ABSTRACT An experiment on the use of Complete Rumen Modifier (CRM) to improve dairy cow productivity and to mitigate enteric methane production has been conducted. Sixteen lactating dairy cows were distributed into 4 groups by using compelete randomized design (CRD). Group I (Control) fed by basal diet consisted of elephant grass and concentrate 7.5 kg/hd/dy (CP 16% and TDN 70%), Group II (Pro. Woodii) fed by basal diet + probiotic Woodii, Group III (Pro.Noterae) fed by basal diet + probiotic Noterae; Group IV (CRM-Noterae) fed by basal diet + CRM + Pro.Noterae. Measurements were conducted on body weight gain, average daily gain, feed conversion ratio, milk and methane production. Results showed that CRM-Noterae increased ADG by 72% (1.29 vs 0.75 kg) and improved FCR (9.2 vs 15.6). Probiotic noterae as single treatment or combined with CRM increased fat and total solid content of milk from 3.18% and 10.58% in control group to become 3.91%; 11.31% and 3.55%; 11.02%, respectively. The lowest methane production was recorded in Group IV. The combination of CRM and Noterae reduced percentage of methane production by 14%. It is concluded that combination of CRM and Noterae can improve dairy cow performance and decrease methane production. Probiotic Noterae improved milk quality
