Uso de Salinomicina e Virginiamicina na Alimentação de Bovinos de Corte à Pasto no Verão e no Inverno
Data
2013-06-21
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Universidade Federal de Goiás
Resumo
The aimed was to include virginiamycin and salinomycin to supplement beef cattle
growth in atropical grass base diet during rainy season. Experiment 1: A total of 45
animals, grouping on 15 maleNelore of the same contemporary group, in RBD
distribution; rotational grazing system handled (Panicum maximum cv. Massai).
Variables analyzed were SMC, DWG, biometric measurements, BCS and economic
assessment. Experiment 2: 6 fistulated animals were used, Nellore males of the same
contemporary group, distributed in LSD 3x3 replicated; rotational grazing system
handled (Brachiariadecumbens) from 14h to 10h hours and the MS. Variables analyzed
were MSC, rumen pH, ammonia, DM, NDF and ADF in siturumen degradability. For
both experiments, three treatmentswereconsisted: control, mineral supplement by
COMIGO - Cria61 - F2 (MS); virginiamycin: MS + virginiamycin (Phigrow ®) 100 mg /
animal / day; salinomycin: MS + salinomycin (Posistac ®) 108 mg / animal / day. The
results were analyzed by varianceanalysis and means were compared by Tukey test
(P>05). The group control showed greater MSC (P <0.05), the virginiamycin group
increased 25.4% in DWG (P <0.05), 0.583 kg / animal / day, compared to control (0.465
kg / animal / day), and 9.79% in relation to salinomycin (0.531 kg / animal / day) and
that higher than the control14.2%. There was a reduction of 18.7% in the CSM to
virginiamycin and salinomycin to 29.0% when comparing with the control. The
virginiamycin was handling better financial efficiency: 26% higher than the control and
8.6% higher than salinomycin, and this, 16% higher than the control. There was no
significant difference (P> 0.05) for MSC on rumen pH average(6.66, 6.61 and 6.56) and
ammonia concentration (4,207, 4,238 and 3,892 mg N-NH3 / dL ) respectively for
control, virginiamycin and salinomycin. The results for DM degradability and ADF,
showed no significant difference (P <0.05) for analyzed variables. There was statistical
differencesin NDF degradability (P> 0.05), virginiamycin had the highest degradability in
2 and 5% of passage rates, similar to control and greater than salinomycinin the 8% /
hourrate. The virginiamycin and salinomycin can be linked toSM, however do not
promote significant effects on ruminal pH, ammonia nitrogen values on DM e ADF
degradability. But virginiamycin promoted greater effective degradability of NDF.
The aimed was to include virginiamycin (VM) in two levels to energy-protein supplement
(EPS) for beef cattle growth on a basic diet of tropical grass in the dry season.
Experiment 1: A total of 45 animals were used, in groups of 15 maleNellore of the same
contemporary group, randomly distributed in RB; in rotational grazing system handled
(Tifton 85). Experiment 2: A total of 6 fistulatedNellore males of the same contemporary
group, distributed in LSD 3x3 replicated. Animals were handled in a rotational grazing
system (Brachiariadecumbens) in the dry season. Distributed into three treatments:
control, COMIGO Mineral Supplement - Production - F.10 protein-energy (PES); VM
100: PES + VM (Phigrow ®) 108 mg / animal / day; VM 200: PES + VM (Phigrow® )
216 mg / animal / day. Variables analyzed in in experiment 1 were PESC, DGW,
biometric measurements and BCS and in experiment 2, PESC, rumen pH, ammonia,
DM, NDF and ADF, in situ degradability. Results were analyzed by variance analysis
and means were compared by Tukey test (P>0.05). There was no difference in ADG,
PESC and biometric measurements (P <0.05), ADG for VM 200, 0,431, 0,391 and 100
VM control 0.398 kg / animal / day. There was no significant difference (P> 0.05) for
PESC, in the overall rumen pHaverage (7.02, 7.04 and 7.06) and ammonia
concentration (3,961, 3,876 and 4,147 mg N-NH3 / dL) respectively for control, VM 100
and VM 200 (P> 0.05). There was no significant difference (P <0.05) for any variables in
DM, NDF and ADF degradability analyses. Virginiamycin inclusion caused greater
supplementreduction on cattle on grazing pasture, and did not affect rumen pH, in
rumen ammonia, dry matter and neutral detergent fiber and aciddegradability values.
Descrição
Palavras-chave
Aditivos , Desempenho , Manejo nutricional , Manipuladores ruminais , Nelore , Antimicrobianos , Degradabilidade , Crescimento , Eficiência econômica , pH ruminal , N-amoniacal , Aditivos zootécnicos , Degradação da fibra , suplementação proteico - energética , Antimicrobials , Degradability , Growth , Economic efficiency , Ruminal pH , N - ammonia , Zootechnical additives , Fiber degradation , Protein-energy supplementation
Citação
FERREIRA, Sérgio Fernandes. Uso de Salinomicina e Virginiamicina na Alimentação de Bovinos de Corte à Pasto no Verão e no Inverno. 2013. 84 f. Tese (Doutorado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2013.