RUMALATO improves milk yield in Holstein dairy cattle

A study was conducted in dairy cows to evaluate the response in milk yield when RUMALATO (based on malic acid) was included in the diet, this trial was conducted at Universidad Autonoma de Aguascalientes (Mexico), had a duration of five months, the model used was "switchback" with three periods (i.e. Control, Treatment, Control), where each cow (n = 26) was her own control, all cows was above 120 days in milk (DEL) and average production of cows was 10,000 kg/year. The feed was total mixed ration (TMR), and depending on period, RUMALATO was included to ensure intake of 40 g/cow/day. The production data of each cow were obtained with the program DairyPlan 5, based on this information from different periods, and the coefficients of McGill University was calculated milk yield projection in 305-day. The estimated yields were adjusted by covariance for individual milk production and analyzed with Statgraphics® program. The results showed that inclusion of RUMALATO tended to improve milk production (P = 0.0651) at 2.75% in second period and this improvement achieved 4.99% or 1.98 kg/cow/d in third period. It was also observed that RUMALATO has a cumulative effect, (i.e. by removing the product does not decrease the production), then their evaluation under "switchback" is inadequate, and partly explains the absence of significant differences in this study. It is concluded that the addition of RUMALATO on diet of dairy cows improves milk yield