논문 상세보기
pp.199-214
This study was conducted to investigate the effect of organic dietary metabolizable energy (ME) and crude protein (CP) on productivity, meat quality and blood composition of crossbred chicks (hanhyub 3 ho) for different growring periods. Experiments were factorially designed with ME 3,000, 3,100㎉/㎏ and CP 21, 22, 23% for starter (0-4wks); ME 3,100, 3,150, 3,200㎉/㎏ and CP 18, 19, 20% for grower (5-8wks); ME 3,100, 3,150, 3,200㎉/㎏ and CP 15, 16, 17% for finisher (9-10wks). The total number of chicks and replicate of each treatment for starter, grower, finisher were 720, 4; 702, 6; 468, 4, respectively. The diets was mixed with more 90% organic feed ingredients. The productivity were not influence by dietary ME for starting period. Weight gain and feed intake were significantly increased in CP 23% treatment than CP 21, 22% treatment (P＜0.05). FCR was improved as dietary CP increased (P＜0.05). Weight gain was tended to be increased by decreaing ME content and increasing CP contents for growing period. Feed intake showed no difference among the ME and CP treatment groups. FCR improved significantly in CP 19, 20% compared with CP 18% (P＜0.05). Weight gain was not significantly different between ME and CP treatments for finishing period. Feed intake was lower in ME 3,150, 3,200㎉/㎏ than the ME 3,100㎉/㎏ treatment (P＜0.05). FCR was higher in ME 3,100㎉/㎏ than ME 3,150, 3,200㎉/㎏ treatment (P＜0.05). Interaction on productivity was not exited between ME and CP treatment groups for different feeding periods. There was no difference in the total protein, albumin, glucose and triglyceride amount in blood depending on dietary ME and CP contents. Total cholesterol was greatly decreased in ME 3,100㎉/㎏ than the ME 3,200㎉/㎏ (P＜0.05), but not different between CP treatments. Cooking loss of breast meat was lower in ME 3,150㎉/㎏ than the ME 3,200㎉/㎏ (P＜0.05). Moisture, shear force and pH were not statistically different among treatments. Protein solubility was increased by increasing ME and CP in diets. The collagen was tended to increase as dietary ME increased. Redness was remarkably higher in ME 3,150㎉/㎏ than the ME 3,100㎉/㎏ (P＜0.05). Yellowness of meat fed ME 3,150㎉/㎏ showed significantly lower than other treatments (P＜0.05). Therefore, the optium ME and CP to improve the productivity for each period were 3,000㎉/㎏, 23%; 3,100㎉/㎏, 19%; 3,150㎉/㎏, CP 16%, repectively.
