This aimed to evaluate the economic viability of diets containing four sugar cane silages: without additive, with 1% urea, with 0.5% CaO + 0.5% urea and ; with 1% CaO. Eight crossbred cows (Holstein x Gir) were used, arranged in two 4 x 4 Latin squares compounds of the: four diets, four animals and four periods. The sugar cane used was the variety SP 79-1011, with a yield of 140 t/ha/year in the third cut. The cut of sugar cane was done manually and the cana disintegrated in stationary chopper. The production costs of the roughage, concentrated and total diet were analyzed of the according to the prices of the local market, it was also estimated the EOC (effective operational cost). The diet containing silage sugar cane with 1% urea was less efficient because low consumption and resulted in greater weight loss of cows may affect milk production and body condition score of cows during the lactation period.
additives; production cost; profitability; Saccharum officinarum