51 documents found, page 1 of 6
Predicting enteric methane production from cattle in the tropics
Ribeiro, R. S.; Rodrigues, J. P.P.; Maurício, R. M.; Borges, A. L.C.C.; Reis e Silva, R.; Berchielli, T. T. [UNESP]; Valadares Filho, S. C.Made available in DSpace on 2021-06-25T11:04:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01; Accurate estimates of methane (CH4) production by cattle in different contexts are essential to developing mitigation strategies in different regions. We aimed to: (i) compile a database of CH4 emissions from Brazilian cattle studies, (ii) evaluate prediction precision and accuracy of extant proposed eq...
In situ and in vitro estimation of mineral release from common feedstuffs fed t...
Zanetti, D.; Menezes, A. C. B.; Silva, F. A. S.; Silva, L. F. Costa e; Rotta, P. P.; Detmann, E.; Engle, T. E.; Valadares Filho, S. C.The objective of the current study was to quantify the dry matter (DM) digestibility, and total ash (TA) and mineral release from 12 concentrate and 12 forage feedstuffs commonly fed to cattle using in situ and in vitro methods. Concentrate and forage feedstuffs were incubated in the rumen of ruminally cannulated beef bulls at eight different time points. Two different trials were conducted for concentrates and...
Influence of genetic type and level of concentrate in the finishing diet on car...
Paulino, P. V. R.; Valadares Filho, S. C.; Duarte, M. S.; Benedeti, P. D. B.; Souza, N. K. P.; Lage, J. F.; Souza, E. J. O.; Cox, R. B.Carcass and meat quality traits of thirty-six feedlot beef heifers from different genetic groups (GG) fed at two concentrate levels (CL) were evaluated using 12 - Nellore (NE), 12 - ½Angus x ½Nellore (AN) and 12 - ½Simmental x ½Nellore (SN) animals. Six heifers of each GG were randomly assigned into one of two treatments: concentrate at 0.8% or 1.2% of body weight (BW). Heifers fed concentrate at 0.8% of BW had...
Levedura seca integral na alimentação de vacas lactantes
Marcondes, M. I.; Valadares Filho, S. C.; Franco, M. O.; Martins, E. C.; Rodrigues, B. M. C.; Oliveira, A. S.; Freitas, D. R.; Campos, J. M. S.Os efeitos da inclusão de levedura seca de cana-de-açúcar (Saccharomyces cerevisiae) na dieta de vacas lactantes foram avaliados com base no fornecimento de quatro dietas constituídas de diferentes níveis de substituição do farelo de soja pela levedura de cana-de-açúcar (0,00; 0,33; 0,67 e 1,00kg/kg de MS). O delineamento utilizado foi o quadrado latino 4 × 4. Não houve efeito dos tratamentos sobre o consumo de...
Castor bean meal for cattle finishing: 1—Nutritional parameters
Diniz, L. L.; Valadares Filho, S. C.; Oliveira, A. S. de; Pina, D. S.; Silva, L. D. da; Benedeti, P. B.; Baião, G. F.; Campos, J. M. S.This study was carried out to evaluate the effects of replacing soybean meal (SM) with castor bean meal supplemented (CBT) or not (CBNT) with calcium oxide on the intake, total, ruminal and intestinal apparent digestibility of dietary contituents, ruminal pH, and nitrogen ammonia concentration (NH3-N), ruminal degradation parameters, and on the ruminal microbial protein synthesis based on urinary purine derivat...
Evaluation of collection days and times to estimate urinary excretion of purine...
Silva Júnior, J. M.; Rennó, L. N.; Valadares Filho, S. C.; Paulino, M. F.; Detmann, E.; Menezes, G. C. C.; Martins, T. S.; Paula, R. M.The objectives of this study were to evaluate the effects of collection day and 4-hour collection times on the urinary excretion of creatinine, purine derivatives (PD), and nitrogen compounds in grazing Zebu cattle. Five Nellore heifers (300 ± 15.2 kg body weight [BW]) were used in a 5 × 5 Latin square design. Five treatments were tested: a mineral mixture supplied at 60 g/day (g/d) (control – CON); two treatme...
Effects of pregnancy and feeding level on carcass and meat quality traits of Ne...
Duarte, M. S.; Gionbelli, M. P.; Paulino, P. V. R.; Serão, N. V. L.; Silva, L. H. P.; Mezzomo, R.; Dodson, M. V.; Du, M.; Busboom, J. R.Carcass and meat quality traits of 16 pregnant and 5 non-pregnant cows fed at 1.2 times maintenance and 16 pregnant and 6 non-pregnant fed ad libitum were evaluated. Pregnancy did not affect final body weight (FBW; P = 0.0923), cold carcass yield (CCY; P = 0.0513), longissimus muscle area (LMA; P = 0.8260), rib fat thickness (RFT; P = 0.1873) and shear force (WBSF; P = 0.9707). A lower FBW (P = 0.0028), LMA (P ...
Desempenho produtivo de bovinos alimentados com cana-de-açúcar com diferentes n...
Valadares Filho, S. C.; Villela, S. D. J.; Salomão, B. M.; Santos, S. A.; Silva, L. F. Costa e; Rotta, P. P.Foram avaliados o consumo, as digestibilidades totais e ruminais e as taxas de digestão (kd) e de passagem (kp) ruminal dos nutrientes de dietas constituídas de cana-de-açúcar in natura e diferentes níveis de concentrado. Utilizaram-se cinco bovinos mestiços, fistulados no rúmen, com peso corporal inicial de 300±50kg, distribuídos em delineamento em quadrado latino 5x5. As dietas experimentais foram constituída...
Endogenous fraction and urinary recovery of purine derivatives in Nellore and H...
Prates, L. L.; Valadares, R. F. D.; Valadares Filho, S. C.; Detmann, E.; Santos, S. A.; Braga, J. M. S.; Pellizzoni, S. G.; Barbosa, K. S.The excretion of purine derivatives (PD) as an index of microbial biomass production in the rumen can be biased by the endogenous fraction and the incomplete urinary recovery of absorbed purines. Moreover, several authors have suggested differences for endogenous fraction of purine derivatives between genetic groups. The objective of this study was to estimate the endogenous fraction of PD and the urinary recov...
Does sugar cane ensiled with calcium oxide affect intake, digestibility, perfor...
Chizzotti, F. H. M.; Pereira, O. G.; Valadares Filho, S. C.; Chizzotti, M. L.; Rodrigues, R. T. S.; Tedeschi, L. O.; Silva, T. C.Two trials were conducted to evaluate how calcium oxide (CaO) as an additive in sugar cane silage affects animal performance and diet digestibility. Experiment 1 included 35 crossbred steers (Holstein × Nellore) with an average body weight (BW) of 350 ± 18.3 kg, which were distributed across a randomized block design with five treatments and seven replicates. The five treatments consisted of sugar cane ensiled ...