Graduate Student Literature Review: Concepts and challenges of amino acid supply and nitrogen metabolism in dairy cattle DOI Creative Commons
Maria Helena de Oliveira, Ciniro Costa, Tatiane Fernandes

и другие.

Journal of Dairy Science, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Nitrogen utilization in dairy cows is crucial for maximizing production efficiency and minimizing environmental impacts. Ruminants possess a unique digestive system filled with microorganisms that work synergically to degrade feed particles provide nutrients both the microorganism host metabolism. Dietary N, supplied as true protein NPN, undergoes different degradation processes: portion degraded rumen, another escapes ruminal (i.e., RUP). Rumen-degraded essential microbial growth, contributing formation of CP (MCP). Amino acids present MCP RUP are digested absorbed into bloodstream become available animal metabolism (e.g., maintenance, production) constitute MP. Accurately assessing degradability AA availability remains challenge due limitations current evaluation methods. In situ techniques most commonly used technique this purpose, but they not meant predict MCP, RUP, consequently metabolizable supply ingredients, which compromises diet formulation. Microbial growth enhanced when fermentable energy N rumen. However, extent recycling sustaining under low-protein diets adequately captured by prediction models. Due these limitations, several biases added models, resulting overfeeding an attempt MP requirements increasing costs overload environment. Therefore, review aims synthesize fundamental information on complex interplay factors influencing degradation, synthesis, supply, metabolism, efficiency, highlight knowledge gaps must be addressed improve accuracy models cattle.

Язык: Английский

Network analyses unraveled the complex interactions in the rumen microbiota associated with methane emission in dairy cattle DOI Creative Commons

Xiaoxing Ye,

Goutam Sahana, Mogens Sandø Lund

и другие.

Animal Microbiome, Год журнала: 2025, Номер 7(1)

Опубликована: Март 11, 2025

Methane emissions from livestock, particularly dairy cattle, represent a significant source of greenhouse gas, contributing to the global climate crisis. Understanding complex interactions within rumen microbiota that influence methane is crucial for developing effective mitigation strategies. This study employed Weighted Gene Co-expression Network Analysis investigate emissions. By integrating extensive sequencing data with precise emission measurements in 750 Holstein our research identified distinct microbial communities and their associations production. Key findings revealed blue module network analysis was significantly correlated (0.45) In this module, taxa included genera Prevotella Methanobrevibactor, along species such as brevis, ruminicola, baroniae, bryantii, Lachnobacterium bovis, Methanomassiliicoccus luminyensis are key components drive networks. However, absence metagenomics difficult reveal deeper level functional profiles. The application provided comprehensive understanding microbiota-methane relationship, serving an innovative approach microbiota-phenotype association studies cattle. Our underscore importance microbiota-trait microbiota-microbiota related systematic production offers information on management mitigating environmental impact cattle population.

Язык: Английский

Процитировано

0

The Effect of Alpine Herbs on the Microbiota of In Vitro Rumen Fermentation DOI Creative Commons

Jonas Andersen,

Selene Massaro,

Giulia Dallavalle

и другие.

Fermentation, Год журнала: 2025, Номер 11(2), С. 83 - 83

Опубликована: Фев. 7, 2025

Milk from cows grazing on alpine pastures has higher quality than milk indoor-fed cows, likely due to diet-driven differences in rumen microbiota. We assessed the effects of supplementing herbs—each varying its content fiber, protein, and polyphenol—on microbiota via vitro fermentation, comparing these a grass hay control using metagenomic sequencing. Fermentations with herbs compared had fibrolytic Prevotella lower abundances Butyrivibrio, Ruminococcaceae, Anaerovibrio, Succiniclasticum, Desulfovibrio. high starch (Alchemilla vulgaris, Gallium odoratum Sanguisorba officinalis) low, microbial diversity, while fermentations structural fibre (Sisymbrium officinale, Tanacetum vulgare, Cicerbita alpina) diversity. C. alpina, Sa. officinalis, T. vulgare that lignin showed abundance Bacteroidetes Firmicutes. protein (G. vulgare) induced Lachnospiraceae. officinalis A. vulgaris polyphenols were associated increased Streptococcus family RF-16 BS11 alpina Si. Officinale Fibrobacter succinogenes. The beta diversity between corresponded contents lignin, plant material. In conclusion, different can promote various fibrinolytic bacteria change which potential increase feed efficiency robustness reduce methane production.

Язык: Английский

Процитировано

0

The Effects of Dried Apple Pomace on Fermentation Quality and Proteolysis of Alfalfa Silages DOI Creative Commons
Tongtong Dai,

Jiangyu Long,

Guanjun Zhang

и другие.

Agronomy, Год журнала: 2025, Номер 15(2), С. 438 - 438

Опубликована: Фев. 11, 2025

This work aimed to evaluate the effects of dried apple pomace (DAP) on fermentation characteristics and proteolysis alfalfa silages. The was ensiled with (1) no additives (control), (2) 5% DAP, (3) 10% DAP (4) 15% based fresh weight (FW) for 1, 3, 7, 14, 30 60 days, respectively. With increasing proportion lactic acid bacteria (LAB) count, (LA) dry matter (DM) content linearly (p < 0.05) increased, while pH, acetic (AA), propionic (PA), butyric (BA) ammonia nitrogen (NH3-N) decreased during ensiling. silages had significantly lower aerobic (AB), yeast enterobacteria counts than control contents nonprotein (NPN), peptide (peptide-N) free amino (FAA-N) activities carboxypeptidase, aminopeptidase proteinase as increased On day 60, addition tryptamine, phenylethylamine, putrescine, cadaverine, histamine, tyramine, spermidine, spermine total biogenic amines compared control. As ratio threonine, valine, isoleucine, leucine, phenylalanine, lysine, histidine, arginine, aspartic acid, serine, glutamic, acids, crude protein (CP) water-soluble carbohydrates (WSCs) glycine, alanine, cysteine, proline 60. Overall, optimal indicated by better quality less other treatments.

Язык: Английский

Процитировано

0

Dietary Moringa oleifera improves goat milk quality: Benefits for human nutrition and the dairy industry DOI Creative Commons
Miri Cohen,

Einav Shor-Shimoni,

Tzach Glasser

и другие.

Food Chemistry, Год журнала: 2025, Номер 479, С. 143786 - 143786

Опубликована: Март 9, 2025

This study evaluated the effects of Moringa oleifera silage on milk quality in lactating goats, aiming to produce a nutritionally enriched product with health-promoting compounds. In line this goal, from Moringa-fed goats exhibited higher fat, protein, and lactose contents, along significant reduction somatic cell count, compared those fed clover hay. Enhanced antioxidant status was indicated by increased α-tocopherol (P < 0.05) lower malondialdehyde levels 0.05). Additionally, showed substantial increase both yield 0.01) concentration 0.001) phospholipids, changes their composition. accompanied omega-3 fatty acids n-6/n-3 ratio 0.01). The highlights beneficial potential dietary supplementation enriching nutritional value goat inducing accumulation nutraceutical attributes.

Язык: Английский

Процитировано

0

Microbiomic and Metabolomic Insights into the Roles of Hydrolysable Versus Condensed Tannins on the Growth Performance, Nutrient Digestion, and Rumen Fermentation in Liaoning Cashmere Goats DOI Creative Commons
Xin Zhu,

Xingtang Dou,

Tingting Su

и другие.

Microorganisms, Год журнала: 2025, Номер 13(4), С. 933 - 933

Опубликована: Апрель 17, 2025

This study was conducted to compare the effects of hydrolysable versus condensed tannins on growth performance, nutrient digestion, and rumen fermentation in goats. A total 27 Liaoning cashmere goats with similar initial body weights were randomly distributed into three groups: a basal diet, diet +0.5% tannic acid (hydrolysable tannin, HT), or quebracho tannin (condensed CT), respectively. Compared control group, HT showed decreased (p < 0.05) feed intake, while CT an increased intake weight gain. Digestibility dry matter, crude protein, neutral detergent fiber, fiber did not differ > among groups. The group lower pH acetic concentration 0.05), decrease abundances Verrucomicrobia Methanobrevibacter. Supplementation levels dihydrouracil, xanthosine, alpha-D-mannose, L-tryptophan, these metabolites. In conclusion, this suggested that responses ruminal microbiota metabolite profiles type varied, displayed more positive effect performance than when supplemented at same level diets.

Язык: Английский

Процитировано

0

Inclusion of Fermented Cassava Top and Root with Inoculation in Total Mixed Ration Silage Diets: Ensilage Quality and Nutrient Digestibility of Backgrounding Crossbred Bulls DOI Creative Commons
Pichad Khejornsart,

Unchan Traithilen,

Theerayut Juntanam

и другие.

Veterinary Sciences, Год журнала: 2025, Номер 12(5), С. 402 - 402

Опубликована: Апрель 24, 2025

The use of cassava as a feed resource is the main focus strategies that aim to increase efficiency beef cattle. In this study, ratio fresh tops roots (CTR) was 1:1, 1:2, 1:3, and 1:4 w/w, in addition incorporation yeast lactic acid bacteria (YL). CTRS inoculated vitro with rumen fluid substrate mixture evaluate gas production fermentation quality. vivo, crossbred cattle were randomly allocated three dietary treatments: control group two groups received total mixed ration (TMR) silage either 35% or 70% concentrate replaced CTRS. This study found levels crude protein condensed tannins (CTs) relatively increased by (p < 0.05), while pH decreased proportion increased. significantly enhanced dry matter digestibility, cumulative at 96 h, kinetics, MBP especially 1:2 group. vivo experiment, DM intake, CP, propionic concentration compared showed great potential for improving NDF digestibility. Moreover, when TMR substituted offered cattle, it ruminal NH3-N blood glucose 0.05). reduced cost 50.54% Our findings suggest optimizing inclusion could be viable strategy producers aiming enhance performance profitability.

Язык: Английский

Процитировано

0

Graduate Student Literature Review: Concepts and challenges of amino acid supply and nitrogen metabolism in dairy cattle DOI Creative Commons
Maria Helena de Oliveira, Ciniro Costa, Tatiane Fernandes

и другие.

Journal of Dairy Science, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Nitrogen utilization in dairy cows is crucial for maximizing production efficiency and minimizing environmental impacts. Ruminants possess a unique digestive system filled with microorganisms that work synergically to degrade feed particles provide nutrients both the microorganism host metabolism. Dietary N, supplied as true protein NPN, undergoes different degradation processes: portion degraded rumen, another escapes ruminal (i.e., RUP). Rumen-degraded essential microbial growth, contributing formation of CP (MCP). Amino acids present MCP RUP are digested absorbed into bloodstream become available animal metabolism (e.g., maintenance, production) constitute MP. Accurately assessing degradability AA availability remains challenge due limitations current evaluation methods. In situ techniques most commonly used technique this purpose, but they not meant predict MCP, RUP, consequently metabolizable supply ingredients, which compromises diet formulation. Microbial growth enhanced when fermentable energy N rumen. However, extent recycling sustaining under low-protein diets adequately captured by prediction models. Due these limitations, several biases added models, resulting overfeeding an attempt MP requirements increasing costs overload environment. Therefore, review aims synthesize fundamental information on complex interplay factors influencing degradation, synthesis, supply, metabolism, efficiency, highlight knowledge gaps must be addressed improve accuracy models cattle.

Язык: Английский

Процитировано

0