Performance and economic evaluation of feedlot cattle fed sugarcane tops

• Published in: Livestock science 2019-12, Vol.230, p.103827, Article 103827
• Main Authors: Roberto, Cláudio Henrique Viana, Villela, Severino Delmar Junqueira, Leonel, Fernando de Paula, da Silva, Leandro Diego, Bastos, Pedro Henrique Fernandes, Martins, Paulo Gustavo Macedo de Almeida
• Format: Article
• Language: English
• Subjects: Costs; Finishing phase; Gross margin; Net margin; Residue; Saccharum officinarum
• ISSN: 1871-1413; 1878-0490
• DOI: 10.1016/j.livsci.2019.103827

•Sugarcane tops were evaluated as a substitute for sugarcane in feedlot diets.•Four levels of substitution were evaluated in diets containing 33% of roughage.•Performance traits of young Nellore bulls and economic parameters were assessed.•Substitution of sugarcane by sugarcane tops does not affect performance. The objective was to evaluate the productive and economic performances of 32 Nellore bulls kept in a feedlot provided with different levels of sugarcane tops as a substitute for sugarcane, in diets containing 33% of roughage. Four levels of substitution were evaluated: T0 = no addition of sugarcane tops; T33 = 33% substitution; T67 = 67% substitution; and T100 = total substitution of sugarcane by sugarcane tops. Shrunk body weight was measured at the beginning and end of the experiment. Dry matter, crude protein (CP), neutral detergent fiber (NDF), ether extract (EE) and non-fibrous carbohydrate (NFC) intakes, total body weight gain, average daily gain, and feed conversion ratio were evaluated. In addition, economic parameters (total revenue, effective operating cost, total operating cost, gross margin, and net margin) were assessed, and indexes previously reported in the literature were utilized in the determination of feedlot costs. The CP, NDF, EE, and NFC intakes were different (P  0.38) among treatments. All treatments presented a positive net margin, which represents that the utilization of any level of sugarcane tops is viable. However, the 33% substitution provided the greatest numerical net margin value. In conclusion, partial or total substitution of sugarcane by sugarcane tops in diets containing 33% of roughage does not affect the performance of feedlot young bulls; moreover, it is recommended to substitute sugarcane by sugarcane tops at 33% since, at this level, a numerical reduction of production costs and greater numerical gross and net margins are obtained when compared with other levels of substitution.