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首页> 外文期刊>Animal Feed Science and Technology >Effects of dietary addition of wormwood (Artemisia montana Pampan) silage on growth performance, carcass characteristics, and muscle fatty acid profiles of beef cattle.
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Effects of dietary addition of wormwood (Artemisia montana Pampan) silage on growth performance, carcass characteristics, and muscle fatty acid profiles of beef cattle.

机译：日粮中添加艾草（青蒿）对肉牛生长性能，characteristics体特性和肌肉脂肪酸谱的影响。

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摘要

This study aimed to determine the effect of substituting rice straw with wormwood (Artemisia montana) silage on growth performance, carcass quality, and muscle fatty acid profiles of Hanwoo steers during the fattening period. Twenty steers (326 +or- 23 kg body weight) were blocked by body weight and assigned randomly to one of four treatments in which 0, 50, 100 or 150 g/kg of rice straw (dry matter (DM) basis) was substituted with wormwood silage. Concentrate feed mixtures containing crude protein and metabolizable energy values of 120 g/kg DM and 6.5 MJ/kg DM and 122 g/kg DM and 9.6 MJ/kg DM were used for the early and late fattening periods, respectively. The forages and concentrate feed mixtures were fed separately for 390 d and the forage to concentrate feed mixture ratio was changed from 7:3 (DM basis) initially to 1:9 at the end by increasing the concentrate proportion monthly. Wormwood silage had greater crude protein and ether extract concentrations, but lesser neutral detergent fiber concentration than rice straw. The C18:2 n-6 and C18:3 n-3 concentrations in rice straw were lesser than in wormwood silage (15 vs. 29 g/100 g fatty acid; 3 vs. 21 g/100 g fatty acid, respectively). Increasing the level of addition of wormwood silage linearly (P < 0.001) increased concentrate and total DM intake, and quadratically increased final body weight (P < 0.01) and average daily gain (P < 0.001), consequently, feed conversion ratio (DMI/BW gain) decreased (P < 0.01) concomitantly. Backfat thickness decreased quadratically (P < 0.01) as dietary wormwood silage addition increased, whereas carcass weight (P = 0.002), longissimus muscle area (P = 0.002), and marbling score (P = 0.014) increased. Meat color was not affected by treatment. Concentrations of C18:0 (P < 0.05), C18:1 n-9 (P < 0.05) and monounsaturated fatty acid in the longissimus muscle decreased linearly (P < 0.01) with increasing wormwood silage addition but cis-9 trans-11 conjugated liloneic acid (P < 0.001), C18:3 n-3 (P < 0.01), C22:0 (P < 0.001), C24:1 n-9 (P < 0.001) and polyunsaturated fatty acid (P < 0.001) concentrations increased. Replacing rice straw with up to 100 g/kg of wormwood silage improved the growth performance, carcass quality, and muscle fatty acid profile of Hanwoo steers during the fattening period
机译：这项研究旨在确定用稻草代替艾草青蒿对肥育期韩宇公牛生长性能，car体品质和肌肉脂肪酸谱的影响。通过体重限制20头牛（326公斤或23公斤体重），并随机分配到四种处理中的一种，其中以0、50、100或150 g / kg稻草（以干物质（DM）为基础）替代与艾草青贮。在增肥的早期和后期，分别使用含有粗蛋白和120 g / kg DM和6.5 MJ / kg DM和122 g / kg DM和9.6 MJ / kg DM的可代谢能量值的浓缩饲料混合物。分别喂饲草料和精饲料混合物390天，并通过每月增加精矿比例将草料与精饲料混合物的比例从最初的7：3（以DM为基准）更改为最终的1：9。蒿木青贮饲料的粗蛋白和乙醚提取物浓度比稻草秸秆高，但中性洗涤剂纤维含量较低。稻草中的C18：2 n-6和C18：3 n-3浓度低于艾草青贮饲料中的浓度（分别为15 vs. 29 g / 100 g脂肪酸; 3 vs. 21 g / 100 g脂肪酸）。线性增加艾草青贮饲料的添加水平（P <0.001），增加了精矿和DM的总摄入量，并且使最终体重（P <0.01）和平均日增重（P <0.001）二次增加，因此，饲料转化率（DMI / BW增益）随之降低（P <0.01）。随着饲料艾草青贮饲料添加量的增加，背脂厚度呈二次下降趋势（P <0.01），而cas体重量（P = 0.002），背最长肌面积（P = 0.002）和大理石花纹得分（P = 0.014）增加。肉色不受治疗的影响。随着艾草青贮饲料的添加，长曲肌中C18：0（P <0.05），C18：1 n-9（P <0.05）和单不饱和脂肪酸的浓度线性降低（P <0.01），但顺式9反式11缀合柠檬酸（P <0.001），C18：3 n-3（P <0.01），C22：0（P <0.001），C24：1 n-9（P <0.001）和多不饱和脂肪酸（P <0.001）浓度增加。在育肥期间，用最高100 g / kg的艾草青贮饲料代替稻草可改善Hanwoo ste牛皮的生长性能，car体质量和肌肉脂肪酸分布

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