Mozart Alves Fonseca
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View article: Evaluation of direct-fed microbials as an alternative to ionophores and non-ionophore additives on <i>in vitro</i> ruminal fermentation, gas production kinetics, and digestibility in beef cattle’s forage-based diets
Evaluation of direct-fed microbials as an alternative to ionophores and non-ionophore additives on <i>in vitro</i> ruminal fermentation, gas production kinetics, and digestibility in beef cattle’s forage-based diets Open
Two studies were conducted to evaluate the effects of a Bacillus-based direct-fed microbial (DFM) compared to ionophores and non-ionophore additives on in vitro ruminal fermentation parameters, gas production kinetics, as well as dry matte…
View article: Slow-Release Urea Technologies: Effects on Nitrogen Utilization and Small Ruminant Performance
Slow-Release Urea Technologies: Effects on Nitrogen Utilization and Small Ruminant Performance Open
Urea is one of the most widely used sources of non-protein nitrogen (NPN) in ruminant diets due to its low cost and high availability. However, its rapid solubilization in the rumen can result in abrupt ammonia release, leading to toxicity…
View article: PSIX-25 Interaction between maternal parity and creep feeding supplementation on the productive performance and metabolism of grazing Nellore cow-calf pairs.
PSIX-25 Interaction between maternal parity and creep feeding supplementation on the productive performance and metabolism of grazing Nellore cow-calf pairs. Open
Maternal nutrient availability and body condition (BCS) during the peripartum period can influence the postpartum performance of beef cows and the growth and metabolism of their progeny. Maternal parity may also impact these responses, yet…
132 Late-Breaking: Whole-farm system comparisons of organic and conventional beef production in the Southern High Plains of United States. Open
The organic foods demands are increasing around the world. The rise of consumer interest in alternative to conventional beef, specifically associated with environmental issues, engaged producers to find alternatives such organic management…
PSXII-22 Effects of branched-chain volatile fatty acids and protein-energy supplementation on rumen fermentation and digestive kinetics in dairy × beef steers grazing native or cultivated pasture. Open
Branched-chain volatile fatty acids (BCVFA), are microbial metabolites derived from ruminal degradation of the amino acids leucine, valine, and isoleucine, including isovalerate, isobutyrate, and 2-methylbutyrate, respectively. Cellulolyti…
PSXIII-22 Impact of feed additives on in vitro dry matter and fiber digestibility of forage-based diets. Open
The inclusion of additives in energy-protein supplements (EPS) can be an important tool for improving rumen fermentation of forage-based diets. While some additives enhance fiber digestibility by stimulating cellulolytic bacteria in the ru…
PSXIII-26 Effects of a Bacillus-based probiotics, ionophores, and non-ionophore additives on in vitro gas production kinetics of forage-based diets. Open
Feed additives, including probiotics, ionophores, and non-ionophores, can modulate the rumen microbiome, animal performance and immune response. However, most research with these additives has been conducted with high concentrate diets, an…
View article: PSXIII-24 Performance and blood characteristics of beef heifers supplemented with yeast during the prepubertal period.
PSXIII-24 Performance and blood characteristics of beef heifers supplemented with yeast during the prepubertal period. Open
During the period preceding the first ovulation in heifers (prepubertal period), several physiological and metabolic changes occur which may impact reproductive efficiency. Body weight (BW) and metabolic markers such as insulin-like growth…
View article: Evaluation of natural additives on in vitro gas production kinetics and digestibility of Xaraés grass combined or not with dry fiber and solubles
Evaluation of natural additives on in vitro gas production kinetics and digestibility of Xaraés grass combined or not with dry fiber and solubles Open
This study aimed to assess the impacts of various additives on the kinetic parameters of gas production and in vitro dry matter digestibility (IVDMD) and in vitro neutral detergent fiber digestibility (IVNDFD) in substrates with high fiber…
View article: Cashew Gum (Anacardium occidentale) Hydrogel for Sustainable Irrigation of Cactus Pear: Effects on Growth, Chemical Composition, and Mineral Content
Cashew Gum (Anacardium occidentale) Hydrogel for Sustainable Irrigation of Cactus Pear: Effects on Growth, Chemical Composition, and Mineral Content Open
Hydrogels are substances designed to retain significant quantities of water and slowly release it to support plant growth. This study produced and evaluated the use of a test hydrogel (TH), a natural polymer derived from cashew gum (Anacar…
View article: Nutritional carryover effects of the previous plane of nutrition of crossbred Angus steers affects freshwater intake, animal performance, and water and feed efficiency
Nutritional carryover effects of the previous plane of nutrition of crossbred Angus steers affects freshwater intake, animal performance, and water and feed efficiency Open
This study evaluated how the backgrounding diet can affect water intake, animal performance and water and feed efficiency of steers fed finishing diets based on grains or forages. Twenty-four crossbred Angus steers (298 ± 10.2 kg) were fed…
Influence of medium chain fatty acids on selected microbes and on in vitro ruminal fermentation of air-exposed corn silage Open
Several medium chain fatty acids and different chemical forms of these acids were evaluated in vitro as treatments of aerobically-exposed corn silage against spoilage and pathogenic microbes and for effects on rumen fermentation. Treatment…
View article: Changes in the Fatty Acid Composition of Vegetable Oils Affect the Feeding Behavior, Feed Preference, and Thermoregulatory Responses of Sheep
Changes in the Fatty Acid Composition of Vegetable Oils Affect the Feeding Behavior, Feed Preference, and Thermoregulatory Responses of Sheep Open
This research evaluated the effects of energy supplementation on sheep’s feeding behavior, feed preference, and thermoregulatory responses using technical cashew nutshell liquid (CNSL) and different vegetable oils with different unsaturate…
PSXII-9 Effects of lauric acid- and hops-based products on select microbial populations of aerobically exposed silage Open
Air exposed silages can harbor spoilage and pathogenic microbes which can reduce the palatability, nutritive quality and microbial safety of these feedstuffs. Accordingly, effective, environmentally friendly interventions are sought to res…
View article: PSVII-24 Backgrounding carryover nutritional effects on nitrogen metabolism and water requirements onto grain or forage-fed finished cattle
PSVII-24 Backgrounding carryover nutritional effects on nitrogen metabolism and water requirements onto grain or forage-fed finished cattle Open
The objective of this study was to examine how different backgrounding and finishing systems might affect nitrogen (N) metabolism, and consequently water requirements of cattle. Further, we investigated if the previous plane of nutrition m…
View article: PSX-18 Long term implanting of finished Angus Hereford steers: examining the relationship between feed and water efficiency
PSX-18 Long term implanting of finished Angus Hereford steers: examining the relationship between feed and water efficiency Open
Herein, we investigate the effects of a long-term release trenbolone acetate and estradiol implant (200 mg and 40 mg respectively, Revalor-XS; Merck Animal Health; Summit, NJ) on implanted [IMP; n = 9, body weight (BW) = 473.13 kg ± 25.22]…
View article: Evaluating the effects of ruminal incubation and abomasal enzymatic digestion on the germination potential of Bromus tectorum
Evaluating the effects of ruminal incubation and abomasal enzymatic digestion on the germination potential of Bromus tectorum Open
Targeted grazing is a management strategy for fuel reduction and cheatgrass control in the Great Basin. However, concerns of cattle acting as endozoochorous seed dispersal agents of invasive grass species have been expressed. In vitro and …
View article: Partial replacement of soybean meal by other protein sources on nutritional characteristics of beef cattle fed a whole corn grain diet
Partial replacement of soybean meal by other protein sources on nutritional characteristics of beef cattle fed a whole corn grain diet Open
Diets composed of whole flint corn grain (WCG) without any roughage source are often used in South American countries. The primary source of protein in theses diets is soybean meal. We hypothesized that the combination of different protein…
The influence of virginiamycin on digestion and ruminal parameters under feedlot conditions Open
This experiment aimed to assess the impact of virginiamycin on in vitro gas production dynamics, rumen kinetics, and nutrient digestibility in beef steers fed a grain-based diet. Nine ruminally cannulated British-crossbred steers (596 ± 49…
View article: Establishing the relationship between wildfire smoke and performance metrics on finished beef cattle in Western Rangelands
Establishing the relationship between wildfire smoke and performance metrics on finished beef cattle in Western Rangelands Open
Identifying causal relationships is complicated. Researchers usually overlook causality behind relationships which can generate misleading associations. Herein, we carefully examine the parametric relationship and causality between wildfir…
PSX-14 Effects of Forage and Grain-Based Finishing Diets on Fatty Acid Profile of Angus Steers Backgrounded Either in a Moderate Or in a High Plane of Nutrition Open
The objective of this study was to evaluate the fatty acid profile of beef backgrounded in two planes of nutrition and finished with forage-only or corn. Steers (n = 24) weighing approximately 298.63 ± 10.19 kg were randomly backgrounded i…
View article: 310 Investigating the Relationship Between Wildfire Smoke and Performance Metrics on Beef Cattle Through Bayesian Additive Regression Trees
310 Investigating the Relationship Between Wildfire Smoke and Performance Metrics on Beef Cattle Through Bayesian Additive Regression Trees Open
Identifying causal relationships on a large-scale system is highly complicated, and when not careful, statistical theories may be violated, and biological spurious claims generated. The causality between livestock health/performance and wi…
PSIV-2 Effect of Select Nitrocompounds on Rumen Methane Inhibition and Antimicrobial Activity in Vitro Open
Ruminal methane production accounts for losses of 4 to 12% of the gross energy intake of an animal and contributes nearly 25% of U.S. emissions of this greenhouse gas. Certain short-chain nitrocompounds inhibit ruminal methane production, …
View article: 353 Evaluation of Native and Invasive Seed Germination Ability After in Situ Incubation in the Rumen for Rangeland Restoration Through Targeted Seed Supplementation
353 Evaluation of Native and Invasive Seed Germination Ability After in Situ Incubation in the Rumen for Rangeland Restoration Through Targeted Seed Supplementation Open
Changes to native plant compositions of drylands are often associated to loss of wildlife, increased frequency, and severity of wildfires; further, it complicates the grazing permits and allocation during periods of restoration. The goals …
View article: PSIV-26 Development of a Controlled Exposure Particulate and Oxidative Radical Mask for Causality Experiments Investigating Smoke Exposure on Livestock Animals
PSIV-26 Development of a Controlled Exposure Particulate and Oxidative Radical Mask for Causality Experiments Investigating Smoke Exposure on Livestock Animals Open
Understanding and mapping the specific effects of smoke inhalation on cattle performance provides strategic insights for producers and policy makers to better prepare or adjust when faced with sporadic or even seasonal reductions in air qu…
View article: PSIV-25 Investigating the Use of Cover Crop Inclusion and Preservation in Silages with Addition of Molasses, Homofermentative and Heterofermentative Bacterial Mixes
PSIV-25 Investigating the Use of Cover Crop Inclusion and Preservation in Silages with Addition of Molasses, Homofermentative and Heterofermentative Bacterial Mixes Open
The use of cover crops in agriculture has had positive effects on soil health and sustainability. In the western US, utilizing cover crops for silage production provides many of the same soil health benefits while providing forage for rumi…