03612naa a2200601 a 450000100080000000500110000800800410001902200140006002400570007410000210013124501400015226000090029252018990030165000090220065000180220965000100222765000180223765000110225565000150226665000150228165300230229665300200231965300270233965300180236665300230238465300210240765300240242865300180245265300250247070000160249570000190251170000240253070000170255470000160257170000170258770000210260470000200262570000230264570000150266870000220268370000150270570000200272070000280274070000280276870000260279670000170282270000240283970000210286370000200288470000150290470000190291977300720293821465252022-09-16       2022    bl uuuu     u00u1 u    #d  a0048-96977 ahttps://doi.org/10.1016/j.scitotenv.2022.1539822DOI1 aCONGIO, G. F. S.  aPrediction of enteric methane production and yield in dairy cattle using a Latin America and Caribbean database.h[electronic resource]  c2022  aABSTRACT: Successful mitigation efforts entail accurate estimation of on-farm emission and prediction models can be an alternative to current laborious and costly in vivo CH4 measurement techniques. This study aimed to: (1) collate a database of individual dairy cattle CH4 emission data from studies conducted in the Latin America and Caribbean (LAC) region; (2) identify key variables for predicting CH4 production (g d−1) and yield [g kg−1 of dry matter intake (DMI)]; (3) develop and cross-validate these newly-developed models; and (4) compare models' predictive ability with equations currently used to support national greenhouse gas (GHG) inventories. A total of 42 studies including 1327 individual dairy cattle records were collated. After removing outliers, the final database retained 34 studies and 610 animal records. Production and yield of CH4 were predicted by fitting mixed-effects models with a random effect of study. Evaluation of developed models and fourteen extant equations was assessed on all-data, confined, and grazing cows subsets. Feed intake was the most important predictor of CH4 production. Our best-developed CH4 production models outperformed Tier 2 equations from the Intergovernmental Panel on Climate Change (IPCC) in the all-data and grazing subsets, whereas they had similar performance for confined animals. Developed CH4 production models that include milk yield can be accurate and useful when feed intake is missing. Some extant equations had similar predictive performance to our best-developed models and can be an option for predicting CH4 production from LAC dairy cows. Extant equations were not accurate in predicting CH4 yield. The use of the newly-developed models rather than extant equations based on energy conversion factors, as applied by the IPCC, can substantially improve the accuracy of GHG inventories in LAC countries.  aDiet  aLinear models  aDieta  aGado Leiteiro  aMetano  aProdução  aRendimento  aEmpirical modeling  aEnteric methane  aEquação de previsão  aGHG inventory  aInventário de GEE  aMetano entérico  aModelagem empírica  aModelo linear  aPrediction equations1 aBANNINK, A.1 aMAYORGA, O. L.1 aRODRIGUES, J. P. P.1 aBOUGOUIN, A.1 aKEBREAD, E.1 aSILVA, R. R.1 aMAURÍCIO, R. M.1 aSILVA, S. C. DA1 aOLIVEIRA, P. P. A.1 aMUÑOZ, C.1 aPEREIRA, L. G. R.1 aGÓMEZ, C.1 aARIZA-NIETO, C.1 aRIBEIRO-FILHO, H. M. N.1 aCASTELÁN-ORTEGA, O. A.1 aROSERO-NOGUERA, J. R.1 aTIERI, M. P.1 aRODRIGUES, P. H. M.1 aMARCONDES, M. I.1 aASTIGARRAGA, L.1 aABARCA, S.1 aHRISTOV, A. N.  tScience of the Total Environmentgv. 825, n. 153982, p. 1-11, 2022.