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View article: Effects of Corn Silage and Alfalfa Hay on Production and Nitrogen Excretion in Lactating Dairy Cows
Effects of Corn Silage and Alfalfa Hay on Production and Nitrogen Excretion in Lactating Dairy Cows Open
A meta-regression was conducted on studies published from 2018 to 2023 to explore the effects of nutrient intakes from alfalfa (ALF) and corn silage (CS) on milk yield (MY), energy-corrected milk yield (ECM), N efficiency (NEFF), milk urea…
View article: Predicting Chemical Body Composition Using Body Part Composition in Boer × Saanen Goats
Predicting Chemical Body Composition Using Body Part Composition in Boer × Saanen Goats Open
Two experiments were conducted to determine which part of the empty body of Boer × Saanen intact male kids can be used to predict the chemical composition of the whole body. In the first experiment, kids were fed ad libitum and slaughtered…
View article: Chemical composition and <i>in vitro</i> rumen fermentation kinetics of leaves and stems of <i>Moringa oleifera</i> and <i>Leucaena leucocephala</i> as potential feedstuffs for sheep
Chemical composition and <i>in vitro</i> rumen fermentation kinetics of leaves and stems of <i>Moringa oleifera</i> and <i>Leucaena leucocephala</i> as potential feedstuffs for sheep Open
This study aimed to evaluate the nutritive value of different vegetative parts of Moringa oleifera (leaves, stems and plant debris) and Leucaena leucocephala (leaves and dried pods after seed harvesting). Nutrient composition, secondary me…
View article: Review: Update of nutritional requirements of goats for growth and pregnancy in hot environments
Review: Update of nutritional requirements of goats for growth and pregnancy in hot environments Open
Goats play an important role in the agricultural business, providing valuable income sources through producing high-quality animal protein. They are widespread livestock for rural households due to their inherent resiliency, adaptability t…
View article: Understanding the effect of sex on energy requirements of hair sheep
Understanding the effect of sex on energy requirements of hair sheep Open
Differences and/or similarities in the influence of sex class for hair sheep requirements remain inconclusive. Knowledge of energy requirements allows well-formulated diets to be provided which is crucial for improving animal production. W…
View article: 2-Hydroxy-4-(Methylthio)-Mutanoate Supplementation Affects Production, Milk Fatty Acid Profile, and Blood Metabolites of High-Producing Holstein Cows
2-Hydroxy-4-(Methylthio)-Mutanoate Supplementation Affects Production, Milk Fatty Acid Profile, and Blood Metabolites of High-Producing Holstein Cows Open
The objectives of this study were to evaluate the effects of supplementing the diet of high-producing Holstein cows with 2-hydroxy-4-(methylthio)-butanoate (HMTBa) on their milk production and composition, milk fatty acid profile, blood me…
View article: Valine and nonessential amino acids affect bidirectional transport rates of leucine and isoleucine in bovine mammary epithelial cells
Valine and nonessential amino acids affect bidirectional transport rates of leucine and isoleucine in bovine mammary epithelial cells Open
A more complete understanding of the mechanisms controlling AA transport in mammary glands of dairy cattle will help identify solutions to increase nitrogen feeding efficiency on farms. It was hypothesized that Ala, Gln, and Gly (NEAAG), w…
View article: Graduate Student Literature Review: System, plant, and animal factors controlling dietary pasture inclusion and their impact on ration formulation for dairy cows
Graduate Student Literature Review: System, plant, and animal factors controlling dietary pasture inclusion and their impact on ration formulation for dairy cows Open
Diet formulation in a pasture-based dairy system is a challenge as the quality and quantity of available pasture, which generally constitutes the base diet, is constantly changing. The objective of this paper is to cover a more in-depth re…
View article: Modeling Gastrointestinal Tract Wet Pool Size in Small Ruminants
Modeling Gastrointestinal Tract Wet Pool Size in Small Ruminants Open
The gastrointestinal tract (GIT) wet pool size (GITwps) refers to the total amount of wet contents in GIT, which in small ruminants can reach up to 19% of their body weight (BW). This study aimed to develop models to comprehensively predic…
View article: Prediction models of reticulorumen particles and solutes passage rate in growing goats
Prediction models of reticulorumen particles and solutes passage rate in growing goats Open
The reticulorumen (RR) fractional passage rate (kp; /h) of particles and solutes plays an important role in fiber digestion, methane production, and microbial yield. However, none of the available models for predicting RR k…
View article: Associations between Dietary Fatty Acid Profile and Milk Fat Production and Fatty Acid Composition in Dairy Cows: A Meta-Analysis
Associations between Dietary Fatty Acid Profile and Milk Fat Production and Fatty Acid Composition in Dairy Cows: A Meta-Analysis Open
This meta-analysis aimed to investigate the effect of dietary fatty acid (FA) profile on milk fat production and FA profile in dairy cows. The study also aimed to develop prediction models using a meta-regression approach. The database inc…
View article: Between-individual variability on reticulorumen digesta passage rate in goats
Between-individual variability on reticulorumen digesta passage rate in goats Open
Identifying factors that influence an individual's ability to utilize nutrients is a strategy for enhancing livestock sustainability. Digesta passage rate (kp) is one of the most important determinants that influence nutrient ut…
View article: Seasonal Variation in Chemical Composition, Ruminal Fermentation, and Biological Characteristics of Paulownia shan tong: In Vitro Potential Use by Sheep and Goats
Seasonal Variation in Chemical Composition, Ruminal Fermentation, and Biological Characteristics of Paulownia shan tong: In Vitro Potential Use by Sheep and Goats Open
This study was conducted to determine the seasonal variation (two seasonal harvests during winter and spring) in some chemical and biochemical characteristics of Paulownia shan tong leaves. To achieve this, we analyzed the chemical composi…
View article: Protein requirements of hair sheep raised in warm areas: a multi-study approach
Protein requirements of hair sheep raised in warm areas: a multi-study approach Open
The protein requirements of hair sheep are a key factor in increasing profitability and decreasing the environmental impacts of nitrogen excretion. The objective of this study was to evaluate the protein requirements of hair sheep. A datab…
View article: Typology of dairy goat production systems in a semiarid region of Brazil
Typology of dairy goat production systems in a semiarid region of Brazil Open
View article: ASAS–NANP Symposium: Mathematical Modeling in Animal Nutrition: Opportunities and challenges of confined and extensive precision livestock production
ASAS–NANP Symposium: Mathematical Modeling in Animal Nutrition: Opportunities and challenges of confined and extensive precision livestock production Open
Modern animal scientists, industry, and managers have never faced a more complex world. Precision livestock technologies have altered management in confined operations to meet production, environmental, and consumer goals. Applications of …
View article: Changes in maternal body composition and metabolism of dairy goats during pregnancy
Changes in maternal body composition and metabolism of dairy goats during pregnancy Open
The objective of this study was to evaluate the mobilization of nutrients in goats of different gestation types and pregnancy stages. Forty-four Saanen and Oberhasli goats were studied. The goats of each breed and gestation type (single or…
View article: Trace mineral requirements for growth of Moxotó goats grazing in the semiarid region of Brazil
Trace mineral requirements for growth of Moxotó goats grazing in the semiarid region of Brazil Open
A comparative slaughter trial was conducted to estimate the body composition and net requirements of Cu, Zn, Mn, Fe, and Co for growth of castrated Moxotó goat kids, with15.69±0.78 kg initial body weight (BW), grazing in the semiarid regio…
View article: Disentangling digesta passage rate in the gastrointestinal tract of male and female growing goats fed varying feeding levels using multivariate and metanalytical approaches
Disentangling digesta passage rate in the gastrointestinal tract of male and female growing goats fed varying feeding levels using multivariate and metanalytical approaches Open
View article: Metabolizable Protein: 1. Predicting Equations to Estimate Microbial Crude Protein Synthesis in Small Ruminants
Metabolizable Protein: 1. Predicting Equations to Estimate Microbial Crude Protein Synthesis in Small Ruminants Open
Microbial crude protein (MCP) produced in rumen could be estimated by a variety of protocols of experimental sampling and analysis. However, a model to estimate this value is necessary when protein requirements are calculated for small rum…
View article: Metabolizable Protein: 2. Requirements for Maintenance in Growing Saanen Goats
Metabolizable Protein: 2. Requirements for Maintenance in Growing Saanen Goats Open
This study aimed to estimate the protein requirements for the maintenance of growing Saanen goats of different sexes from 5 to 45 kg of body weight (BW) using two methods and applying a meta-analysis. For this purpose, two datasets were us…
View article: Assessing amino acid uptake and metabolism in mammary glands of lactating dairy cows intravenously infused with methionine, lysine, and histidine or with leucine and isoleucine
Assessing amino acid uptake and metabolism in mammary glands of lactating dairy cows intravenously infused with methionine, lysine, and histidine or with leucine and isoleucine Open
The objective of this study was to evaluate the effect of jugular infusions of 2 groups of AA on essential AA (EAA) transport and metabolism by mammary glands. Four Holstein cows in second lactation (66 ± 10 d in milk) were used in 4 × 4 L…
View article: Evaluación de fibra detergente neutra indigestible con incubación en diferentes especies
Evaluación de fibra detergente neutra indigestible con incubación en diferentes especies Open
Objetivo do presente estudo foi avaliar a concentração da fibra em detergente neutro indigestível (FDNi) após a incubação ruminal em bovinos, caprinos e ovinos, e comparar os diferentes resultados com os métodos de estimativa e relacionar …
View article: Indigestible neutral detergent fiber evaluation with incubation in different species
Indigestible neutral detergent fiber evaluation with incubation in different species Open
Objetivo do presente estudo foi avaliar a concentração da fibra em detergente neutro indigestível (FDNi) após a incubação ruminal em bovinos, caprinos e ovinos, e comparar os diferentes resultados com os métodos de estimativa e relacionar …
View article: Energy expenditure of Saanen and Anglo-Nubian goats at different temperatures
Energy expenditure of Saanen and Anglo-Nubian goats at different temperatures Open
View article: Body weight and sex effects on digesta mean retention time in growing Saanen goats
Body weight and sex effects on digesta mean retention time in growing Saanen goats Open
Despite the important role of digesta mean retention time (MRT) on digestive efficiency of ruminants, it is poorly investigated in total gastrointestinal tract (GIT) of growing ruminants, especially in goats. The objective of this study wa…
View article: Macromineral requirements for maintenance in male and female Saanen goats: A meta-analytical approach
Macromineral requirements for maintenance in male and female Saanen goats: A meta-analytical approach Open
View article: Effects of jugular infused methionine, lysine, and histidine as a group or leucine and isoleucine as a group on production and metabolism in lactating dairy cows
Effects of jugular infused methionine, lysine, and histidine as a group or leucine and isoleucine as a group on production and metabolism in lactating dairy cows Open
Essential AA (EAA), particularly leucine, isoleucine, methionine, and histidine, possess signaling properties for promoting cellular anabolic metabolism, whereas methionine, lysine, and histidine are considered also to be substrate limitin…
View article: Selectivity and feeding behavior of Saanen goats subjected to three nutritional levels
Selectivity and feeding behavior of Saanen goats subjected to three nutritional levels Open
This study was conducted to investigate the effect of selective feeding habits on the quality of the ingested diet and the effect of feed restriction on the selectivity and behavior of goats in feedlots. Differences were found only in the …
View article: Genotype effects on energy and protein requirements in growing male goats
Genotype effects on energy and protein requirements in growing male goats Open
Goat genotype may alter the net energy and protein requirements for maintenance (NEm and NPm, respectively) and weight gain (NEg and NPg).This study was designed to investigate and quantify the effect of goat type on NEm, NPm, NEg and NPg,…