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首页> 外文期刊>Tropical Animal Health and Production >Effects of level of concentrate supplementation on growth performance of Arsi-Bale and Boer × Arsi-Bale male goats consuming low-quality grass hay
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Effects of level of concentrate supplementation on growth performance of Arsi-Bale and Boer × Arsi-Bale male goats consuming low-quality grass hay

机译：浓缩液添加量对低质草干草的Arsi-Bale和Boer×Arsi-Bale雄性山羊生长性能的影响

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摘要

Eighteen Arsi-Bale (local) and 18 Boer × Arsi-Bale (crossbred) male goats, initially approximately 10 months of age, were used in a 12-week experiment to investigate potential interactions between genotype and nutritional plane in growth performance, carcass and skin characteristics, and mass of non-carcass components. Grass hay (6.7% crude protein and 71.9% neutral detergent fiber) was consumed ad libitum supplemented with 150, 300, or 450 g/day (dry matter; low, moderate, and high, respectively) of a concentrate mixture (50% wheat bran, 49% noug seed cake, and 1% salt). Initial body weight was 20.7 and 14.0 kg for crossbred and local goats, respectively (SE = 0.36). Hay dry matter intake was greater (P < 0.05) for crossbred vs. local goats (461 and 429 g/day) and similar among concentrate levels (438, 444, and 451 g/day for high, moderate, and low, respectively; SE = 4.7). Average daily gain was greater (P < 0.05) for crossbred than for local goats (36.6 and 20.8 g) and differed (P < 0.05) among each level of concentrate (43.7, 29.6, and 12.8 g for high, moderate, and low, respectively). Dressing percentage was similar between genotypes (41.1% and 41.1% live body weight for crossbred and local goats, respectively; SE = 0.59) and greater (P < 0.05) for high vs. low (43.5% vs. 38.7% live body weight). Carcass weight differed (P < 0.05) between genotypes (9.23 and 6.23 kg for crossbred and local goats, respectively) and high and low (8.80 and 6.66 kg, respectively). Carcass concentrations of physically dissectible lean and fat were similar between genotypes and high and low concentrate levels. There were few differences between genotypes or concentrate levels in other carcass characteristics such as color and skin properties. Relative to empty body weight, the mass of most non-carcass tissues and organs did not differ between genotypes. However, the low concentrate-level mass of omental–mesenteric fat was greater (P < 0.05) for local vs. crossbred goats (1.06% vs. 0.54% empty body weight, respectively). In conclusion, growth performance and carcass weight advantages from crossing Boer and Arsi-Bale goats were similar with a low-quality basal grass hay diet regardless of level of supplemental concentrate.
机译：最初约10个月大的18头Arsi-Bale（本地）和18头Boer×Arsi-Bale（杂交）公山羊被用于一项为期12周的实验中，以研究基因型和营养平面之间在生长性能，car体和生长方面的潜在相互作用。皮肤特征以及非-体成分的质量。随意摄入草干草（6.7％的粗蛋白和71.9％的中性洗涤剂纤维），每天补充150、300或450 g（干物质；分别为低，中和高）的浓缩混合物（50％小麦）米糠，49％的Noug种子饼和1％的盐）。杂交山羊和当地山羊的初始体重分别为20.7和14.0 kg（SE = 0.36）。与本地山羊（461和429 g /天）相比，杂交山羊的干草干物质摄入量更大（P <0.05），而高，中和低水平的精饲料水平分别相似（438、444和451 g /天）； SE = 4.7）。杂种的平均日增重（P <0.05）高于本地山羊（36.6和20.8 g），高，中，低水平的每种精矿水平（43.7、29.6和12.8 g）均不同（P <0.05），分别）。不同基因型之间的穿衣率相似（杂交山羊和本地山羊活体体重分别为41.1％和41.1％； SE = 0.59），高与低之间分别为（43.5％与38.7％活体重）和更大（P <0.05）。 。基因型（杂交山羊和本地山羊分别为9.23和6.23千克）与高和低（分别为8.80和6.66千克）之间的体重量不同（P <0.05）。在基因型与高，低浓缩物水平之间，可身体分解的瘦肉和脂肪的concentrations体浓度相似。在其他car体特征（例如颜色和皮肤特性）上，基因型或浓缩水平之间几乎没有差异。相对于空体重，基因型之间大多数非car体组织和器官的质量没有差异。但是，本地山羊和杂种山羊的网状肠系膜脂肪低浓度水平更大（P <0.05）（分别为1.06％对0.54％空体重）。总之，无论补充浓缩物的水平如何，使用低品质的基草干草饲喂杂交的Boer和Arsi-Bale山羊，其生长性能和performance体重量优势均相似。

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