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首页> 外文期刊>Landbauforschung >Influence of vitamin B_(12) and Cobalt on growth of broiler chickens and Pekin ducks
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Influence of vitamin B_(12) and Cobalt on growth of broiler chickens and Pekin ducks

机译：维生素B_（12）和钴对肉鸡和北京烤鸭生长的影响

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The effects of dietary vitamin B_(12) and cobalt supplementation on feed intake, growth performance, feed-to-gain ratio, carcass composition, and nutrient content of breast meat of ducks were investigated in broilers and Pekin ducks. 768 male chickensand 384 male ducks were allocated to 8 dietary treatment groups (0/10/20/40 ug vitamin B_(12), 0.65 mg Co, 0.65 mg Co + 10 mug B_(12), 0.65 mg Co + 20 mug B_(12), 0.65 mg Co + 40 mug B_(12)) and fed for 35 or 49 days. The daily feed intake increased significantly from 76.3 to 81.3 g, the daily weight gain from 52.3 to 56.1 g, the final body weight from 1874 to 2007 g per broiler by raising the B_(12) concentration from 0 to 40 mug/kg. In the same way the supplementation of 0.65 mg Co improved the feedintake and thus the development of broilers. The feed-to-gain ratio was only affected in the first two weeks under higher B_(12) and B_(12) x Co concentration in the feed. The statistical evaluation of the single effects of vitamin B_(12) and Co and thecombined effect of vitamin B_(12) + Co on performance of ducks could not demonstrate on daily feed intake, body weight gain, and final body weight. The feed conversion was negatively affected by supplementation of Co. An increased supply for the animalswith vitamin B_(12) or Co induced a higher yield of breast meat by supplementation of 20 mug B_(12) and a higher percentage of breast meat and legs when adding on 0.65 mg Co. In the fresh breast matter of ducks was significantly higher water content anddecreased protein content of the 0.65 mg Co-Group compared to 0.65 mg Co + 40 mug B_(12)-Group. The results allow the conclusion, that 20 ug of vitamin B_(12) per kg feed meet the requirements of growing chickens and ducks for fattening. An additional supplementation of Co to feed does not have additional advantages for the birds.
机译：在肉鸡和北京烤鸭中，研究了日粮中维生素B_（12）和钴的添加对鸭肉采食量，生长性能，饲料增重比，car体组成和胸肉营养成分的影响。将768只雄鸡和384只雄鸭分为8个饮食治疗组（0/10/20/40 ug维生素B_（12），0.65 mg Co，0.65 mg Co + 10杯B_（12），0.65 mg Co + 20杯B_ （12），0.65 mg Co + 40杯B_（12）），喂养35或49天。通过将B_（12）浓度从0升至40杯/千克，每只肉鸡的日采食量从76.3克显着增加到81.3克，日增重从52.3到56.1克，最终体重从1874年到2007克。以相同的方式补充0.65 mg Co可以改善饲料摄入量，从而改善肉鸡的发育。进料比仅在前两周受到较高的饲料中B_（12）和B_（12）x Co浓度的影响。维生素B_（12）和Co的单一作用以及维生素B_（12）+ Co对鸭子性能的综合影响的统计评估无法证明日饲料摄入量，体重增加和最终体重。补充Co会对饲料的转化产生不利影响。补充20杯B_（12）可以增加动物体内维生素B_（12）或Co的含量，从而提高胸肉的产量，而当添加Co时，胸肉和腿的百分比也更高添加0.65 mgCo。与0.65 mg Co + 40马克杯B_（12）-Group相比，新鲜鸭胸肉中0.65 mg Co-Group的水分含量明显更高，并且蛋白质含量降低。结果可以得出以下结论：每公斤饲料20 ug维生素B_（12）可以满足成长中的鸡鸭的增肥需求。补充Co饲料对家禽没有额外的好处。

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