[1] QIN X B,LI Y E,WAN Y F,et al.Multiple stable isotopic signatures corroborate the predominance of acetoclastic methanogenesis during CH
4 formation in agricultural river networks[J]Agriculture,Ecosystems & Environment,2020,296:106930.
[2] VENEMAN J B,SAETNAN E R,CLARE A J,et al.MitiGate;an online meta-analysis database for quantification of mitigation strategies for enteric methane emissions[J].Science of the Total Environment,2016,572:1166-1174.
[3] STROHL B.Effects of natural supplements on methane production and apparent ruminal digestability utilizing a low quality forage diet:an
in vitro study[D].Master's Thesis.Illinois:Southern Illinois University at Carbondale,2016,27(10):1426-1435.
[4] JAYANEGARA A,WINA E,TAKAHASHI J.Meta-analysis on methane mitigating properties of saponin-rich sources in the rumen:influence of addition levels and plant sources[J].Asian-Australasian Journal of Animal Sciences,2014,27.
[5] 郭雪峰,刘俊峰,孙丽斌,等.甘草提取物对绵羊瘤胃体外发酵及甲烷产量的影响[J].动物营养学报,2012,24(8):1548-1556. GUO X F,LIU J F,SUN L B,et al.Effects of licorice extracts on rumen fermentation and methane yield of sheep
in vitro[J].Chinese Journal of Animal Nutrition,2012,24(8):1548-1556.(in Chinese)
[6] 王晓霞,王侃,吴晨晖,等.无患子皂甙对瘤胃发酵及甲烷产量的影响[J].中国畜牧杂志,2012,48(17):55-58. WANG X X,WANG K,WU C H,et al.The effects of sapindoside on rumen fermentation and methane production
in vitro[J].Chinese Journal of Animal Science,2012,48(17):55-58.(in Chinese)
[7] 牛俊丽,王加启,马露,等.体外法研究丝兰皂苷对瘤胃发酵参数的影响[J].家畜生态学报,2016,37(2):34-39. NIU J L,WANG J Q,MA L,et al.Effects of
Yucca schidigera on rumen fermentation parameters
in vitro[J].Acta Ecologiae Animalis Domastici,2016,37(2):34-39.(in Chinese)
[8] 王新峰,毛胜勇,朱伟云.绞股蓝皂甙对体外瘤胃微生物甲烷产量及发酵特性的影响[J].草业学报,2011,20(2):52-59. WANG X F,MAO S Y,ZHU W Y.Effects of gypenoside on
in vitro ruminal microbial methane production and fermentation characteristics[J].Acta Prataculturae Sinica,2011,20(2):52-59.(in Chinese)
[9] 姜雪,孙森凤,王悦,等.甘草药理作用研究进展[J].化工时刊,2017,31(7):25-28. JIANG X,SUN S F,WANG Y,et al.Research progress on pharmacological effects of licorice[J].Chemical Industry Times,2017,31(7):25-28.(in Chinese)
[10] 中华人民共和国农业行业标准-肉羊饲养标准(NY/T 816-2004)[J].湖南饲料,2006(6):9-15. Agricultural Industry Standard of the People's Republic of China-Meat sheep feeding standard (NY/T 816-2004)[J].Hunan Feed,2006(6):9-15.(in Chinese)
[11] MENKE K H,RAAB L,SALEWSKI A,et al.The estimation of the digestibility and metabolizable energy content of ruminant feedingstuffs from the gas production when they are incubated with rumen liquor
in vitro[J].The Journal of Agricultural Science,1979,93(1):217-222.

[12] 钱文熙,郭雪峰,张苏江.动物营养与饲料学实践教程[M].北京:中国质检出版社,2012:22-39. QIAN W X,GUO X F,ZHANG S J.Animal nutrition and feed science practice course[M].Beijing:China Quality Inspection Press,2012:22-39.(in Chinese)
[13] 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,2010,31(增刊):37. FENG Z C,GAO M.Improvement of the method of measuring ammonia nitrogen content in rumen liquid by colorimetry[J].Animal Husbandry and Feed Science,2010,31(Suppl.):37.(in Chinese)
[14] 丁学智,龙瑞军,淡瑞芳,等.瘤胃发酵液挥发性脂肪酸的气相色谱分析方法[J].甘肃农业大学学报,2006,41(2):24-26. DING X Z,LONG R J,DAN R F,et al.A determination method based on gas chromatography for analysis of volatile fatty acids in rumen fluid[J].Journal of Gansu Agricultural University,2006,41(2):24-26.(in Chinese)
[15] CERSOSIMO L M,WRIGHT A D G.Estimation methodologies for enteric methane emission in ruminants[M]//SEJIAN V,GAUGHAN J,BAUMGARD L,et al.Climate change impact on livestock:adaptation and mitigation.New Delhi:Springer,2015.
[16] 李佳腾,高旭红,张恩平.反刍动物日粮组合效应研究进展[J].家畜生态学报,2018,39(2):1-5. LI J T,GAO X H,ZAHNG E P.Study on associate effects of feeds on ruminant[J].Acta Ecologiae Animalis Domastici,2018,39(2):1-5.(in Chinese)
[17] 焦万洪,李莉.牛羊营养成分与瘤胃生态环境剖析[J].中国畜禽种业,2015,11(3):99. JIAO W H,LI L.Analysis of nutritional composition of cattle and sheep and rumen ecological environment[J].The Chinese Livestock and Poultry Breeding,2015,11(3):99.(in Chinese)
[18] HU W L,WU Y M,LIU J X,et al.Tea saponins affect
in vitro fermentation and methanogenesis in faunated and defaunated rumen fluid[J].Journal of Zhejiang University Science B,2005,6(8):787-792.
[19] 史浩亭,王加启,卜登攀,等.苏子油对瘤胃体外发酵模式、脂肪酸组成及甲烷生成的影响[J].甘肃农业大学学报,2015,50(3):23-28. SHI H T,WANG J Q,BU D P,et al.Effects of perilla seed oil supplements on rumen fermentation parameters,fatty acid compostion and methane production by a rumen-simulation technique[J].Journal of Gansu Agricultural University,2015,50(3):23-28.(in Chinese)
[20] TOMKINS N W,DENMAN S E,PILAJUN R,et al.Manipulating rumen fermentation and methanogenesis using an essential oil and monensin in beef cattle fed a tropical grass hay[J].Animal Feed Science and Technology,2015,200:25-34.
[21] 史高峰,徐静,周宝华,等.甘草酸单铵盐的制备及纯化新工艺研究[J].食品工业科技,2011,32(4):324-326. SHI G F,XU J,ZHOU B H,et al.Study on new process for the production and purification of monoammoniun glycrrhizinate[J].Science and Technology of Food Industry,2011,32(4):324-326.(in Chinese)
[22] 李洋,王明君,李仲玉,等.不同比例的湿玉米纤维饲料对奶牛瘤胃降解规律与表观消化率的影响[J].中国畜牧杂志,2015,51(7):54-59. LI Y,WANG M J,LI Z Y,et al.Effect of supplementing different rations of wet corn gluten feed on rumen degradation and nutrient digestibility in dairy cows[J].Chinese Journal of Animal Science,2015,51(7):54-59.(in Chinese)
[23] 潘龙,牛俊丽,卜登攀,等.柴胡皂苷对体外发酵参数及细菌数量变化的影响[J].草业学报,2015,24(6):85-91. PAN L,NIU J L,BU D P,et al.Effects of saikosaponin on
in vitro fermentation parameters and bacterial quantity[J].Act a Prataculturae Sinica,2015,24(6):85-91.(in Chinese)
[24] PATRA A K,STIVERSON J,YU Z.Effects of quillaja and
Yucca saponins on communities and select populations of rumen bacteria and archaea,and fermentation
in vitro[J].Journal of Applied Microbiology,2012,113(6):1329-1340.

[25] 徐晨晨,郭娉婷,刘策,等.苜蓿皂苷和酵母培养物对肉羊体外瘤胃发酵特性和甲烷产量的影响[J].动物营养学报,2019,31(9):4226-4234. XU C C,GUO P T,LIU C,et al.Effects of alfalfa saponin and yeast cultures on rumen fermentation characteristics and methane production of mutton sheep
in vitro[J].Chinese Journal of Animal Nutrition,2019,31(9):4226-4234.(in Chinese)
[26] GARCÍA-GONZÁLEZ R,GONZÁLEZ J S,LÓPEZ S.Decrease of ruminal methane production in Rusitec fermenters through the addition of plant material from rhubarb (
Rheum spp.) and alder buckthorn (
Frangula alnus)[J].Journal of Dairy Science,2010,93(8):3755-3763.

[27] 王欢莉.山羊瘤胃原虫与细菌之间氮周转规律与机制的研究[D].博士学位论文.扬州:扬州大学,2014:21-28. WANG H L.Mechanism of nitrogen turnocer between protozoa and bacteria in the rumen of goats[D].Ph.D.Thesis.Yangzhou:Yangzhou University,2014:21-28.(in Chinese)
[28] 严淑红.茶皂素对奶牛瘤胃微生物区系、瘤胃发酵及产奶性能的调控研究[D].硕士学位论文.北京:北京农学院,2016:16-19. YAN S H.Study on the regulation of tea saponin on rumen microorganisms of dairy cows, rumen fermentation and milk performance[D]Master's Thesis.Beijing:Beijing Academy of Agriculture and Forestry Sciences,2016:16-19.(in Chinese)
[29] 周文章,朱智,左福元.皂苷调控反刍动物瘤胃发酵和甲烷产量的研究进展[J].黑龙江畜牧兽医,2017(2):66-69. ZHOU W Z,ZHU Z,ZUO F Y.Saponins regulate rumen fermentation and methane production in ruminants[J].Heilongjiang Animal Science and Veterinary Medicine,2017(2):66-69.(in Chinese)
[30] LI Y F,JIN W,MU C L,et al.Indigenously associated methanogens intensified the metabolism in hydrogenosomes of anaerobic fungi with xylose as substrate[J].Journal of Basic Microbiology,2017,57(11):933-940.

[31] DOR J,POCHART P,BERNALIER A,et al.Enumeration of H
2-utilizing methanogenic archaea,acetogenic and sulfate-reducing bacteria from human feces[J].FEMS Microbiology Ecology,1995,17(4):279-284.

[32] 张婷婷.茶皂甙对瘤胃发酵、甲烷产量及毒性机理研究[D].硕士学位论文.泰安:山东农业大学,2011:4-64. ZHANG T T.Effect of tea saponin on rumen fermentation and methane production
in vitro and the toxicity of the tea saponin[D].Master's Thesis.Tai'an:Shandong Agricultural University,2011:4-64.(in Chinese)
[33] 王勇,郭成亮,辛淑荣,等.饲料中添加苜蓿皂苷提取物对肉牛生长性能、养分表观消化率及瘤胃发酵性能的影响[J].中国饲料,2020(17):76-79. WANG Y,GUO C L,XIN S R,et al.Effects of alfalfa saponin extract on growth performance,nutrient apparent digestibility and rumen fermentation performance of beef cattle[J].China Feed,2020(17):76-79.(in Chinese)
[34] CARDOZO P W,CALSAMIGLIA S,FERRET A,et al.Screening for the effects of natural plant extracts at different pH on
in vitro rumen microbial fermentation of a high-concentrate diet for beef cattle[J].Journal of Animal Science,2005,83(11):2572-2579.

[35] 刘云龙,王炳,刁其玉,等.绵羊甲烷排放规律及减排技术研究[J].饲料工业,2018,39(15):43-47. LIU Y L,WANG B,DIAO Q Y,et al.Study on the methane emission pattern and the methane inhibition methods in sheep[J].Feed Industry,2018,39(15):43-47.(in Chinese)
[36] DU Y Y,GE Y,REN Y,et al.A global strategy to mitigate the environmental impact of China's ruminant consumption boom[J].Nature Communications,2018,9(1):4133.
[37] RODRÍGUEZ R,FONDEVILA M.Effect of saponins from
Enterolobium cyclocarpum on
in vitro microbial fermentation of the tropical grass
Pennisetum purpureum[J].Journal of Animal Physiology and Animal Nutrition,2011,96(5):762-769.
[38] HESS H D,BEURET R A,LÖTSCHER M,et al.Ruminal fermentation,methanogenesis and nitrogen utilization of sheep receiving tropical grass hay-concentrate diets offered with
Sapindus saponaria fruits and
Cratylia argentea foliage[J].Animal Science,2016,79(1):177-189.