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首页> 外文期刊>Tropical Animal Health and Production >Effect of feeding olive-pulp ensiled with additives on feedlot performance and carcass attributes of fat-tailed lambs.
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Effect of feeding olive-pulp ensiled with additives on feedlot performance and carcass attributes of fat-tailed lambs.

机译：饲喂添加了添加剂的橄榄纸浆对肥育羔羊的饲养性能和car体特性的影响。

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Feed cost has a significant effect on the economic efficiency of feedlot lambs; therefore, the use of low-cost non-conventional feedstuffs, such as olive pulp (OP), has the potential to decrease the production costs. Because optimum inclusion of OP-treated silages has not been determined in feedlot lambs, an experiment was conducted to determine the effect of inclusion of OP ensiled with additives in the diet on the feedlot performance and carcass attributes of feedlot lambs. Ram lambs of Mehraban and Ghezel breeds (n=50 lambs per breed) were randomly allotted to 10 groups and fed with one of the nine diets containing OP silage or a control diet. Silage treatments were: (1) OP silage without additives (OPS), (2) OP ensiled with 8% beet molasses and 0.4% formic acid (OP-MF), and (3) OP ensiled with 8% beet molasses, 0.4% formic acid and 0.5% urea (OP-MFU). The control diet contained 50% alfalfa hay and 50% barley grain. Three levels from each silage were chosen to replace the barley grain (10, 20, or 30% dry matter basis). The lambs were slaughtered after 92 days, and the average daily gain (ADG), feed conversion ratio (FCR), and carcass characteristics were determined. Feeding OPS to fat-tailed lambs, at an inclusion level of 30%, decreased the carcass dressing percentage, mainly as a result of decreased brisket percentage, but the ADG and FCR values were not adversely affected. Ghezel lambs had higher ADG than Mehraban lambs, but the visceral fat weight percentage, flap weight percentage, and back fat depth were higher in Mehraban. The crude protein content in the longissimus dorsi (LD) muscle was higher in Ghezel, but the dry matter percentage was higher in Mehraban (P<0.05). Other attributes were not significantly affected by breed (P>0.05). Most carcass characteristics, including major cuts, were not affected by OPS feeding; therefore, feeding OPS (up to 30%) can be economical for feedlot lambs. Most carcass characteristics, including major cuts, were not affected by OPS levels used in this experiment; therefore, inclusion of OPS (up to 30%) in the diet may reduce the cost of raising feedlot lambs. This also could help alleviate the problem of storage of OP in oil factories.
机译：饲料成本对饲养场羔羊的经济效率有重大影响;因此，使用低成本的非常规饲料，例如橄榄纸浆（OP），有可能降低生产成本。由于尚未确定肥育小羊羔中经OP处理的青贮饲料的最佳掺入量，因此进行了一项试验，以确定在饲料中掺入青​​贮添加剂的OP对肥育小羊羔的饲养性能和car体特性的影响。将Mehraban和Ghezel品种的公羊羔羊（每个品种n = 50只羔羊）随机分配给10组，并饲喂含有OP青贮饲料或对照饲料的9种饲料之一。青贮饲料的处理方法为：（1）不添加添加剂（OPS）的青贮饲料，（2）用8％甜菜糖蜜和0.4％甲酸（OP-MF）包裹的OP，以及（3）用8％甜菜糖蜜，0.4％包裹的OP。甲酸和0.5％尿素（OP-MFU）。对照饮食包含50％的苜蓿干草和50％的大麦谷粒。从每种青贮饲料中选择三个水平来替代大麦籽粒（以干物质的10％，20％或30％为基准）。 92天后宰杀羔羊，确定平均日增重（ADG），饲料转化率（FCR）和car体特性。以30％的夹杂水平向肥尾羔羊饲喂OPS，降低了cas体覆盖率，这主要是由于降低了胸肉的百分比，但是ADG和FCR值并未受到不利影响。 Ghezel羔羊的ADG高于Mehraban羔羊，但是Mehraban的内脏脂肪重量百分比，皮瓣重量百分比和背部脂肪深度更高。 Ghezel背最长肌（LD）肌肉中的粗蛋白含量较高，而Mehraban中干物质百分数较高（P <0.05）。其他属性没有受到品种的显着影响（P> 0.05）。大多数S体特征，包括主要割伤，不受OPS喂养的影响;因此，饲喂OPS（最高30％）对于育肥场羔羊是经济的。大多数car体特征，包括主要割伤，均不受本实验中所用OPS水平的影响。因此，在日粮中添加OPS（最高30％）可以减少饲养肥育小羊的成本。这也可以帮助减轻石油工厂中OP的存储问题。

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