Zilpaterol提高喂养的性能和制造产量concentrate-finished宰杀牛。

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劳伦斯•TE Gasch CA, Hutcheson JP,霍金JM

Zilpaterol提高喂养的性能和制造产量concentrate-finished宰杀牛。

J动物科学。2011年7月,89 (7):2170 - 5。doi: 10.2527 / jas.2010 - 3422。Epub 2011年1月28日。

PubMed ID

21278106 (在PubMed

]

文摘

本研究的目的是量化的影响zilpaterol盐酸盐(ZH型)喂养的性能和制造产量concentrate-finished宰杀牛。三百二十年商业捕杀牛(2 - 10岁)从牧场在密苏里州和南达科他州,分配给1 2治疗:1)控制饮食不含ZH型和2)食物中包含了ZH型。奶牛喂养了75、88、或110 d,获得了控制配给直到ZH型治疗开始。屠宰前24天,古银喂养开始指定治疗笔;奶牛喂养ZH型(8.33毫克/公斤(100% DM)]为20 d屠宰前一段4 d撤军。未发现差异(P > 0.05)首次BW 2治疗组或DMI之间。最后BW (640.5 vs 619.1公斤),ADG过去24 d (2.75 vs 2.17公斤),F和G:过去24 d(0.160和0.126)大(P < 0.01)在牛ZH型比美联储控制奶牛。没有差异(P > 0.05)被发现精益或骨骼成熟度评分,脂肪厚度,LM, HCW或计算产量等级2治疗组。喂养ZH型增加(P < 0.01) HCW (390.1 vs 369.2公斤),穿着尸体收益率(59.45% vs 61.01),和LM区(93.3 vs 86.5厘米(2))和降低(P < 0.01)大理石花纹的分数(轻微(63)和轻微的(86))与控制奶牛。牛美联储ZH型更大(P < 0.05)原始权重查克(模拟)招标(2.63 vs 2.28公斤),lip-on肋眼牛排卷(13.54 vs 12.56公斤),顶级沙朗对接(12.74 vs 11.82公斤),最高(内部)轮(14.58 vs 12.89公斤),和去皮关节(12.87 vs 11.51公斤),收益率下降的百分比机械刀礼品(1.15和1.35%; P<0.01) and more top (inside) rounds (3.71 vs. 3.46%; P=0.02) than the control cows. No differences (P>0.07) were found for the remaining fabrication yield attributes. The ZH-treated cows had greater (P<0.05) fabrication dollar values for chuck (mock) tender (8.82 vs. 7.66 $/carcass), lip-on rib eye roll (64.20 vs. 59.56 $/carcass), strip loin (0 x 1; 49.13 vs. 44.75 $/carcass), top sirloin butt (35.60 vs. 33.01 $/carcass), bottom round (flat; 44.23 vs. 39.23 $/carcass), top (inside) round (60.30 vs. 53.33 $/carcass), knuckle (peeled; 44.26 vs. 39.57 $/carcass), and total salable yield (879.50 vs. 803.70 $/carcass) than control cows. These results suggest the feeding of ZH to concentrate-finished cull cows enhances production efficiencies and can add new value to the cull cow market.

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