São Paulo landowners and their projects for agricultural education: Luiz de Queiroz (ESALQ / USP) in Piracicaba (1881 – 1903)

Molina, Rodrigo Sarruge; Jacomeli, Mara Regina Martins

doi:10.4025/rbhe.v16i4.810.en

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“…The RLM Corte v.3.3 software was used to evaluate the experimental diets in the ESALQ Tropicalized NRC system (Lanna et al, 2011), which included the cost of weight gain ($/@), total daily cost and feed ($/animal/day), cost per animal ($/animal), feedlot cost ($), and cost of diet ($/ton). The DM costs ($/ton) of the tested ingredients were updated according to quotations obtained from suppliers located in the state of São Paulo in 2022.…”

Section: Economic Analysismentioning

confidence: 99%

Carcass, meat quality traits, and economic analysis of Nellore bulls fed with finishing feedlot diets containing mechanically processed corn silage

Costa

Baldassini

Leal

et al. 2023

Trop Anim Health Prod

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Effects of mechanical processing (MP) of corn silage and its inclusion in feedlot diets on carcass and meat quality traits of Nellore (Bos indicus) were analyzed. Seventy-two bulls aged approximately 18 months and with an initial average body weight of 392.8 ± 22.3 kg were used. The experimental design was a 2 × 2 factorial arrangement, considering the concentrate-roughage (C:R) ratio (40:60 or 20:80), MP of silage and their interactions. After slaughter, hot carcass weight (HCW), pH, temperature, backfat thickness (BFT), and ribeye area (REA), yields of meat cuts (tenderloin, striploin, ribeye steak, neck steak, and sirloin cap), meat quality traits and economic analysis were evaluated. A lower nal pH was found in the carcasses of animals consuming diets containing MP versus unprocessed silage (pH = 5.81 versus 5.93). Carcass variables (HCW, BFT, and REA) and meat cut yields were not affected by treatments. The C:R 20:80 increased the intramuscular fat (IMF) content by approximately 1%, without affecting moisture, ash, and protein contents. Meat/fat color (L*, a* and b*) and Warner-Bratzler shear force (WBSF) were similar among treatments. The results indicated that the MP of corn silage in nishing diets can provide better carcass pH results in Nellore bulls, without negatively in uencing carcass weight, fatness and meat tenderness (WBSF). Better results on IMF content were obtained using a C:R 20:80 and lower total costs per arroba produced (3.5%), daily costs per animal/day (4.2%), and cost per ton of feeds (5.15%) were found with MP silage.

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Section: Economic Analysismentioning

confidence: 99%