Completed Research Projects

Part of: Ruminant nutrition

Area of Expertise:
Services:

Completed Research Projects

Completed Research Projects 

  • Mitigation strategies for methane emissions by dairy cows in Irish milk production systems
  • Nutritional strategies to reduce methane and nitrogen emissions from dairy cows
  • Development of near infrared reflectance spectroscopy (NIRS) calibrations to predict the in vivo digestibility of grass
  • Determining the greenhouse gas (GHG) footprint of dairy and beef production systems in Northern Ireland and the development of feeding and management strategies to mitigate emissions and optimise the environmental credentials of local agri-food produce
  • Agricultural GHG Inventory Research Consortia: Improvements to the National Inventory – Data Mining AC0114
  • Agricultural GHG Inventory Research Consortia: Improvements to the National Inventory – Methane AC0115
  • Sustainable organic and low-input dairy production (SOLID) – FP7-KBBE-2010-4

Peer-Reviewed Scientific Papers Published 

Since 2010

  • Wang, L.Z., M.L. Zhou, J.W. Wang, D. Wu and T. Yan. 2015. The effect of dietary replacement of ordinary rice with Red Yeast Rice on nutrient utilization, enteric methane emission and rumen archaeal diversity in goats. Plos One (Submitted)
  • Wang, L.Z; Z.S. Wang, B. Xue, D. Wu, T. Yan and Q.H. Peng. 2015. Comparison of rumen archaeal diversity of adult and elderly yaks (Bos grunniens) using 16S rRNA High-throughput Sequencing. Letters in Applied Microbiology (Submitted)
  • Xue, B., L. Z. Wang, Y. Li and T. Yan. 2015. Effects of cellulose on nutrient digestibility, energy utilization and methane emission by Boer crossbred goats. Small Ruminant Research (Submitted).
  • Dong L. F., T. Yan, C. P. Ferris, A.F. Carson and D.A. McDowell. 2015. Does cow genetic merit influence maintenance energy requirement and energetic efficiency in lactating Holstein-Friesian dairy cows? Journal of Dairy Science (Submitted).
  • Wang, L. Z, B. Xue and T. Yan. 2015. Greenhouse gas emissions from pig and poultry production sectors in China during the last 50 years. Animal Science Journal (Submitted)
  • Muñoz, C., D. A. Wills and T. Yan. 2015. Effects of dietary active dried yeast (Saccharomyces cerevisiae) supply at two levels of concentrate on energy and nitrogen utilization and methane emissions of lactating dairy cows. Animal Production Science (Submitted).
  • Chen, X. J. and T. Yan. 2015. Development of enteric methane emission factors for Holstein-Friesian and Norwegian first lactation cows. Acta Agriculturae Scandinavica, Section A – Animal Science (Submitted)
  • Zhao, Y.G., A. Aubry, R. Annett, N.E. O’Connell and T. Yan. 2015. Enteric methane emissions and nitrogen utilization efficiency with two genotypes of hill replacement ewes offered different types of forage. Journal of Animal Science. (Submitted)
  • Bell, M.J., P.C. Garnsworthy, R.J. Eckard, P.J. Moate, J. Craigon and T. Yan. 2015. Modelling the effect of diet composition on enteric methane emissions. Journal of Agricultural Science (Submitted)
  • Stergiadis, S., C. X. Zou, X. J. Chen, M. Allen, D. Wills and T. Yan. 2015. Equations to predict methane emissions from cows fed at maintenance energy level in pasture-based systems. Agriculture, Ecosystems & Environment (in press)
  • Zhao, Y. G., A. Aubry, N.E. O’Connell, R. Annett and T. Yan. 2015. Effects of breed, sex and concentrate supplement on digestibility, enteric methane emissions and nitrogen utilization efficiency in growing lambs offered fresh grass. Journal of Animal Science (in press).
  • Henderson, G., F. Cox, S. Ganesh, A. Jonker, W. Young, Global Rumen Census Collaborators and P. H. Janssen. 2015. Rumen microbial community composition varies with diet and host, but a core microbiome is found across a wide geographical range. Scientific Report, 5:14567; doi: 10.1038/srep14567.
  • Dong L. F., C. P. Ferris, D.A. McDowell and T. Yan, 2015. Effects of diet forage proportion on maintenance energy requirement and energetic efficiency of lactating dairy cows. Journal of Dairy Science 98:8846–8855.
  • Zhang, L.T., Huang, X.F., Xue, B., Peng, Q.H., Wang, Z.S., Yan, T., Wang, L.Z. 2015. Immunization against rumen methanogenesis by vaccination with a new recombinant protein. PLOS ONE: DOI:10.1371/journal.pone.0140086.
  • Dong L. F., T. Yan, C. P. Ferris, D.A. McDowell and A.F. Carson. 2015. Is there a relationship between genetic merit and enteric methane emission rates of lactating Holstein-Friesian dairy cows? Animal, 9:1807–1812.
  • Zou, C. X., F. J. Lively, A. R. G. Wylie, and T. Yan. 2015. Estimation of the maintenance energy requirements, methane emissions and nitrogen utilisation efficiency of two suckler cow genotypes. Animal: doi:10.1017/S1751731115002268.
  • Aubry, A. and T. Yan. 2015. Meta-analysis of calorimeter data to establish relationships between methane and carbon dioxide emissions or oxygen consumption for dairy cattle. Animal Nutrition doi:10.1016/j.aninu.2015.08.015.
  • Jiao, H.P., T. Yan, D.A. Wills, A.F. Carson and D.A. McDowell. 2015. Development of the maintenance energy requirement for young Holstein cattle from calorimeter data measured at 6, 12, 18 and 22 months of age. Livestock Science, 178: 150–157.
  • Guo, W., Li, Y., Wang, L., Wang, J., Xu, Q., Yan, T., Xue, B. 2015. Evaluation of Composition and Individual Variability of Rumen Microbiota in Yaks by 16S rRNA High-throughput Sequencing Technology. Anaerobe: 34:74-79.
  • Stergiadis, S., M. Allen, X.J. Chen and T. Yan. 2015. Prediction of nutrient digestibility and energy concentrations in fresh grass using nutrient composition. Journal of Dairy Science, Journal of Dairy Science 98:3257-3273.
  • Stergiadis, S., X.J. Chen, M. Allen, D Wills and T. Yan. 2015. Evaluating nitrogen utilization efficiency of nonpregnant dry cows offered solely fresh cut grass at maintenance levels. Journal of Animal Science 93: 709-720.
  • Dong L. F., T. Yan, C. P. Ferris and D.A. McDowell. 2015. Comparison of maintenance energy requirement and energetic efficiency between lactating Holstein-Friesian and other group of dairy cows. Journal of Dairy Science 98: 1136-1144
  • Stergiadis, S., M.M. Allen, X.J. Chen and T. Yan. 2015. Prediction of metabolisable energy concentrations using digestibility data measured with non-pregnant dry cows. British Journal of Nutrition 113: 1571-1584.
  • Muñoz, C., S. Hube, J. Morales, T. Yan and E. M. Ungerfeld. 2015. Effects of concentrate supplementation on enteric methane emissions and milk production of grazing dairy cows. Livestock Science 175:37–46
  • Jiao, H.P., T. Yan and D.A. McDowell. 2014. Prediction of manure nitrogen and organic matter excretion for young Holstein cattle fed on grass silage-based diets. Journal of Animal Science 92: 3042-3052.
  • Xue, B., L. Z. Wang and T. Yan. 2014 Methane emission inventories for enteric fermentation and manure management of yak, buffalo and dairy and beef cattle in China from 1988 to 2009. Agriculture, Ecosystems & Environment 195: 202-210.
  • Jiao, H.P., T. Yan, D.A. Wills, A.F. Carson and D.A. McDowell. 2013. Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages. Agriculture, Ecosystems & Environment 183: 160–166.
  • Chagunda, M.G.G., D. Ross, J. Rooke, T. Yan, J. L. Douglas, L. Poret, N. R. McEwan, P. Teeranavattanakul and D. J. Roberts. 2013. Measurement of enteric methane from ruminants using a hand-held laser methane detector. Acta Agriculturae Scandinavica, Section A – Animal Science, 63: 68-75.
  • McCartney, C. A., I. D. Bull, T. Yan, and R. J. Dewhurst. 2013. Assessment of archaeol as a molecular proxy for methane production in cattle. Journal of Dairy Science 96: 1211 – 1217.
  • Jiao, H, T. Yan, D. A. McDowell, A. F. Carson, C. P. Ferris and D. L. Easson. 2013. Enteric methane emissions and efficiency of utilization of energy in Holstein heifers and steers at age of six months. Journal of Animal Science 91:356-362.
  • Che, L. Q., L. M. Zhan, Z. F. Fang, Y. Lin, T. Yan and D. Wu. 2012. Effects of dietary protein sources on growth performance and immune response of weanling pigs. Livestock Science 148: 1-9.
  • Muñoz, C., Yan, T., Wills, D. A., Murray, S. and Gordon A. W. 2012. Comparison of the sulfur hexafluoride tracer and respiration chamber techniques for estimating methane emissions and correction for rectum methane output from dairy cows. Journal of Dairy Science 95: 3139-3148.
  • Strathe, A.B., J. Dijkstra, J. France, S. Lopez, T. Yan, and E. Kebreab. 2011. A Bayesian approach to analyze energy balance data from lactating dairy cows. Journal of Dairy Science 94: 2520-2531.
  • Xue, B., T. Yan, C. F. Ferris and C. S. Mayne. 2011. Milk production and energy efficiency of Holstein and Jersey-Holstein crossbred dairy cows offered diets containing grass silage. Journal of Dairy Science 94: 1455-1464.
  • Aljaloud, A. A., T.Yan and A. M. Abdukader. 2011. Development of a national methane emission inventory for domestic livestock in Saudi Arabia. Animal Feed Science and Technology 166-167: 619-627.
  • Chagunda, M.G.G. and T. Yan. 2011. Do methane measurements from a laser detector and an indirect open-circuit respiration calorimetric chamber agree sufficiently closely? Animal Feed Science and Technology 165: 8-14.
  • Qin, G. S. C. X. Zhou, C.Y. Pang, B. Z. Yang, X. W. Liang, J. X. Liu, Z. S. Xia, Q. Y. Wen and T. Yan. 2011. Evaluation of fasting metabolism of growing water buffalo (Bubalus, Bubalis). Animal Science Journal, 82: 735-740.
  • Che, L., D. Feng, D. Wu, Z. Fang, Y. Lin and T. Yan. 2011. Effect of dietary fibre on reproductive performance of sows during the first two parities. Reproduction in Domestic Animals, 46:1061-1066.
  • Lin, Y., X. F. Han, Z. F. Fang, L. Q. Che, J. Nelson, T. Yan and D. Wu. 2011. Beneficial effects of dietary fibre supplementation of a high-fat diet on fetal development in rats. British Journal of Nutrition, 106: 510-518.
  • Wang, C. H. Y. Liu, Y. M. Wang, Z. Q. Yang, J. X. Liu, Y. M. Wu, T. Yan and H.W.Ye, 2010. Effects of dietary supplementation of methionine and lysine on milk production and nitrogen utilization in dairy cows. Journal of Dairy Science 93: 3661 - 3670.
  • Yan, T., C. S. Mayne, F. G. Gordon, M. G. Porter, R. E. Agnew, D. C. Patterson and C. P. Ferris. 2010. Mitigation of enteric methane emissions through improving efficiency of energy utilization and productivity in lactating dairy cows. Journal of Dairy Science 93: 2630-2638.
  • Kebreab, E., A.B. Strathe, J. Dijkstra, J.A.N. Mills, C.K. Reynolds, L.A. Crompton, T. Yan, and J. France. 2010. Energy and protein interactions and their effect on nitrogen excretion in dairy cows. In: Crovetto, M. (ed) Energy and Protein Metabolism and Nutrition, EAAP publication No. 127, pp. 417-425.
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  • Scientific Conference Proceedings Published Since 2010
  • Hynes, D., S. Stergiadis, N.E. O’Connell and T. Yan. 2015. Effects of concentrate nitrogen levels on production performance and nutrient digestibility of lactating dairy cows fed fresh grass and concentrate diets. In: The proceedings of the Annual Meeting of British Society of Animal Science, p?, Chester, UK (Submitted).
  • Zhao, Y.G., N.E. O’Connell and T. Yan. 2015. Prediction of enteric methane emissions from sheep fed fresh perennial ryegrass (Lolium perenne) using data measured in respiration chambers. In: The proceedings of the Annual Meeting of British Society of Animal Science, p?, Chester, UK (Submitted).
  • Zhao, Y.G., N.E. O’Connell and T. Yan. 2015. Prediction of nitrogen excretion in sheep offered fresh-cut perennial ryegrass (Lolium perenne). In: The proceedings of the Annual Meeting of British Society of Animal Science, p?, Chester, UK (Submitted).
  • Jiao, H. P. and Yan, T. 2016. Modelling enteric methane emissions for Holstein heifers and steers from birth to 2 years of age. In: The proceedings of Global Farm Platform: International Conference on Steps to Sustainable Livestock, p?, Bristol, UK (in press).
  • Yan, T. 2016. Comparison of enteric methane emissions of lactating dairy cows between Holstein-Friesian and Norwegian breeds. In: The proceedings of the 6th Greenhouse Gases and Animal Agriculture, p?, Melbourne, Australia (in press).
  • Yan, T. 2015. Manipulating diet nitrogen content to reduce urine nitrogen excretion in lactating dairy cows. In: Book of Abstracts of the 66th Annual Meeting of the European Federation of Animal Science, p525, Wageningen Academic Publishers, Wageningen, The Netherlands.
  • Stergiadis, S., M. Allen, X.J. Chen, D. Wills and T. Yan. 2015. Equations to predict grass metabolisable energy in pasture-based systems. In: Book of Abstracts of the 66th Annual Meeting of the European Federation of Animal Science, p336, Wageningen Academic Publishers, Wageningen, The Netherlands.
  • Hynes, D., Stergiadis, S. and Yan, T. 2015. Reducing nitrogen output from zero-grazed lactating cows by using low-protein concentrates. Journal Veterinary Science and Technology, 6: 5 http://dx.doi.org/10.4172/2157-7579.C1.010.
  • Hynes, D., S. Stergiadis, N.E. O’Connell and T. Yan. 2015. Prediction of methane emissions from lactating dairy cows fed fresh cut grass and concentrates. In: The proceedings of the Annual Meeting of British Society of Animal Science, p145, Chester, UK.
  • Dong, L.F., C.P. Ferris, D.A. McDowell and T. Yan. 2015. The effect of dietary forage proportion on enteric methane emissions of lactating dairy cows. In: The proceedings of the Annual Meeting of British Society of Animal Science, p138, Chester, UK.
  • Stergiadis, S., M.M. Allen, X.J. Chen and T. Yan. 2015. Predicting grass digestible and metabolisable energy contents from chemical composition. In: The proceedings of the Annual Meeting of British Society of Animal Science, p111, Chester, UK.
  • Zhao, Y.G., A. Aubry, R. Annett, N.E. O’Connell and T. Yan. 2015. Prediction of nitrogen excretion in lowland lambs offered fresh grass based diets. In: The proceedings of the Annual Meeting of British Society of Animal Science, p263, Chester, UK.
  • Zhao, Y.G., A. Aubry, R. Annett, N.E. O’Connell and T. Yan. 2015. Prediction of methane emissions from lowland lambs using data measured in indirect open-circuit respiration calorimeters. In: The proceedings of the Annual Meeting of British Society of Animal Science, p142, Chester, UK.
  • Stergiadis, S. and T. Yan. 2014. Prediction of manure nitrogen output from dry cows fed freshly cut grass. In: Book of Abstracts of the 65th Annual Meeting of the European Federation of Animal Science, p415, Wageningen Academic Publishers, Wageningen, The Netherlands.
  • Dong, L. F. T. Yan, C. P. Ferris and D. A. McDowell. 2014. Effects of dietary forage proportion on energy utilisation of lactating dairy cows. In: Book of Abstracts of the 65th Annual Meeting of the European Federation of Animal Science, p394, Wageningen Academic Publishers, Wageningen, The Netherlands.
  • Hynes, D., S. Stergiadis and T. Yan. 2014. Prediction of dry matter intake by beef steers fed grass silage only diets. In: Book of Abstracts of the 65th Annual Meeting of the European Federation of Animal Science, p427, Wageningen Academic Publishers, Wageningen, The Netherlands.
  • Zou, C. X., F. J. Lively, A. R. G. Wylie and T. Yan. 2014. The effect of the suckler cow genotypes on energetic efficiency and maintenance energy requirements. In: The proceedings of the Annual Meeting of British Society of Animal Science, p125, Nottingham, UK.
  • Dong, L. F., T. Yan, C. P. Ferris and D. A. McDowell. 2014. A comparison of enteric methane emissions by Holstein-Friesian dairy cows and crossbred/Norwegian dairy cows. In: The proceedings of the Annual Meeting of British Society of Animal Science, p97, Nottingham, UK.
  • McBride, J., S. J. Morrison, T. Yan and A. W. Gordon. 2014. Relationship between enteric methane emissions, gross energy and live weight of Holstein Friesian heifers. In: The proceedings of the Annual Meeting of British Society of Animal Science, p219, Nottingham, UK.
  • McBride, J., S. J. Morrison, T. Yan and A. W. Gordon. 2014. A review of the impact of increased dietary starch concentration or addition of oils, fats tannins or saponins in the diet on enteric methane emissions. In: The proceedings of the Annual Meeting of British Society of Animal Science, p81, Nottingham, UK.
  • Aubry, A., R. Annett and T. Yan. 2014. Effects of breed and forage type on methane emission factors for replacement lowland ewes aged between 8 and 19 months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p25, Nottingham, UK.
  • Aubry, A., R. Annett, T. Yan and A. Uprichard. 2014. Effects of breed and forage type on methane emission factors for replacement hill ewes aged between 9 and 18 months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p29, Nottingham, UK.
  • Zhao, Y.G., R. Annett, A. Aubry, N.E. O’Connell and T. Yan. 2014. Effects of forage and breed types on the efficiency of utilisation of energy in hill replacement ewes. In: The proceedings of the Annual Meeting of British Society of Animal Science, p24, Nottingham, UK.
  • Zhao, Y.G., R. Annett, A. Aubry, N.E. O’Connell and T. Yan. 2014. Effects of forage and breed types on the efficiency of utilisation of nitrogen in hill replacement ewes. In: The proceedings of the Annual Meeting of British Society of Animal Science, p28, Nottingham, UK.
  • Ferris, C.P., Aubry, A., Vance, E.R., Yan, T. and Morrison, S.J. 2013. Greenhouse gas emissions from a grazing system and a confinement system involving different dairy cow genotypes. In: The Proceedings of the British Grassland Society 11th Research Conference: Science and Practice for Grass-Based Systems. Paper 1.5., Dumfries, Scotland.
  • Dong, L. F., T. Yan, C. P. Ferris, A. F. Carson and D. A. McDowell. 2013. Does cow genetic merit influence maintenance energy requirement and energetic efficiency? In: Book of Abstracts of the 64th Annual Meeting of the European Federation of Animal Science, p532, Wageningen Academic Publishers, Wageningen, the Netherland.
  • Dong, L. F., T. Yan, C. P. Ferris, A. F. Carson and D. A. McDowell. 2013. Comparison of energetic efficiency of Holstein-Friesian and other dairy cow genotypes. In: Book of Abstracts of the 64th Annual Meeting of the European Federation of Animal Science, p532, Wageningen Academic Publishers, Wageningen, the Netherland.
  • McBride, J., S. J. Morrison and T. Yan. 2013. Review of enteric methane emissions of cattle and sheep fed diets relevant to UK farming conditions. . In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p299, Dublin, Ireland.
  • Li, Y., L. Z. Wang, Xue, B. and T. Yan. 2013. Effects of dietary addition of cellulase/xylanase on enteric methane emissions in growing goats. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p309, Dublin, Ireland.
  • Aljaloud, A.A. Yan, T. and Abdukader, A. 2013. Methane emissions from enteric fermentation and manure management of high yielding dairy herds in Saudi Arabia. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p590, Dublin, Ireland.
  • Dong L., T. Yan, C. P. Ferris, A.F. Carson and D.A. McDowell. 2013. Is there a relationship between genetic merit and enteric methane emission rate of lactating Holstein dairy cows? In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p278, Dublin, Ireland.
  • Jiao, H.P., T Yan, S.J. Morrison, A.F. Carson and D.A. McDowell. 2013. Quantification of enteric methane emissions from young Holstein heifers and steers fed grass silage diets. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p356, Dublin, Ireland.
  • Zhao, Y.G., R. Annett, T. Yan and N.E. O’Connell. 2013. Effects of breed and forage type on methane emissions from hill replacement ewes. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p495, Dublin, Ireland.
  • Xue, B., L.Z. Wang and T. Yan. 2013. Temporal variation and provincial distribution of methane emissions for dairy cattle, beef cattle, buffaloes and yaks in China. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p310, Dublin, Ireland.
  • Wang L.Z., B. Xue and T. Yan. 2013. Greenhouse gas emissions from pig and poultry production sectors in China during the last 50 years. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p311, Dublin, Ireland.
  • Aubry A. and T Yan. 2013. Meta analysis of respiration calorimeter data for relationships between methane emission and carbon dioxide production or oxygen consumption for young, dry and lactating dairy cows. In: The proceedings of the 5th Greenhouse Gases and Animal Agriculture, p321, Dublin, Ireland.
  • Zhao, Y.G, A.R. McCourt, T. Yan and N.E. O’Connell. 2013. Effect of forage type on the efficiency of energy utilization in lactating dairy cows. In: The proceedings of the Annual Meeting of British Society of Animal Science, p72, Nottingham, UK.
  • Jiao, H.P., T Yan, D.A. McDowell and A.F. Carson. 2013. Development of maintenance energy requirement for young Holstein cattle using calorimeter data measured at age of 6, 12, 18 and 22 months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p66, Nottingham, UK.
  • Jiao, H.P., T Yan, D.A. McDowell and A.F. Carson. 2013. Evaluation of the efficiency of nitrogen utilisation of young Holstein cattle at age of 6 to 22 months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p57, Nottingham, UK.
  • Chagunda, M. G. G., D. Ross, J. Rooke, T. Yan and D. J. Roberts. 2012. Remote measurement of enteric methane from ruminants under different conditions using a Laser Methane Detector. In: The proceedings of the World Dairy Summit 2012 of International Dairy Federation, Abstract serial number 0138, Cape Town, South Africa.
  • McCartney, C. A., I. D. Bull, T. Yan and R. J. Dewhurst. 2012. Assessment of archaeol as a faecal marker for methane production in cattle. In: The proceedings of the 63rd Annual Meeting of European Association of Animal Production, p295, Bratislava, Slovakia.
  • Yan, T., F. J. Gordon and A. F. Carson. 2012. The effect of concentrate starch content on enteric methane emissions of lactating dairy cows. In: The proceedings of International Symposium on Emissions of Gas and Dust from Livestock, p22, Saint-Malo, France.
  • Jiao, H., T Yan, D.A. McDowell, A.F. Carson, C.P. Ferris and D. L. Easson. 2012. Measurements of enteric methane emissions from Holstein heifers and steers at age of six months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p140, Nottingham, UK.
  • Jiao, H., T Yan, D.A. McDowell, A.F. Carson, C.P. Ferris and D. L. Easson. 2012. Evaluation of the efficiency of utilisation of nitrogen for Holstein heifers and steers at age of six months. In: The proceedings of the Annual Meeting of British Society of Animal Science, p139, Nottingham, UK.
  • Munoz, C. and Yan, T. 2012. Evaluation of nitrogen utilisation efficiency of dairy cows offered diets containing two levels of concentrates with or without yeast supplementation. In The proceedings of the Annual Meeting of British Society of Animal Science, p146, Nottingham, UK.
  • Yan, T., Wills, D. and Carson, A. 2011. Development of Tier 3 enteric methane emission factors for Holstein and Norwegian dairy cows at two levels of concentrate supplementation. In: Proceedings of the 8th International Symposium on the Nutrition of Herbivores. Paper No: 167, Aberystwyth, Wales, UK.
  • Yan, T., Wills, D., Ferris, C. P and Carson, A. 2011. The impact of animal and diet factors on enteric methane conversion factor in dairy cows. In: Proceedings of the 8th International Symposium on the Nutrition of Herbivores. Paper No: 169, Aberystwyth, Wales, UK.
  • Kebreab, E., Strathe, A., Dijkstra, J., Bannink, A., Ellis, J, Yan, T. and France, J. 2011. Forage proportion of diet affects efficiency of energy utilisation for milk production in lactating dairy cows. In: Proceedings of the 8th International Symposium on the Nutrition of Herbivores. Paper No: 331, Aberystwyth, Wales, UK.
  • Jiao, H., Yan, T. and Wills, D. 2011. Relationships between stage of growth and chemical composition of grass. In The Annual Meeting of British Society of Animal Science, p183. Nottingham, UK.
  • Kebreab, E., A.B. Strathe, J. Dijkstra, J.A.N. Mills, C.K. Reynolds, L.A. Crompton, T. Yan, and J. France. 2010. Invited presentation, Energy and protein interactions and their effect on nitrogen excretion in dairy cows. In: Crovetto, M. (ed) Energy and Protein Metabolism and Nutrition, EAAP publication No. 127, pp. 417-425.
  • Wu. D., Yan, T. and Xue, B. 2010. National methane inventory for domestic livestock in China. In: The 4th International Conference on Greenhouse Gases and Animal Agriculture, page 180, Banff, Canada.
  • Aljaloud, A.A. Yan, T. and Abdukader, A. 2010. Development of national methane inventory for domestic livestock in Saudi Arabia. In: The 4th International Conference on Greenhouse Gases and Animal Agriculture, page 157, Banff, Canada.
  • Woods, V. B. and Yan, T. 2010. An inventory of methane emissions from ruminant animals in Northern Ireland due to enteric fermentation – a comparison using Tier 1 and Tier 3 emission factors. In: Proceedings of the British Society of Animal Science and the Agricultural Research Forum, page 74, Belfast, UK.
  • Munoz, C., Yan, T., Gordon, A. and Wills, D. 2010. Validation of the sulphur hexafluoride tracer technique for estimating methane emissions from dairy cows using respiration chambers: preliminary data. In: Proceedings of the British Society of Animal Science and the Agricultural Research Forum, page 256, Belfast, UK.
  • Yan, T., Woods, V. B., Morrison, S. J., Lively, F. O., Annett, R., Dawson, L. E. R. and Carson, A. 2010. Development of Tiers 2 and 3 methane emission factors for enteric fermentation and manure management of cattle and sheep using Hillsborough herd data and calorimetric methane measurements. In: Proceedings of the British Society of Animal Science and the Agricultural Research Forum, page 49, Belfast, UK.