การใช้เศษเหลือเครื่องในสัตว์ปีกเป็นแหล่งโปรตีนทดแทนปลาป่นในอาหารไก่ไข่ต่อสมรรถภาพการผลิตและคุณภาพไข่

Abstract

Poultry offal waste meal (POM) is one of the wastes, containing high protein and fat, from poultry slaughterhouses which is not used as human food, thus may create pollution problem. It contains crop, proventriculus, small intestine, large intestine, visceral and abdominal fat, therefore containing high protein and fat. This study aimed to assess the optimum level of POM as a protein source to substitute fish meal (FM) in laying hen diet. Six hundred heads of 48-week-old HyLine Brown laying hens, were used in a completely randomized design experiment of 24 weeks long. The hens were randomly divided into 5 treatments with 3 replicates per treatment. Each replicate, consisted of 40 birds was randomly placed in battery wire cages, which contained 4 heads/cage in an Evaporative cooling house. Experimental diets were 0, 25, 50, 75 and 100% of POM substitution for FM. All diets were adjusted to be iso-nitrogenous at 16% CP. While the ME values increased with the higher level of POM. It was found that POM from a broiler slaughterhouse in Chiang Mai and Lamphun, being autoclaved at 30 psi, 135 °C for 5 minutes and then dried in a hot air oven, had on DM basis; 70.69% CP, 26.52% EE, 0.40% CF and 5.55% ash. It had higher CP and EE, but lower ash than FM. The use of 75 and 100% POM to substitute FM decreased egg production, eggshell thickness, and eggshell breaking strength, while feed cost per dozen eggs and egg weight were significantly higher as compared to the control group (P<0.05). In conclusion, POM can be used to substitute FM in laying hen diets, during the last period before culling, up to 50% without adverse effect on production cost, egg quality and egg production.