Jefferson Gandra Articles List

List of Articles Jefferson Gandra

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1 - Probiotics Improve Productive Performance and Carcass Ultrasonographic Quality of Steers under Grazing during Dry-Water Transition Season
N.F. Neves C.A. Pedrini E.R. Oliveira O.F.C. Marques J.T. Silva R.A.S. Becker W.S. Gouvea A.R.M. Fernandes J.R. Gandra
20.1001.1.2251628.2021.11.1.4.6

The aim of this study was to evaluate the probiotic effect on productive performance and carcass ultrasonographic quality of cross-bred steers. Ninety-four cross-breed steers with initial BW of 208.53 ± 23.56 kg were used, and distributed in a completely randomiz More

The aim of this study was to evaluate the probiotic effect on productive performance and carcass ultrasonographic quality of cross-bred steers. Ninety-four cross-breed steers with initial BW of 208.53 ± 23.56 kg were used, and distributed in a completely randomized design composed of 2 nutritional treatments, monensin and probiotic. The animals were weighed every 30 days, evaluated for productive performance and submitted to ultrasound evaluation of the carcass at the end of the experiment to verify development of the longissimus muscle area (LMA), subcutaneous back fat thickness in the longissimus dorsimuscle. The daily weight gain was greater in the group that received probiotics. Feed intake did not differ between groups. The animals that received probiotics obtained LMA and back fat thickness greater than the treatment with monensin. It can be concluded that the probiotic used in this trial provides improvements in the productive performance, helps in the digestibility of the fiber and improves the evaluated carcass characteristics. Manuscript profile
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2 - Intake, Digestibility, and Rumen Metabolism of Feedlot Lambs Supplemented either Monensin or Increasing Doses of Copaiba (Copaifera spp.) Essential oil
E.R. Oliveira F.S.S. Abreu A.M.A. Gabriel O.F.C. Marques J.T. Silva N.F. Neves H.F. Durães E.R.S. Gandra J.R. Gandra
20.1001.1.2251628.2022.12.1.10.9

This trial aimed to evaluate increasing levels of copaiba oil on dry matter intake and digestibility, rumen fermentation, microbial protein synthesis, and thermal regulation in lambs. Ten lambs (32.4±2.86 kg body weight and 6.1±0.4 months of age) were assi More

This trial aimed to evaluate increasing levels of copaiba oil on dry matter intake and digestibility, rumen fermentation, microbial protein synthesis, and thermal regulation in lambs. Ten lambs (32.4±2.86 kg body weight and 6.1±0.4 months of age) were assigned to two concurrent 5 × 5 latin square design trials, in which the following treatments were randomly distributed to lambs: control (CON), a basal diet with no feed additives; basal diet plus monensin (MON, 25 mg/ kg dry matter (DM)); and the basal diet pluscopaiba oil (CO), added at 0.5, 1.0, and 1.5 g/kg DM. The supplementation of copaiba oil (CO) did not influence the intake and digestibility of dry matter and nutrients. A quadratic effect was observed for the concentrations of propionate for lambs supplemented with CO. Lambs fed 1.0 g/kg DM of CO had a higher concentration of purine derivatives and microbial nitrogen and protein compared to lambs fed the ionophore. Copaiba oil (CO) positively influenced rumen fermentation and microbial protein synthesis, without altering dry matter consumption and digestibility. From these results, we suggest the use of 1.0 g/kg DM in growing lambs’ diets. Manuscript profile
Open Access Article
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3 - Live Yeast Supplementation for Heifers (F1 Angus × Nellore) in Intensive Grazing Finishing System
C.A. Pedrini J.R. Gandra E.R. Oliveira A.R.M. Fernandes F.S. Machado E.R.S. Gandra
20.1001.1.2251628.2023.13.3.7.7

The objective of the experiment was to evaluate the weight gain, digestibility and carcass quality characteristics of heifers supplemented with live yeast, in an intensive finishing system on grassland. The work carried out at a commercial farm, lasted 60 days. Sixty-tw More

The objective of the experiment was to evaluate the weight gain, digestibility and carcass quality characteristics of heifers supplemented with live yeast, in an intensive finishing system on grassland. The work carried out at a commercial farm, lasted 60 days. Sixty-two crossbred heifers (F1 Nellore×Angus): 13 ± 1.5 months, body weight of 404.85 ± 18.77 kg was allocated to two dietary treatments on bread grass (Brachiaria brizantha) cv. Marandu grassland. The dietary treatments were: control diet (CON) without the inclusion of live yeast and a diet supplemented with live yeast (LY) at the level of 15 g/day. The diets were formulated and adjusted according to daily weight gain for beef cattle, with an intake of 1.2% body weight. The protein values of the grassland areas grazed by the C and LY heifers were observed as 5.08% and 6.75%, respectively. The LY heifers consumed less diet (4.46 vs. 5.31 kg) and had a higher performance (438.5 vs. 431.2 kg) compared to the C heifers. Also, the studied carcass parameters, the digestibility of dietary starch and providing improvement in rumen health in the LY treatment were higher than those in the CON treatment. In conclusion, the dietary LY enhanced growth performance and carcass traits of crossbred (Nellore/Angus) heifers, which are likely linked with improvement in the rumen health and the starch digestibility of the diet in an intensive finishing system on grassland. Manuscript profile
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4 - Effect of Amylolytic and Cellulolytic Enzymes on Whole Plant Corn Silage: Characteristics of Silage and Animal Digestion
J.R. Gandra A.T. Nunes E.R. Oliveira M.S.J. Silva C.A. Pedrini F.S. Machado E.R.S. Gandra P.V.C. Mendes A.G.S. Pause
20.1001.1.2251628.2022.12.4.8.3

The aim of this study was to evaluate effects of adding exogenous enzymes to silage on fermentative losses and profile, aerobic stability, chemical composition, in vitro degradation, microbial quality, and nutrients intake and digestibility. Treatments were control (CON More

The aim of this study was to evaluate effects of adding exogenous enzymes to silage on fermentative losses and profile, aerobic stability, chemical composition, in vitro degradation, microbial quality, and nutrients intake and digestibility. Treatments were control (CON); addition of exo-1,4-α-glycosidase glucoamylase (GLU); addition of β-glucan 4-glucanhydrolase (CEL); and GLU + CEL. CEL increased (P≤0.038) gas losses and effluents production, CEL and GLU decreased (P=0.039) DM recovery compared to control but not differ from GLU + CEL. CEL silage had higher (P≤0.021) starch and crude protein and in vitro digestibility of dry matter (DM) and neutral detergent fiber (NDF) (P≤0.032), while GLU had higher (P=0.001) acid detergent fiber (ADF). CEL showed lower (P=0.012) ethanol content and higher (P=0.02) anaerobic bacteria counts, while GLU showed higher (P=0.012) lactate concentration and lower (P≤0.002) counts of bacteria and fungi. Lambs fed with CEL presented higher (P≤0.012) digestibility coefficients for DM, organic matter (OM), crude protein (CP) and NDF. Decrease on DM recovery indicates no improvements on the nutritive value of silage. On the other hand, cellulolytic enzyme positively affected animal digestion. Manuscript profile

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List of Articles Jefferson Gandra