Viabilidade econômica do uso de diferentes ofertas da dieta em sistemas de produção de leite de vacas F1 Holandês x Zebu

Abstract

The low availability of food during the dry period of the year, associated with the increase in production costs, restriction in the supply of the diet and the consequent drop in total milk production, has become a major challenge to keep milk producers in the activity. The use of F1 Holstein x Zebu cows proved to be promising, as they show good adaptability to adverse conditions, without affecting their productive and reproductive performance. Given the above, this study aimed to evaluate the economic viability and the impact on profitability of using different diet offerings during lactation of F1 Holstein x Zebu cows during the winter. Data from zootechnical bookkeeping and from experiments conducted in the Experimental Field of Felixlândia belonging to EPAMIG were used. The total lactation of 60 F1 Holstein x Zebu cows submitted to different feeding strategies, characterized by the offer of the diet at 2.00; 2.25; 2.50; 2.75% of body weight (BW) and a control group with at ease feeding (3.4%), allowing 5% of leftovers in relation to the dry matter supplied, distributed in a completely randomized design. The costs were raised by evaluating the different periods that characterize the lactation of an animal. The highest milk production was verified in the levels of at ease diet and 2.75% of the CP, registering smaller productions in the levels of 2.50%; 2.25%; 2.00% of the PC. The ease diet offer presented an average revenue value higher than the respective offer levels 2.75; 2.50; 2.25; 2.00% of the PC, respectively. The items profit, profitability and profitability were similar between treatments, demonstrating that a feed restriction of up to 2% of the CP, in the creation of F1 Holstein x Zebu cows, presents economic efficiency.