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首页> 外文期刊>Journal of Agriculture of the University of Puerto Rico >Performance and meat carcass characteristics of locally slaughtered sheep and goats raised by grazing native tropical grasses with or without supplementation1
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Performance and meat carcass characteristics of locally slaughtered sheep and goats raised by grazing native tropical grasses with or without supplementation1

机译：在有或没有补充的情况下通过放牧本地热带草种饲养的局部屠宰绵羊和山羊的性能和体特征1

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摘要

This study was divided into two parts. In the first part, data were collected from 57 sheep and 28 goats from different origins and slaughtered in abattoirs in the western region of Puerto Rico to develop a database of the carcass characteristics of small ruminant (SR) raised under traditional feeding management. The second part consisted of a feeding trial in which weaned lambs (n = 6) and kids (n = 6) were randomly assigned within species to one of two feeding regimes: with or without daily commercial concentrate (CC) supplementation, at the rate of 0.9% of body weight (BW) on a dry basis, to grazing native tropical grasses. Treatment effects on body weight gain, carcass characteristics, and meat quality were evaluated. The database on carcass characteristics of SR slaughtered commercially showed highly variable dressing percentages ranging from 37 to 46%, and 32 to 38% for sheep and goat, respectively, both species having similar (P > 0.05) average values. No differences were observed in dressing percentages between the sexes. Supplementation with CC increased (P < 0.05) total and daily BW gain in lambs by 2,580 and 40 g, respectively, when compared to the non-supplemented controls. In kid-goats, BW gains with supplementation were appreciably,but not significantly greater (P > 0.05) than without supplementation. Dressing percentage, and fore and hind trunk percentages did not vary (P > 0.05) between treatments for either species. There were no differences (P > 0.05) in pH, moisture, crude protein, and fat percentages of longissimus muscle between treatments in either species. This research revealed the need to develop a local grading system to standardize the meat and improve its quality. Similarly, genetic selection of animals as well as research on alternative less-expensive feed resources for finishing meat-type animals are necessary to improve quantity and quality of local small ruminant meat (SRM).
机译：本研究分为两个部分。在第一部分中，收集了来自不同来源的57只绵羊和28只山羊的数据，并在波多黎各西部地区的屠宰场屠宰了这些数据，以建立在传统喂养管理下饲养的小反刍动物car体特征的数据库。第二部分包括一项饲喂试验，其中将断奶的羔羊（n = 6）和孩子（n = 6）随机分配到以下两种喂养方式之一的物种中：每天添加或不添加商业性精矿（CC）占干重的0.9％（体重），以放牧天然热带草。评价了对体重增加，car体特性和肉质的处理效果。商业屠宰的SR car体特征数据库显示，绵羊和山羊的修整率差异很大，绵羊和山羊分别为37％至46％和32％至38％，这两个物种的平均值相似（P> 0.05）。男女之间的穿衣百分比没有差异。与未补充对照相比，补充CC可使羔羊的总BW增重和每日BW增高（P <0.05），分别为2,580和40 g。在小山羊中，补充体重后体重增加明显，但不明显大于未补充体重时（P> 0.05）。两种处理之间的敷料百分率，前躯干和后躯干百分率没有变化（P> 0.05）。两种处理之间的pH值，水分，粗蛋白和最长肌脂肪百分比均无差异（P> 0.05）。这项研究表明有必要开发一种当地的分级系统，以使肉类标准化并提高其质量。同样，对动物进行基因选择以及研究用于精制肉类动物的其他廉价饲料资源，对于提高本地小反刍动物肉（SRM）的数量和质量也是必要的。

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