If easily digestible saccharides are deficient in the feed ration of bulls with the live weight of 300 kg and at simultaneous single application of urea at a rate of 0.2 g per 1 kg live weight, zeolite (with 50.6% clinoptilolite content) administered at a rate of 2.5% per 1 kg dry matter influenced significantly (P less than 0.05) the ammonia concentration in rumen, v. portae and v. jugularis. The rumen contents and blood were sampled at the intervals of 0, 15, 30, 60, 90, 120, 180 and 360 minutes after feeding. Basal feed ration consisted of 1 kg feed mixture and 3 kg meadow hay. After urea administration, zeolite reduced the ammonia concentration in rumen by 20-40% in comparison with the control group and in v. portae by 60-70%. In v. jugularis in the 90th minute after feeding significant hyperammonemia was observed in bulls with no zeolite supplement. Zeolite administration did not influence urea concentration in plasma.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Integrating Metabolomics and Genomics to Uncover the Impact of Fermented Total Mixed Ration on Heifer Growth Performance Through Host-Dependent Metabolic Pathways.
Animals (Basel)
January 2025
Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
With the increasing demand for enhancing livestock production performance and optimizing feed efficiency, this study aimed to investigate the effects of fermented total mixed ration (FTMR) containing different proportions of rice straw and sheath and leaves of on systemic nutrient metabolism and oxidative metabolism under host genetic regulation and on growth performance of heifers. A total of 157 heifers aged 7-8 months were selected, and their hair was collected for whole-genome sequencing. They were randomly assigned into four groups of 18 to 21 cattle each and fed FTMR containing varying levels of rice straw (21% in LSF, 28% in MSF, 35% in HSF) or 31% sheath and leaves of (ZF) for a two-month period.
View Article and Find Full Text PDFEfficacy of Fat Supplements with Different Unsaturated/Saturated FA Ratios Undergoing First Postpartum Ovulation in Lactating Anovulatory Goats.
Vet Sci
January 2025
School of Veterinary Medicine, Ceará State University (UECE), Fortaleza 60714-903, CE, Brazil.
We investigated whether microalgae or linseed supply during the early postpartum period affects ovarian restimulation and supports the first postpartum ovulation in lactating anovulatory goats. Thirty-eight An-glo-Nubian-crossbred adult goats were allocated into three groups, one with a control diet ( = 12), fed a total mixed ration (TMR) comprising chopped elephant grass and concentrate; an algal diet ( = 13), fed TMR + green microalgae (1% dry matter); and a linseed diet ( = 13), TMR + linseed (12% dry matter). Supplements were furnished from the second to fifth week (time of weaning).
View Article and Find Full Text PDFPalmitic Acid in the Diet of Dairy Goats and Its Effect on Physicochemical Characteristics and Fatty Acid Profile of Goat Kid Meat.
Anim Sci J
January 2025
General Terán Experimental Field, National Institute of Forestry, Agricultural and Livestock Research, General Terán, Mexico.
The objective of this study was to evaluate the impact of incorporating palmitic acid into the diet of dairy goats on the physicochemical characteristics, nutritional value, and fatty acid profile of goat kid meat. For this, 28 Creole local kids were used, divided into the following treatments: grazing, kids fed milk from grazing goats; base diet, kids fed milk from goats in confinement with a total mixed ration; base diet + 3PA, kids fed milk from goats in confinement that consumed the base diet plus 3% palmitic acid; and base diet + 6PA, kids fed milk from goats in confinement fed with the base diet plus 6% palmitic acid. The feeding period was conducted over a 30-day period.
View Article and Find Full Text PDFPrediction of microbial crude protein flow from the rumen of dairy cattle by means of dietary characteristics - a meta-analysis.
Arch Anim Nutr
January 2025
Institute of Animal Science, University of Bonn, Bonn, Germany.
Protein supply to ruminants relies mainly on the flow of microbial crude protein (MCP) from the rumen, which is commonly assumed to primarily depend on energy supply. This study evaluated this assumption with recent data and tested if ruminally fermented organic matter (FOM) was a better predictor of MCP flow than total-tract digestible organic matter (DOM) and if more variables could improve the prediction of MCP flow. A previously published data set was extended by additional studies resulting in a data set of 139 studies including 407 treatment means, typical to Central European rations.
View Article and Find Full Text PDFNutrient use and methane emissions in growing beef fed different protein sources and a pasture-based diet.
J Anim Sci
January 2025
University of Reading, School of Agriculture, Policy and Development, Earley gate, RG6 6EU Reading, United Kingdom.
This study investigated the effects of different protein sources on feed intake, nutrient, and energy utilization, growth performance, and enteric methane (CH4) emissions in growing beef cattle, also evaluated against a pasture-based diet. Thirty-two Holstein × Angus growing beef were allocated to four dietary treatments: a total mixed ration (TMR) including solvent-extracted soybean meal as the main protein source (SB; n = 8), TMR with local brewers' spent grains (BSG; n = 8), TMR with local field beans (BNS; n = 8), and a diet consisting solely of fresh-cut Italian ryegrass (GRA; n = 8). Every four weeks, animals were moved to digestibility stalls within respiration chambers to measure nutrient intakes, energy and nitrogen (N) utilization, and enteric CH4 emissions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!