Bacharel em Zootecnia pela Faculdade de Ciências Agrárias (FCA), da Universidade Federal da Grande Dourados(UFGD). Mestranda em Produção Animal pela UFGD, linha de pesquisa" Forragicultura, Avaliação de Alimentos e Nutrição Animal".
EDUCATION
Bacharel em Zootecnia
Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados (UFGD)
2016-2021
Mestranda em Zootecnia
Programa de Pós-Graduação Zootecnia - Universidade Federal da Grande Dourados (UFGD)
2022-2024
RESEARCH INTERESTS
Mestranda na área de Zootecnia/Produção Animal, linha de pesquisa voltada a Nutrição Animal, Avaliação de Alimentos e Forragicultura.
23
Scopus Publications
Scopus Publications
Optimizing Recoverable Biomass in BRS Capiaçu: Nitrogen-Driven Structural Modulation and Consequences for Silage Conservation Jefferson R. Gandra, Cibeli A. Pedrini, Kalita P. Rosa, Wanderson L. Silva, Khivia V. S. Andrade, Jonahtan C. Melo, Jose A. Araújo, Rafael H. B. T. Goes, Mayana P. S. Costa, Caio S. Takyia, Tiago A. Del Valle New Zealand Journal of Agricultural Research, 2026 This study evaluated the effects of graded nitrogen fertilization on the morpho‐agronomic traits, nutritional composition, and silage fermentation of Cenchrus purpureus cv. BRS Capiaçu. Two experiments were conducted. In Experiment 1, a randomized complete block design with four nitrogen rates (0, 50, 100, and 150 kg N ha −1 ) was used to assess biomass yield, structural characteristics, regrowth, and nutritive value. In Experiment 2, silages produced from these treatments were evaluated for fermentation losses, dry matter recovery (DMR), aerobic stability, and nutritional quality. In Experiment 1, nitrogen fertilization promoted quadratic responses in fresh ( p = 0.045) and dry matter yield ( p = 0.039), with estimated maxima at 79.45 and 89.15 kg N ha −1 , respectively. Structural traits, including plant height ( p = 0.041), stem diameter ( p = 0.038), and tiller number ( p < 0.0001), as well as in vitro digestibility ( p = 0.004), also showed quadratic patterns, indicating optimized development at intermediate nitrogen levels. Crude protein increased linearly ( p = 0.002), whereas fiber fractions and nonfiber carbohydrates exhibited nonlinear responses, suggesting shifts in carbon–nitrogen allocation. In Experiment 2, gas losses ( p = 0.002) and silage pH ( p < 0.0001) showed quadratic responses to nitrogen supply, while effluent losses decreased ( p = 0.021) and DMR increased ( p = 0.006) linearly. Fiber fractions declined ( p < 0.0001), whereas total digestible nutrients, net energy for lactation, and in vitro digestibility increased with nitrogen fertilization ( p < 0.0001). Multivariate analysis explained 80.2% of total variation and confirmed the association between plant structural traits at harvest and silage fermentation efficiency. Overall, nitrogen fertilization modulated plant growth, composition, and conservation dynamics, with predominantly quadratic responses indicating diminishing returns at higher rates. Nitrogen application between 80 and 100 kg N ha −1 is recommended to optimize biomass production, nutritive value, and silage preservation.
Optimizing Ruminal Efficiency and Nitrogen Utilization in Beef Steers Through Live Yeast Supplementation in Intensive Pasture-Based Finishing Systems Sullyvan S. Oliveira, Rafael H. T. B. Goes, Jefferson R. Gandra, Douglas G. Anschau, Cibeli A. Pedrini, Nayara G. Silva, Raquel T. Oliveira, Fernanda N. F. Cruz, Jaqueline L. Royer New Zealand Journal of Agricultural Research, 2026 The aim of this study was to determine the influence of increasing doses of live yeast for grazing cattle on nutrient intake and total apparent digestibility, ruminal fermentation parameters, microbial protein synthesis, nitrogen utilization, urea and creatinine metabolism, and eating behavior. Five rumen‐cannulated crossbred steers 16 mo and 350 live weights, were used in a 5 × 5 Latin square experiment design of 22‐d periods, in which the last 8 days were used for data collection. Steers were randomly designated to one treatment sequence containing live yeast added at 0, 5, 10, 15, or 20 g/day. Animals were individually allocated in paddocks (0.3 ha) uniformly covered with Urochloa brizantha cv. Marandu.” A quadratic response was observed for supplement intake (16.5 g/day), organic matter intake (7.5 g/day), crude protein (CP) intake (12.34 g/day), and starch intake (11.11 g/day). The total apparent digestibility of dry matter, CP, neutral detergent fiber, and starch increased linearly with the addition of live yeast. A quadratic response was observed for propionate concentration (7.71 g/day), butyrate (6.5 g/day), and total fatty acids (5.94 g/day). A quadratic response was also observed for nitrogen intake (14.88 g/day) and fecal nitrogen excretion (8.65 g/day. Overall, live yeast supplementation enhanced ruminal fermentation and nutrient utilization in beef steers finished on intensive pasture systems, with an optimal inclusion level of approximately 10 g/day of Saccharomyces cerevisiae (2 × 10 10 CFU/g) .
Enhancing Fermentation and Nutritional Quality of Total Mixed Ration Silages: The Impact of Forage-to-Concentrate Ratio and Microbial Inoculant Inclusion Jefferson R. Gandra, Erika R. S. Gandra, Cibeli A. Pedrini, Rafael H. B. T. Goes, Euclides R. Oliveira, Caio S. Takiya, Tiago A. Del Valle, Wallison R. F. Vasconcelos, Kálita P. Rosa, Beatriz V. Ribeiro New Zealand Journal of Agricultural Research, 2026 This study aimed to determine the ideal roughage‐to‐concentrate ratio in total mixed ration (TMR) silage, with and without microbial inoculant addition, by evaluating fermentation characteristics, microbial populations, aerobic stability, nutritional composition, and dry matter (DM) loss. Sixty experimental silos (PVC, 150 mm internal diameter × 30 cm height; ≈5.3 L capacity) were used, with a packing density of 600 kg m −3 of fresh forage in a completely randomized design with a 2 × 3 factorial arrangement. Treatments consisted of two levels of bacterial (0 and 8g/ton) inoculants ( Lentilactobacillus plantarum : 4 × 10 10 CFU/g + Pediococcus acidilactici : 4 × 10 10 CFU/g) and three roughage‐to‐concentrate ratios (60:40, 50:50, and 40:60). The silos were opened after 60 days of storage. The roughage‐to‐concentrate ratio significantly affected effluent, gas, and total losses, as well as DM recovery. The addition of bacterial inoculants did not compromise aerobic stability during the evaluation period and resulted in lower pH values throughout the oxygen exposure phase compared to untreated silages. Silages treated with bacterial inoculants exhibited lower DM (604.00 vs. 538.21 g/kg), while presenting higher crude protein (CP) (158.04 vs. 182.51 g/kg). Additionally, inoculated silages showed reduced ammonia nitrogen concentrations (2.44 vs. 2.09% of total nitrogen) and increased concentrations of ethanol (0.086 vs. 0.113 g/kg DM), acetate (1.927 vs. 2.837 g/kg DM), propionate (0.021 vs. 0.037 g/kg DM), butyrate (0.030 vs. 0.045 g/kg DM), lactate (0.463 vs. 0.626 g/kg DM), and total volatile fatty acids (2.137 vs. 3.159 g/kg DM). The addition of bacterial inoculants increased anaerobic and aerobic bacterial counts while reducing fungal and mold populations. It was concluded that the 50:50 roughage‐to‐concentrate ratio, when combined with the use of a microbial inoculant, was optimal for the production of TMR silage.
Rehydrated Corn Grain Silage and Exogenous Protease: Effects on Dairy Cow Performance, Metabolism, and Starch Digestibility Jefferson R. Gandra, Rafael M. Mattos, Thais M. D. M. Soares, Cibeli A. Pedrini, Antônio C. Martinez, Euclides R. Oliveira, Erika R. S. Gandra, Wallison R. F. Vasconcelos, André C. Andrade Dairy, 2025 Twenty-four Girolando cows (107 ± 56 days in milk, milk yield 22.0 ± 10.25 kg/d, and 529 ± 103 kg body weight) were used in a completely randomized design. The cows were divided according to the following experimental diets: 1—CON (basal diet with ground dry corn) 2—RCS (diet with total replacement of ground corn by rehydrated corn grain silage) 3—RCSP (diet with total replacement of ground corn by rehydrated corn grain silage + 500 g ton−1 of CINBENZA DP100®, NOVUS International, Inc (Chesterfield, Missouri, U.S.A.). enzymatic extract of Bacillus licheniformis, protease activity 600 IU g−1). Cows fed RCS + RCSP showed higher DMI, milk yield, and better efficiency (MY/DMI) compared to animals fed CON diet. Cows fed the CON diet had higher fecal concentration, and lower total starch digestibility and milk protein content compared to animals supplemented with RCS + RCSP. Cows fed RCSP showed a 2.96% superiority in total starch digestibility compared to animals fed RCS. Animals supplemented with RCSP presented higher milk yield (17.45%) and milk fat content (13.76%) than cows fed RCS. The inclusion of protease in rehydrated corn silage improved dairy cow performance, enhancing dry matter intake, milk yield, and productive efficiency. It also increased starch digestibility and milk protein and fat content, optimizing nutrient utilization.
Feeding live or inactive yeast to primiparous Jersey cows: nutrient digestibility, rumen fermentation, and milk fatty acid profile Jefferson R. Gandra, Caio S. Takiya, Erika R. S. Gandra, Cibeli A. Pedrini, Euclides R. Oliveira, Rafael H. T. B. Goes, Fábio S. Machado, Juliane Damiane New Zealand Journal of Agricultural Research, 2025 ABSTRACT The aim of this study was to evaluate the effects of live yeast (LY) or inactive yeast (IY) on intake and apparent total‐tract digestibility of nutrients, ruminal fermentation, milk yield and composition, milk fatty acid profile, N utilisation, and microbial protein synthesis of primiparous Jersey cows. Twelve primiparous Jersey cows were employed, with an average body weight of 403 kg, a lactation period of 100 days, and average daily milk output of 14.7 kg. The experimental diets were: 1 – CON (no additives); 2 – LY (inclusion of 40 g/day of live yeast); 3 – IY (inclusion of 40 g/day of inactivated yeast wall). Cows fed LY exhibited the greatest DM intake. Cows’ intake IY had the greatest digestibility of DM, OM, and NDF. Feeding IY reduced ruminal concentrations of acetate, isobutyrate, and branched‐chain fatty acids. Cows fed either LY or IY increased the production of milk and FCM. Cows under the LY treatment had greater milk fat content. Cows fed LY had the greatest N intake. Yeast treatments also increased the absorbable purine estimation. Supplementing primiparous dairy cows with yeast products, especially live yeast, improved dry matter intake by positively influencing digestibility, particularly for starch and NDF.
Performance, Meat Quality and Meat Metabolomics Outcomes: Efficacy of 3-Nitrooxypropanol in Feedlot Beef Cattle Diets Cibeli Almeida Pedrini, Fábio Souza Machado, Alexandre Rodrigo Mendes Fernandes, Nara Regina Brandão Cônsolo, Fernanda Maria Marins Ocampos, Luiz Alberto Colnago, Alexandre Perdigão, Victor Valério de Carvalho, Tiago Sabella Acedo, Luis Fernando Monteiro Tamassia, Maik Kindermann, Jefferson Rodrigues Gandra Animals, 2024 30 Nellore animals with an average weight of 407.25 ± 2.04 kg, were distributed in a completely randomized design across the following treatments: 1—Control (without inclusion of 3-NOP); 2—BV75 (inclusion of 3-NOP at 75 mg/kg DM); 3—BV100 (inclusion of 3-NOP at 100 mg/kg DM). No significant effects were observed between treatments on ingestive behavior. However, the notable effect on the BWfinal and ADG of animals supplemented with 3-NOP compared to the control group was measurable. Cattle beef receiving 3-NOP exhibited reduced methane emissions (p < 0.0001) for all variables analyzed, resulting in an average decrease of 38.2% in methane emissions compared to the control, along with increased hydrogen emissions (g/day) (p < 0.0001). While supplementation with BV100 demonstrated lower methane emission, the performance was lower than BV75 in DMI, BWfinal, ADG, and ADG carcasses. Partial separation of metabolomics observed between groups indicated changes in meat metabolism when comparing the control group with the 3-NOP group, identifying metabolites with a variable importance projection (VIP) score > 1. In conclusion, supplementation with 3-NOP effectively reduced methane emissions and did not negatively influence animal performance.
Effect of Chemical and Microbial Additives on Fermentation Profile, Chemical Composition, and Microbial Populations of Whole-Plant Soybean Silage Jefferson Rodrigues Gandra, Caio Seiti Takiya, Tiago Antonio Del Valle, Cibeli de Almeida Pedrini, Erika Rosendo de Sena Gandra, Giovani Antônio, Euclides Reuter de Oliveira, Igor Kieling Severo, Francisco Palma Rennó Fermentation, 2024 This study evaluated the effects of two chemical additives or a microbial inoculant on chemical composition and DM losses in whole-plant soybean silage. One-hundred and twenty mini-silos were used in a completely randomized design experiment with the following treatments: water without chloride (control, CON); a microbial inoculant (INO); a chemical additive containing 35–45% formic acid (FA type); and another chemical additive containing 50–60% propionic acid (PA type). Data were analyzed using mixed models of SAS, and treatment differences were evaluated by the following orthogonal contrasts: C1 = CON vs. additives (INO + FA type + PA type); C2 = INO vs. chemical additives (FA type + PA type); and C3 = PA type vs. FA type. Silage pH and ammonia nitrogen concentration were decreased, and concentrations of lactic acid and acetic acid were increased with additives. Counts of lactic acid bacteria were higher in silages with INO than with chemical additives. DM recovery increased with FA type and PA type. Additives increased DM and CP concentrations. Silage A-fraction proportion was greater with additives. Additives, particularly FA type and PA type, improved chemical composition and fermentative profile and reduced undigestible proportions of protein in whole-plant soybean silage. Chemical additives were more effective in reducing silage DM losses than INO.
Effect of Amylolytic and Cellulolytic Enzymes on Whole Plant Corn Silage: Characteristics of Silage and Animal Digestion Iranian Journal of Applied Animal Science, 2022
Probiotics Improve Productive Performance and Carcass Ultrasonographic Quality of Steers under Grazing during Dry‐Water Transition Season Iranian Journal of Applied Animal Science, 2021
