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发芽大麦作为生长羔羊饲料的营养价值和消化率评估:体内和体外研究

Evaluation of the Nutritive Value and Digestibility of Sprouted Barley as Feed for Growing Lambs: In Vivo and In Vitro Studies.

作者信息

Al-Baadani Hani H, Alowaimer Abdullah N, Al-Badwi Mohammed A, Abdelrahman Mutassim M, Soufan Walid H, Alhidary Ibrahim A

机构信息

Department of Animal Production, College of Food and Agriculture Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.

Department of Plant Production, College of Food and Agriculture Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.

出版信息

Animals (Basel). 2022 May 7;12(9):1206. doi: 10.3390/ani12091206.

Abstract

The main objective of this study was to investigate the effects of freshly sprouted barley on the growth of lambs, in addition to its nutritional value and digestibility. In addition, sprouted barley digestibility and rumen fermentation were studied in vitro on a dry matter (DM) basis. A total of 45 three-month-old Awassi lambs were randomly assigned to five treatments of sprouted barley (0, 25, 50, 75, 100%) diets. Bodyweight, weight gain, feed intake and feed efficiency were recorded every two weeks. Nutrient analyses were performed on feed, faecal, and urine samples. DM and non-fibrous carbohydrates were measured. Digestibility of DM, organic matter (OM), and neutral detergent fiber (NDF), as well as gas production, pH value, ammonia-N, and volatile fatty acids (VFAs), were determined in vitro using continuous culture. The results showed that final bodyweight was lower (p < 0.05), while feed intake and the feed-to-gain ratio were increased (p < 0.05) in sprouted barley treatments. Nutrient analysis indicators of sprouted barley treatments (25 to100%) were lower (p < 0.05) for DM, crude protein, acid detergent fiber, lignin and ash, and higher for total digestible nutrients, NDF, fat, phosphorus, zinc, copper, and net energy than the traditional diet. In the in vivo study, the digestibility of nutrients in sprouted barley treatments was improved (p < 0.05), while the diet (sprouted barley 100%) had the lowest digestibility of DM, OM, and NDF compared with the other treatments in the in vitro study. In conclusion, the addition of sprouted barley improved digestibility, and fermentation characteristics, while having a negative effect on growth. Further studies are recommended for optimal growth performance.

摘要

本研究的主要目的是除了研究新鲜发芽大麦的营养价值和消化率外,还要探究其对羔羊生长的影响。此外,还在体外以干物质(DM)为基础研究了发芽大麦的消化率和瘤胃发酵。总共45只三个月大的阿瓦西羔羊被随机分配到五种发芽大麦(0%、25%、50%、75%、100%)日粮处理组。每两周记录一次体重、体重增加、采食量和饲料效率。对饲料、粪便和尿液样本进行营养成分分析。测定干物质和非纤维碳水化合物含量。采用连续培养法在体外测定干物质(DM)、有机物(OM)和中性洗涤纤维(NDF)的消化率,以及产气量、pH值、氨氮和挥发性脂肪酸(VFA)。结果表明,在发芽大麦处理组中,最终体重较低(p<0.05),而采食量和料重比增加(p<0.05)。发芽大麦处理组(25%至100%)的营养成分分析指标中,DM、粗蛋白、酸性洗涤纤维、木质素和灰分较低(p<0.05),而总可消化养分、NDF、脂肪、磷、锌、铜和净能高于传统日粮。在体内研究中,发芽大麦处理组的养分消化率有所提高(p<0.05),而在体外研究中,与其他处理相比,日粮(100%发芽大麦)的DM、OM和NDF消化率最低。总之,添加发芽大麦提高了消化率和发酵特性,但对生长有负面影响。建议进一步研究以实现最佳生长性能。

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