on broiler growth performance fed low-protein growerdiets. Two hundred forty day-of-hatch broiler chickens of the Ross 308 strainwere randomly allocated to 6 treatments with 4 replicates each in a CRDdesign. Three groups received an experimental diet formulated to meet theRoss guide nutrient requirements for CP (21%) in the grower diet from d 11to 28 and other nutrients with 3 levels of prebiotic (0.0, 1.5, and 3.0 g /kg inthe basal diets). The other 3 groups received a diet deficient in CP (19%) withthe same 3 levels of prebiotic. Feed intake and body weight gain of chickenswere recorded weekly, and the feed-to-gain ratio was calculated as the unit ofeaten feed per unit of body weight gain (g/g). In the grower period (11 to 28d) supplementation of prebiotic decreased feed intake only in the diet deficientin protein with 1.5 g of prebiotic/kg. Addition of prebiotic to the low-proteindiets did not improve body weight compared with the control, and this trialwas the lowest of groups that received the diet deficient in protein with 1.5g of prebiotic/kg (P < 0.05). Addition of prebiotic into the standard and lowproteindiets did not affect weight gain, but this trial was lowest in groups thatreceived the diet deficient in protein with 1.5 g of prebiotic/kg (P < 0.05).Chicks fed a low-protein diet with 1.5 g of prebiotic/kg did not show significantdifferences in weight gain compared with those fed standard protein diets.Chicks fed the low-protein diet without prebiotic had the lowest FCR value.Table 1. Mean feed intake, weight gain and FCR in grower periodDiets 1 Feed intake Body weight Weight gain FCRSP + 0 % P (control) 1.202 a 0.930 a 0.772 ab 1.557 abSP + 0.15% P 1.181 a 0.907 ab 0.758 abc 1.561 abSP + 0.3% P 1.210 a 0.935 a 0.761 abc 1.592 abLP + 0 % P 1.162 ab 0.923 a 0.783 a 1.487 bLP + 0.15% P 1.111 b 0.858 b 0.716 bc 1.550 abLP + 0.3% P 1.169 a 0.884 ab 0.712 c 1.653 aSEM 0.010 0.010 0.009 0.0191SP = standard protein; P = prebiotic; LP = low protein.Key Words: prebiotic, performance, broilerT289 Effects of different feeding manners on meat qualityand antioxidative property in Chinese yellow male broilers. Shouqun Jiang*,Yingcai Lin, Guilian Zhou, Fang Chen, and Zongyong Jiang, Key Laboratoryof Animal Nutrition and Feed (South China), Ministry of Agriculture of P.R. China, Guangdong Public Laboratory of Animal Breeding and Nutrition,Institute of Animal Science, Guangdong Academy of Agricultural Sciences,Guangzhou, Guangdong, P.R. China.This study examined responses of male broilers to 2 different feeding mannersduring a 42-d production cycle. Four hundred Chinese yellow-feathered malebroilers at 21 d of age were allotted randomly into 2 groups. One group wasreared in indoor floor pens (0.38 m 2 /bird; floor-pen rearing group), and theother was maintained at the same site in identical pens but had access to apaddock (1.88 m 2 /bird; scattered feeding group). Each treatment group had 5replicates with 40 birds per replicate. Both groups had free access to the samegrower-finisher diets. The results showed that no difference was observed ingrowth performance, semi-eviscerated percentage, eviscerated percentage,breast meat percentage, thigh meat percentage, or subcutaneous fat percentage(P > 0.05) between feeding treatments. Scattered feeding chicks exhibitedsignificantly lower abdominal fat percentage(P < 0.05), lower meat shearforce 31.41%, greater pH value 3.54%, and less drip loss 29.12% than thoseof floor-pen rearing manner (P < 0.05). Meat color L* and a* values were notsignificantly influenced by the treatments (P > 0.05). Breast meat color b* valuedecreased by 19.04% (P < 0.05) in scattered feeding chicks. The chicks inscattered feeding displayed significantly less muscle fiber diameter and greatermuscle fiber density than those of floor-pen rearing (P < 0.05). Serum uric acidN concentration did not differ between groups (P > 0.05). Broiler chicks inscattered feeding exhibited greater serum glutathione peroxidase and catalasePoultry Environment and Management Postersactivities by 12.36% (P < 0.05) and 55.13% (P < 0.05), respectively. The serummalondialdehyde content of scattered feeding chicks was greater than that ofthe control group (P < 0.05). Finally, when compared with floor-pen rearingmanner, scattered feeding broiler chicks seemed to have better meat quality andimprove oxidative stability of meat, which was mainly related with their greatermovement amount under the conditions of scattered feeding.Key Words: feeding manner, meat quality, Yellow broilerT290 Impacts of goose stocking density in a water fowl-fishproduction system on water bacterial pollution, breeding, and growinggoose production performance. D. Jiang*, X. Zhang, Y. Pan, A. Shun, and Z.Shi, South China Agricultural University, Guangzhou, Guangdong, China.One of the problems in a water fowl-fish production system is the water quality,which may exert detrimental effects on poultry production performance.To unravel the causes of such problems, 2 experiments were conducted.In experiment 1, 2 goose breeding flocks were selected from Farm N withnormal or accepted production performance. These flocks differed slightly instocking density on water, which was 0.5 (A flock) or 0.75 (B flock) geese/m 2 of water surface. Counts of total bacteria, Escherichia coli, Salmonella,and LPS (lipopolysaccharide, endotoxin) concentrations in water and in theplasma of geese were all significantly higher (P < 0.05) in B flock than in Aflock. Meanwhile, mid-incubation embryo mortality was significantly higher(P < 0.01) but hatchability of fertile eggs was significantly lower (P < 0.05)in B than in A. There also existed a decreasing tendency in bacteria counts,LPS concentrations, and embryo mortality from summer to winter, whereashatchability increased from winter to summer. In addition, LPS concentrationsin the allantoic fluid were significantly higher (P < 0.01) in dead 25-d embryosthan in live 25-d embryos. Experiment 2 compared the growth performance ofgoslings from a poor reproductive performance farm (Farm P) with those fromFarm N. Farm P had higher stocking density and lower egg fertility and fertileegg hatchability than those on farm N in summer. Plasma LPS concentrations ofFarm P geese were significantly higher (P < 0.01) than in farm N geese. Likewise,goslings from Farm P also exhibited less weight gain (P < 0.01) during the first5 wk of age. Upon slaughter at marketing weight, Farm P goslings had less (P