Performance and economic analysis oftwo beefcattle genetic groups fed different nutritionalstrategies
2020
Rowberta Teixeira dos Santos | Lorena Martins Oliveira | Matheus Silva Rodrigues | Alcido Elenor Wander | Eduardo Rodrigues de Carvalho
Genetic resources and well-balanced diets are relevant for improving the performanceand profitability of beef cattle finished in feedlots. The objective of the present paper was todetermine the performance and economic analysis of36 non-castrated males (18 Nellore and 18 F1Angus × Nellore) fed diets containing either fixed or variable nutritional levels. Animals were fedadlibitumonce a day. Dry matter intake (DMI) was determined daily by the difference between feedoffered and feed refused. Body weight (BW) was recorded every two weeks after a twelve-hoursolid fasting. Data ofeconomic analysis (diet cost, feeding cost, average productivity, average cost,marginal productivity, marginal cost, total revenue, profit, and marginal revenue) were standardizedin 14-day intervals likewise BW recording. The experimental design was completely randomized ina factorial scheme 2 × 2 × 2 (two genetic groups, two diets, and two housing types). F1 Angus ×Nellore animals increased (p <0.05) DMI, BW, hot carcass weight, total revenue, and profit incomparison with Nellore animals. Conversely, Nellore had a lower (p <0.05) feeding cost andaverage cost compared with F1 Angus × Nellore. No response (p > 0.05) ofdiet (fixed or variable)was detected on performance and economic indicators; therefore the use of a variable diet is notrecommended for beef cattle feeding. F1 Angus × Nellore may be indicated in feedlot finishingsystems with a high supply of forage and dietary feeds, whereas Nellore may be recommended infeedlot finishing systems with certain limitations for forage and grain production.
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