Economic viability of bulls finished in feedlot fed with different levels of cottonseed in diets prepared with agro-industrial byproducts

Abstract

Evaluated the economic viability of different levels of inclusion of cottonseed - COS (0%, 10%, 20%, 30%) on feed for bulls finshed in feedlot. The diets containing 85% concentrate (soybean hulls - SOH, soybean meal SOM) and 15% rouglage (sugar cane bagasse, sugar-hydrolyzed - SHY). Were used 32 Nelore bulls with a mean age of 36 months and body weight (BW) initial mean of 424 ± 25 kg for 90 days. We used a completely randomized design. Data on average daily gain (ADG) of different treatments were submitted to analysis of variance and were tested by means of regression analysis considering 5% significance level. The different levels of COS did not change (p> 0.05) ADG of bulls finished in a feedlot. The, difference in the value obtained to revenues total to carcass of $ 50.60 between levels 0% and 30% of COS and $ 44.16 to level 0% and 30% Of COS. It was found that bulls fed the 30% level with COS showed a variation of 75% more in revenue (R$) kg-1 carcass compared to 0% level with COS, or a difference of $ 0.58 kg-1 of carcass between these levels, respectively, generating a difference of $ 5,623.80 between amount of monthly net income for the 0% level of COS ($ 941.37) and for the 30% level COS (6,565.17). The ration with 30% of COS showed a cost of R$ 0.08 lower than the diet with 0% of COS. Therefore the use of up to 30% of COS in the feeding of bulls keeps ADG and can generate a net revenue month-1 greater than 85% compared to diets without cottonseed.