Silagens de rações totais a base de palma forrageira e feno de capim-buffel na dieta de cabras em lactação.

Abstract

The objective was to evaluate the production and composition of milk, as well as the economic indicators of milk production of goats with total ration silages based on forage cactus and buffel grass hay. In carrying out the experimental trial, eight lactating multiparous dairy goats without a defined breed pattern, with 40 ± 2 kg of body weight, were used. Milk composition and yield data were analyzed in a 4 × 4 double Latin square, balanced according to lactation period and milk production to evaluate four diets consisting of different proportions of buffel grass hay and total rations in the form silage based on forage palm. The economic analysis was based on the calculation of the production cost, which is represented by the sum of all resources and operations used in the production process. There was a significant difference (P> 0.05) in terms of milk production and milk fat content, which followed the same behavior. The highest values were observed for goats that received the diet with 30% buffel grass hay, averages of 1.97 (kg / d) of milk and 4.23% of fat, followed by the diet with 20%, with production of 1.46 (kg/d) and 3.39% fat. The other constituents of milk did not differ (P < 0.05) between the studied diets. Food was the item that most contributed to annual production costs, ranging from 60% to 66% of total costs. In monetary values, diets with 10 and 23% needed more capital invested in food (R $ 15,273.39/year on average). Other costs and depreciation, these being common costs for the four chosen scenarios. The financial analysis indicators, evaluated at the sale price of R$ 2.13 per liter of milk, was viable for all diets proven by what was produced (milk), which influenced the increase in revenue. The profitability index is positive only for the diet with 30% inclusion of buffel grass hay, a value of 1.6 R$, while the rate of return was 60%. Diets with 30% of buffel grass hay provided an increase in milk production and changes in fat percentage. A simulation for the production of 100 goatsiras per year provided income higher than production costs, positive determinants of milk for all estimated scenarios.