[1] LONG R J, DING L M, SHANG Z H, et al.The yak grazing system on the
Qinghai-Tibetan plateau and its status[J].The Rangeland Journal, 2008, 30(2):241-246.

[2] TAYYAB U, WILKINSON R G, CHARLTON G L, et al.Grass silage particle size when fed with or without maize silage alters performance, reticular pH and metabolism of Holstein-Friesian dairy cows[J].Animal, 2019, 13(3):524-532.

[3] 王思飞.日粮精粗比对滩羊肉品质以及体脂和肌肉CLA调控的影响[D].硕士学位论文.银川:宁夏大学, 2018. WANG S F.Effects of dietary forage to concentrate ratio on meat quality and CLA of
Tan sheep[D].Master's Thesis.Yinchuan:Ningxia University, 2018.(in Chinese)
[4] AMAT S, MCKINNON J J, PENNER G B, et al.Effects of dietary sulfur concentration and forage-to-concentrate ratio on ruminal fermentation, sulfur metabolism, and short-chain fatty acid absorption in beef heifers[J].Journal of Animal Science, 2014, 92(2):712-723.

[5] 郝怀志, 白滨, 董俊, 等.不同精粗比日粮对肉用绵羊的生产性能影响[J].畜牧兽医杂志, 2016, 35(6):7-9, 12. HAO H Z, BAI B, DONG J, et al.Effect of different dietary forage to concentrate ratios on the growth performance of mutton sheep[J].Journal of Animal Science and Veterinary Medicine, 2016, 35(6):7-9, 12.(in Chinese)
[6] DE O. NASCIMENTO, SANTOS S A, DOS S. PINA D, et al.Effect of roughage-to-concentrate ratios combined with different preserved tropical forages on the productive performance of feedlot lambs[J].Small Ruminant Research, 2020, 182:15-21.
[7] CHEN H, WANG C J, HUASAI S, et al.Effects of dietary forage to concentrate ratio on nutrient digestibility, ruminal fermentation and rumen bacterial composition in Angus cows[J].Scientific Reports, 2021, 11(1):17023.
[8] 崔安.不同精粗比日粮对舍饲秦川肉牛甲烷产量和瘤胃发酵的影响[D].硕士学位论文.杨凌:西北农林科技大学, 2016. CUI A.The effects of different concentrate to forage ratio in
Qinchuan beef cattle mathane gas emissions and rumen fermentation[D].Master's Thesis.Yangling:Northwest A&F University, 2016.(in Chinese)
[9] 戴东文, 王书祥, 周振明, 等.不同精粗比饲粮对育肥前期牦牛生长性能、血清生化指标及瘤胃发酵参数的影响[J].动物营养学报, 2021, 33(3):1555-1564. DAI D W, WANG S X, ZHOU Z M, et al.Effects of diets with different concentrate-roughage ratios on growth performance, serum biochemical indexes and rumen fermentation parameters of yak in early stage of fattening[J].Chinese Journal of Animal Nutrition, 2021, 33(3):1555-1564.(in Chinese)
[10] 胡令浩.牦牛营养研究论文集[M].西宁:青海人民出版社, 1997. HU L H.Recent advances in yak nutrition[M].Xining:Qinghai People's Publishing House, 1997.(in Chinese)
[11] 冯仰廉, 陆治年.奶牛营养需要和饲料成分[M].3版.北京:中国农业出版社, 2007. FENG Y L, LU Z N.The nutritional requirements and feed ingredients of dairy cows[M].3rd ed.Beijing:China Agriculture Press, 2007.(in Chinese)
[12] ZHAO X H, CHEN Z D, ZHOU S, et al.Effects of daidzein on performance, serum metabolites, nutrient digestibility, and fecal bacterial community in bull calves[J].Animal Feed Science and Technology, 2017, 225:87-96.
[13] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会.饲料中水分的测定:GB/T 6435-2014[S].北京:中国标准出版社, 2014. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China.Determination of moisture in feed stuffs:GB/T 6435-2014[S].Beijing:Standards Press of China, 2014.(in Chinese)
[14] 国家市场监督管理总局, 国家标准化管理委员会.饲料中粗蛋白的测定 凯氏定氮法:GB/T 6432-2018[S].北京:中国标准出版社, 2018. State Administration for Market Regulation, Standardization Administration of the People's Republic of China.Determination of crude protein in feeds-Kjeldahl method:GB/T 6432-2018[S].Beijing:Standards Press of China, 2018.(in Chinese)
[15] 中华人民共和国国家质量监督检验检疫总局.饲料中钙的测定:GB/T 6436-2002[S].北京:中国标准出版社, 2002. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China.Determination of calcium in feed:GB/T 6436-2002[S].Beijing:Standards Press of China, 2002.(in Chinese)
[16] 中华人民共和国国家质量监督检验检疫总局.饲料中总磷的测定 分光光度法:GB/T 6437-2002[S].北京:中国标准出版社, 2002. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China.Determination of phosphorus in feed-spectphotometry:GB/T 6437-2002[S].Beijing:Standards Press of China, 2002.(in Chinese)
[17] LEE C, HRISTOV A N.Short communication:evaluation of acid-insoluble ash and indigestible neutral detergent fiber as total-tract digestibility markers in dairy cows fed corn silage-based diets[J].Journal of Dairy Science, 2013, 96(8):5295-5299.

[18] 赵金标, 宋孝明, 李忠超, 等.不同纤维原料在生长猪的有效能和营养物质表观全肠道消化率的测定[J].动物营养学报, 2021, 33(11):6114-6122. ZHAO J B, SONG X M, LI Z C, et al.Determination of available energy and nutrient apparent total tract digestibility of different fibrous ingredients in growing pigs[J].Chinese Journal of Animal Nutrition, 2021, 33(11):6114-6122.(in Chinese)
[19] 冯宗慈, 高民.通过比色测定瘤胃液氨氮含量方法的改进[J].畜牧与饲料科学, 2010(6):37. FENG Z C, GAO M.Improvement of the method of measuring ammonia N concentration of rumen liquid by colorimetric determination[J].Animal Husbandry and Feed Science, 2010(6):37.(in Chinese)
[20] 高雨飞.高精料日粮条件下烟酸对牛瘤胃微生物区系的影响[D].硕士学位论文.南昌:江西农业大学, 2016. GAO Y F.Effects of niacin on microorganism system in the rumen of cattle under high-concentrate diet[D].Master's Thesis.Nanchang:Jiangxi Agricultural University, 2016.(in Chinese)
[21] 曹庆云, 周武艺, 朱贵钊, 等.气相色谱测定羊瘤胃液中挥发性脂肪酸方法研究[J].中国饲料, 2006(24):26-28. CAO Q Y, ZHOU W Y, ZHU G Z, et al.Study on the methods of determination of volatile fatty acid in the rumen liquid of lambs by gas chromatography[J].China Feed, 2006(24):26-28.(in Chinese)
[22] 王加启.反刍动物营养学研究方法[M].北京:现代教育出版社, 2011. WANG J Q.Ruminant nutrition research method[M].Beijing:Modern Education Press, 2011.(in Chinese)
[23] 朱丰华.育肥牛的饲养与管理[J].兽医导刊, 2021(7):76. ZHU F H.Feeding and management of fattening cattle[J].Veterinary Orientation, 2021(7):76.(in Chinese)
[24] 姜南, 朱彦宾, 孙光明, 等.不同精粗比饲粮对牦牛养分表观消化率、血浆生化及抗氧化指标的影响[J].中国草食动物科学, 2021, 41(3):43-48. JIANG N, ZHU Y B, SUN G M, et al.Effects of roughage to concentrate ratio on nutrient apparent digestibility, plasma biochemical parameters and antioxidant capacity of yak[J].China Herbivore Science, 2021, 41(3):43-48.(in Chinese)
[25] 李蒋伟, 王志有, 侯生珍, 等.日粮精粗比对育肥藏羊瘤胃组织形态及微生物菌群的影响[J].草业学报, 2021, 30(3):100-109. LI J W, WANG Z Y, HOU S Z, et al.Effects of dietary concentrate:roughage ratio on rumen morphology and microbial flora in fattening Tibetan sheep[J].Acta Prataculturae Sinica, 2021, 30(3):100-109.(in Chinese)
[26] 刘晓牧, 王中华, 李福昌, 等.精料补饲水平对绵羊饲料利用效率和氮平衡的影响[J].畜牧兽医学报, 2004, 35(3):266-269. LIU X M, WANG Z H, LI F C, et al.The influence of mixed concentrate supplementation level on feed conversion rate and nitrogen balance in sheep fed dry corn stalk based diets[J].Acta Veterinaria et Zootechnica Sinica, 2004, 35(3):266-269.(in Chinese)
[27] 程光民, 徐相亭, 刘洪波.饲粮精粗比对育成期杜寒杂交羊生产性能、血清生化指标及经济效益的影响[J].黑龙江畜牧兽医, 2017(1):125-127, 134. CHENG G M, XU X T, LIU H B.The effect of dietary concentrate to forage ratio on the production performance, serum biochemical indexes and economic benefits of
Duhan hybrid sheep during the breeding period[J].Heilongjiang Animal Science and Veterinary Medicine, 2017(1):125-127, 134.(in Chinese)
[28] 周汉林, 莫放, 李琼, 等.日粮中性洗涤纤维水平对中国荷斯坦公牛营养物质消化率的影响[J].海南大学学报(自然科学版), 2006, 24(3):275-283. ZHOU H L, MO F, LI Q, et al.Influence of dietary neutral detergent fiber levels on Chinese Holstein male calves' digestibility of nutrient substances[J].Natural Science Journal of Hainan University (Natural Science Edition), 2006, 24(3):275-283.(in Chinese)
[29] 徐萍, 莫放, 陈瑶, 等.日粮精料进食水平对肉牛消化道营养物质流量和表观消化率的影响[J].中国草食动物, 2007, 27(4):12-15. XU P, MO F, CHEN Y, et al.Effects of dietary concentrate intake on abomasum nutrient flows and nutrient digestibility of diets on total digestive tract in steers[J].China Herbivores, 2007, 27(4):12-15.(in Chinese)
[30] 李斌昌.日粮精粗比对不同月龄后备奶牛甲烷排放与生长性能和营养物质消化的影响[D].硕士学位论文.兰州:甘肃农业大学, 2019. LI B C.Effects of the ratios of concentrates to roughages on methane emission, growth performance and nutrient digestion of replacement heifers at different ages[D].Master's Thesis.Lanzhou:Gansu Agricultural University, 2019.(in Chinese)
[31] 李斌昌, 董利锋, 王贝, 等.日粮不同精粗比对9月龄后备奶牛甲烷排放与生长性能及营养物质消化率的影响[J].饲料工业, 2019, 40(11):12-18. LI B C, DONG L F, WANG B, et al.Effects of concentrate-to-forage ratio on methane emissions, growth performance and apparent digestibility of nutrients in 9-month-old dairy cows[J].Feed Industry, 2019, 40(11):12-18.(in Chinese)
[32] 燕文平, 张莹莹, 王聪, 等.不同精粗比日粮对肉牛生产性能和血液指标的影响[J].饲料研究, 2014(21):54-57. YAN W P, ZHANG Y Y, WANG C, et al.Effects of diets with different concentrate-to-forage ratios on production performance and blood indexes of beef cattle[J].Feed Research, 2014(21):54-57.(in Chinese)
[33] 叶尔兰·阿赛提.羊瘤胃酸中毒的病因、临床症状、诊断和综合疗法[J].现代畜牧科技, 2021(7):93-94. YEERLAN A S T.The etiology, clinical symptoms, diagnosis and comprehensive treatment of rumen acidosis in sheep[J].Modern Animal Husbandry Science & Technology, 2021(7):93-94.(in Chinese)
[34] 柏峻, 李美发, 辛均平, 等.饲粮能量水平对育肥后期锦江牛营养物质表观消化率、瘤胃发酵及血清生化指标的影响[J].动物营养学报, 2020, 32(4):1713-1720. BAI J, LI M F, XIN J P, et al.Effects of dietary energy level on nutrient apparent digestibility, rumen fermentation and serum biochemical indexes of
Jinjiang cattle in later stage of fattening[J].Chinese Journal of Animal Nutrition, 2020, 32(4):1713-1720.(in Chinese)
[35] TIAN X Z, LI J X, LUO Q Y, et al.Effects of purple corn anthocyanin on blood biochemical indexes, ruminal fluid fermentation, and rumen microbiota in goats[J].Frontiers in Veterinary Science, 2021, 8:715710.
[36] 张振宇, 梁春年, 姚喜喜, 等.日粮不同营养水平对牦牛生产性能、屠宰指标和血清生化指标的影响[J].畜牧兽医学报, 2021, 52(1):135-143. ZHANG Z Y, LIANG C N, YAO X X, et al.Effects of different nutrition levels of diets on production performance, slaughter indexes and serum biochemical indexes of yak[J].Acta Veterinaria et Zootechnica Sinica, 2021, 52(1):135-143.(in Chinese)
[37] ZHANG X, WANG H C, GUO X S.Comparative analysis of rumen fermentation parameters and bacterial profiles during adaption to different fattening stages in beef cattle fed TMR with various forage silage[J].Animal Feed Science and Technology, 2021, 278:115006.
[38] 秦正君, 王若勇, 时国峰, 等.日粮精粗比对奶牛瘤胃发酵及生产性能的影响[J].畜牧兽医杂志, 2018, 37(1):83-85. QIN Z J, WANG R Y, SHI G F, et al.Effect of dietary concentration and roughage ratio to rumen fermentation and production performance on dairy cow[J].Journal of Animal Science and Veterinary Medicine, 2018, 37(1):83-85.(in Chinese)
[39] 李伟忠, 单安山.挥发性脂肪酸在动物体内的作用[J].饲料博览, 2003(10):5-7. LI W Z, SHAN A S.Impact of volatile fatty acid in animal[J].Feed Review, 2003(10):5-7.(in Chinese)
[40] 胡丹丹.不同精粗比日粮下奶牛瘤胃发酵与菌群结构及血清生化指标变化的研究[D].硕士学位论文.银川:宁夏大学, 2019. HU D D.Study the changes of rumen fermentation, flora structure and serum biochemical parameters on dairy cows with different ratios of concentrate and roughage[D].Master's Thesis.Yinchuan:Ningxia University, 2019.(in Chinese)