{"title":"Productive performance, rumen parameters, carcass quality, antioxidant profile and methane emission in lambs supplemented with triticale hay.","authors":"G A Izadi, Y Rouzbehan, J Rezaei, M J Abarghuei","doi":"10.1016/j.vas.2024.100417","DOIUrl":null,"url":null,"abstract":"<p><p>This study aims to measure the effects of different dietary concentrations of triticale hay (TH) on productive performance, carcass characteristics, microbial protein synthesis (MPS), ruminal and blood variables, and antioxidant power in 40 fattening male Gray Shirazi lambs (BW of 33.2 ± 1.1 kg) over 81 days in a completely randomized design (10 animals/diet). Four levels of TH (0.00, 13.30, 26.50, and 40.00 g/100 g dry matter; DM) were included in the diet, instead of alfalfa hay + barley straw. Dietary inclusion of TH decreased DM and nutrient intakes, but increased phenolic and flavonoid intakes, and digestibility of DM and nutrients (L, <i>P</i> < 0.01). Feeding TH did not affect daily gain, feed conversion ratio, carcass weight, dressing percentage, and <i>Longissimus</i> muscle area, decreased (L, <i>P</i> < 0.05) fat-tail, total carcass fat, and carcass stearic acid but increased (L, <i>P</i> < 0.05) lean-to-total carcass fat ratio, carcass oleic acid, polyunsaturated fatty acids (FA), and antioxidant power. Dietary TH increased ruminal MPS and cellulolytic bacteria but decreased ammonia-N, protozoa, and <i>in vitro</i> methane production (L, <i>P</i> < 0.01). Nitrogen retention and rumen short-chain FA were not affected by TH addition. Increasing dietary TH levels lowered (L, <i>P</i> < 0.01) blood cholesterol, triglyceride, and urea-N, but did not affect glucose, total protein, albumin, globulin, nitrate, and nitrite. Overall, TH can be included, up to 40 % of DM in the diet of fattening lambs, without effects on performance, to improve carcass quality, FA composition, and antioxidant capacity and reduce ruminal methane production.</p>","PeriodicalId":37152,"journal":{"name":"Veterinary and Animal Science","volume":"27 ","pages":"100417"},"PeriodicalIF":1.9000,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11733181/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Veterinary and Animal Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.vas.2024.100417","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
This study aims to measure the effects of different dietary concentrations of triticale hay (TH) on productive performance, carcass characteristics, microbial protein synthesis (MPS), ruminal and blood variables, and antioxidant power in 40 fattening male Gray Shirazi lambs (BW of 33.2 ± 1.1 kg) over 81 days in a completely randomized design (10 animals/diet). Four levels of TH (0.00, 13.30, 26.50, and 40.00 g/100 g dry matter; DM) were included in the diet, instead of alfalfa hay + barley straw. Dietary inclusion of TH decreased DM and nutrient intakes, but increased phenolic and flavonoid intakes, and digestibility of DM and nutrients (L, P < 0.01). Feeding TH did not affect daily gain, feed conversion ratio, carcass weight, dressing percentage, and Longissimus muscle area, decreased (L, P < 0.05) fat-tail, total carcass fat, and carcass stearic acid but increased (L, P < 0.05) lean-to-total carcass fat ratio, carcass oleic acid, polyunsaturated fatty acids (FA), and antioxidant power. Dietary TH increased ruminal MPS and cellulolytic bacteria but decreased ammonia-N, protozoa, and in vitro methane production (L, P < 0.01). Nitrogen retention and rumen short-chain FA were not affected by TH addition. Increasing dietary TH levels lowered (L, P < 0.01) blood cholesterol, triglyceride, and urea-N, but did not affect glucose, total protein, albumin, globulin, nitrate, and nitrite. Overall, TH can be included, up to 40 % of DM in the diet of fattening lambs, without effects on performance, to improve carcass quality, FA composition, and antioxidant capacity and reduce ruminal methane production.
本试验旨在采用完全随机设计(10只/日粮),在81 d内测定饲粮中不同浓度小黑麦干草(TH)对40只(体重33.2±1.1 kg)育肥雄性白拉子羔羊生产性能、胴体特性、微生物蛋白合成(MPS)、瘤胃和血液指标以及抗氧化能力的影响。TH 4个水平(0.00、13.30、26.50、40.00 g/100 g干物质);饲粮中不添加苜蓿干草+大麦秸秆,而添加DM)。饲粮中添加TH降低了干物质和营养物质的采食量,提高了酚类和类黄酮的采食量以及干物质和营养物质的消化率(L, P < 0.01)。饲喂TH对日增重、饲料系数、胴体重、屠宰率和最长肌面积无显著影响,可降低(L, P < 0.05)脂肪尾、胴体总脂肪和胴体硬脂酸,提高(L, P < 0.05)瘦总脂肪比、胴体油酸、多不饱和脂肪酸(FA)和抗氧化能力。饲粮中添加TH增加了瘤胃MPS和纤维素分解菌,降低了氨氮、原生动物和体外甲烷产量(L, P < 0.01)。添加TH对氮潴留和瘤胃短链FA无影响。增加饲粮TH水平可降低血胆固醇、甘油三酯和尿素氮(L, P < 0.01),但对葡萄糖、总蛋白、白蛋白、球蛋白、硝酸盐和亚硝酸盐没有影响。总体而言,在不影响生产性能的情况下,育肥羔羊日粮中可添加高达40%的干物质,以改善胴体质量、FA组成和抗氧化能力,并减少瘤胃甲烷产量。