[1] VAN GASTELEN S,DIJKSTRA J,BANNINK A.Are dietary strategies to mitigate enteric methane emission equally effective across dairy cattle,beef cattle,and sheep?[J].Journal of Dairy Science,2019,102(7):6109-6130.

[2] NIU M T,KEBREAB E,HRISTOV A N,et al.Prediction of enteric methane production,yield,and intensity in dairy cattle using an intercontinental database[J].Global Change Biology,2018,24(8):3368-3389.

[3] IPCC.Climate change 2014:impacts,adaptation and vulnerability.contribution of working group Ⅱ to the fifth assessment report of the intergovernmental panel on climate change[M].Cambridge:Cambridge University Press,2014.
[4] 宁启文,胡乐鸣.中国农业年鉴[M].北京:中国农业出版社,2018.
[5] 国家发展和改革委员会应对气候变化司.中华人民共和国气候变化第二次国家信息通报[M].北京:中国经济出版社,2013.
[6] JONKER A,FARRELL L,SCOBIE D,et al.Methane and carbon dioxide emissions from lactating dairy cows grazing mature ryegrass/white clover or a diverse pasture comprising ryegrass,legumes and herbs[J].Animal Production Science,2019,59(6):1063-1069.

[7] 王贝,许贵善,李斌昌,等.饲粮NDF/NFC对泌乳高峰期奶牛瘤胃甲烷排放量、营养物质表观消化率及生产性能的影响[J].中国饲料,2019(9):15-21.
[8] 王贝,李斌昌,董利锋,等.饲粮NDF/NFC对泌乳中期奶牛瘤胃甲烷排放量、营养物质表观消化率及生产性能的影响[J].饲料工业,2019,40(9):45-51.
[9] HRISTOV A N,KEBREAB E,NIU M,et al.Symposium review:uncertainties in enteric methane inventories,measurement techniques,and prediction models[J].Journal of Dairy Science,101(7):6655-6674.
[10] 周艳,许贵善,董利锋,等.不同饲养模式下饲粮非纤维性碳水化合物/中性洗涤纤维对生长期杜寒杂交母羊生长性能、营养物质表观消化率和甲烷产量的影响[J].动物营养学报,2018,30(4):1367-1376.
[11] 王贝,许贵善,李斌昌,等.饲粮NDF/NFC对泌乳后期奶牛瘤胃甲烷排放量、营养物质表观消化率及生产性能的影响[J].中国畜牧杂志,2019,55(4):120-127.
[12] 朱昊鹏,郑月,颜培实.精料补饲水平对锦江黄牛生长性能和瘤胃液理化指标的影响[J].畜牧与兽医,2017,49(3):24-29.
[13] KENNEDY E,O'DONOVAN M,DELABY L,et al.Effect of herbage allowance and concentrate supplementation on dry matter intake,milk production and energy balance of early lactating dairy cows[J].Livestock Science,2008,117(2/3):275-286.
[14] MOORBY J M,DEWHURST R J,EVANS R T,et al.Effects of dairy cow diet forage proportion on duodenal nutrient supply and urinary purine derivative excretion[J].Journal of Dairy Science,2006,89(9):3552-3562.

[15] KENDALL C,LEONARDI C,HOFFMAN P C,et al.Intake and milk production of cows fed diets that differed in dietary neutral detergent fiber and neutral detergent fiber digestibility[J].Journal of Dairy Science,2009,92(1):313-323.

[16] NRC.Nutrient requirements of dairy cattle[S].7th ed.Washington,D.C.:National Academy of Sciences,2001.
[17] ZHANG J,SHI H T,WANG Y J,et al.Effects of limit-feeding diets with different forage-to-concentrate ratios on nutrient intake,rumination,ruminal fermentation,digestibility,blood parameters and growth in Holstein heifers[J].Animal Science Journal,2017,89(3):527-536.
[18] LASCANO G J,KOCH L E,HEINRICHS A J.Precision feeding dairy heifers a high rumen-degradable protein diet with different proportions of dietary fiber and forage-to-concentrate ratios[J].Journal of Dairy Science,2016,99(9):7175-7190.

[19] HUUSKONEN A,KHALILI H,JOKI-TOKOLA E.Effects of three different concentrate proportions and rapeseed meal supplement to grass silage on animal performance of dairy-breed bulls with TMR feeding[J].Livestock Science,2007,110(1/2):154-165.
[20] VAN WYNGAARD J D V,MEESKE R,ERASMUS L J.Effect of concentrate level on enteric methane emissions,production performance,and rumen fermentation of Jersey cows grazing kikuyu-dominant pasture during summer[J].Journal of Dairy Science,2018,101(11):9954-9966.

[21] HASSANAT F,GERVAIS R,JULIEN C,et al.Replacing alfalfa silage with corn silage in dairy cows diets:effects on enteric methane production,ruminal fermentation,digestion,N balance,and milk production[J].Journal of Dairy Science,2013,96(7):4553-4567.

[22] ARNDT C,POWELL J M,AGUERRE M J,et al.Performance,digestion,nitrogen balance,and emission of manure ammonia,enteric methane,and carbon dioxide in lactating cows fed diets with varying alfalfa silage-to-corn silage ratios[J].Journal of Dairy Science,2015,98(1):418-430.

[23] CARBERRY C A,WATERS S M,KENNY D A,et al.Rumen methanogenic genotypes differ in abundance according to host residual feed intake phenotype and diet type[J].Applied and Environmental Microbiology,2013,80(2):586-594.
[24] The Agricultural and Food Research Council.Technical committee on responses to nutrients[R].Nutritive requirements of ruminant animals:energy.Rep.5.[S.l.]:CAB International,1990.
[25] MORRISON S J,MCBRIDE J,GORDON A W,et al.Methane emissions from grazing Holstein-Friesian heifers at different ages estimated using the sulfur hexafluoride tracer technique[J].Engineering,2017,3(5):753-759.

[26] JIAO H P,YAN T H,WILLS D A,et al.Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages[J].Agriculture,Ecosystems & Environment,2014,183:160-166.
[27] OMINSKI K H,BOADI D A,WITTENBERG K M,et al.Estimates of enteric methane emissions from cattle in Canada using the IPCC Tier-2 methodology[J].Canadian Journal of Animal Science,2007,87(3):459-467.

[28] YAN T,AGNEW R E,GORDON F J,et al.Prediction of methane energy output in dairy and beef cattle offered grass silage-based diets[J].Livestock Production Science,2000,64(2/3):253-263.
[29] ENGELKE S W,DA? G,DERNO M,et al.Methane prediction based on individual or groups of milk fatty acids for dairy cows fed rations with or without linseed[J].Journal of Dairy Science,2019,102(2):1788-1802.

[30] APPUHAMY J A D R N,FRANCE J,KEBREAB E.Models for predicting enteric methane emissions from dairy cows in North America,Europe,and Australia and New Zealand[J].Global Change Biology,2016,22(9):3039-3056.

[31] VELARDE-GUILLÉN J,PELLERIN D,BENCHAAR C,et al.Development of an equation to estimate the enteric methane emissions from Holstein dairy cows in Canada[J].Canadian Journal of Animal Science,2019,99(4):792-803.

[32] ELLIS J L,KEBREAB E,ODONGO N E,et al.Prediction of methane production from dairy and beef cattle[J].Journal of Dairy Science,2007,90(7):3456-3466.