Performance evaluation of a newly designed on-farm blood testing system for determining blood non-esterified fatty acid and β-hydroxybutyrate concentrations in dairy cows

2020 ◽  
Author(s):  
Rika Fukumori ◽  
Takayuki Taguchi ◽  
Garrett R. Oetzel ◽  
Shin Oikawa
Keyword(s):  
Performance Evaluation ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Testing System ◽  
Blood Testing ◽  
On Farm

scholarly journals On-farm examination of sainfoin supplementation effects in dairy cows in a roughage-based feeding system: indicators of protein utilisation

2021 ◽  
pp. 104509
Author(s):  
Alexandra N. Kapp-Bitter ◽  
Uta Dickhoefer ◽  
Gerdine Kaptijn ◽  
Vasilisa Pedan ◽  
Erika Perler ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Feeding System ◽  
Protein Utilisation ◽  
On Farm

scholarly journals The Capacity of Holstein-Friesian and Simmental Cows to Correct a Negative Energy Balance in Relation to Their Performance Parameters, Course of Lactation, and Selected Milk Components

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1674
Author(s):  
Ilona Strączek ◽  
Krzysztof Młynek ◽  
Agata Danielewicz
Keyword(s):  
Fatty Acid ◽  
Energy Balance ◽  
Dairy Cows ◽  
Body Condition ◽  
Body Condition Score ◽  
Negative Energy ◽  
Negative Energy Balance ◽  
Holstein Friesian ◽  
Condition Score ◽  
Peak Lactation

A significant factor in improving the performance of dairy cows is their physiological ability to correct a negative energy balance (NEB). This study, using Simmental (SIM) and Holstein-Friesian (HF) cows, aimed to assess changes in NEB (non-esterified fatty acid; body condition score; and C16:0, C18:0, and C18:1) and its effect on the metabolic efficiency of the liver (β-hydroxybutyrate and urea). The effects of NEB on daily yield, production at peak lactation and its duration, and changes in selected milk components were assessed during complete lactation. Up to peak lactation, the loss of the body condition score was similar in both breeds. Subsequently, SIM cows more efficiently restored their BCS. HF cows reached peak lactation faster and with a higher milk yield, but they were less able to correct NEB. During lactation, their non-esterified fatty acid, β-hydroxybutyrate, C16:0, C18:0, C18:1, and urea levels were persistently higher, which may indicate less efficient liver function during NEB. The dynamics of NEB were linked to levels of leptin, which has anorectic effects. Its content was usually higher in HF cows and during intensive lactogenesis. An effective response to NEB may be exploited to improve the production and nutritional properties of milk. In the long term, it may extend dairy cows’ productive life and increase lifetime yield.

scholarly journals Recent Possibilities for the Diagnosis of Early Pregnancy and Embryonic Mortality in Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1666
Author(s):  
Ottó Szenci
Keyword(s):  
Blood Flow ◽  
Dairy Cows ◽  
Early Pregnancy ◽  
Fetal Mortality ◽  
Reproductive Efficiency ◽  
Interferon Tau ◽  
Early Pregnancy Factor ◽  
Pelvic Inlet ◽  
On Farm ◽  
Protein Assays

One of the most recent techniques for the on-farm diagnosis of early pregnancy (EP) in cattle is B-mode ultrasonography. Under field conditions, acceptable results may be achieved with ultrasonography from Days 25 to 30 post-AI. The reliability of the test greatly depends on the frequency of the transducer used, the skill of the examiner, the criterion used for a positive pregnancy diagnosis (PD), and the position of the uterus in the pelvic inlet. Non-pregnant animals can be selected accurately by evaluating blood flow in the corpus luteum around Day 20 after AI, meaning we can substantially improve the reproductive efficiency of our herd. Pregnancy protein assays (PSPB, PAG-1, and PSP60 RIA, commercial ELISA or rapid visual ELISA tests) may provide an alternative method to ultrasonography for determining early pregnancy or late embryonic/early fetal mortality (LEM/EFM) in dairy cows. Although the early pregnancy factor is the earliest specific indicator of fertilization, at present, its detection is entirely dependent on the use of the rosette inhibition test; therefore, its use in the field needs further developments. Recently found biomarkers like interferon-tau stimulated genes or microRNAs may help us diagnose early pregnancy in dairy cows; however, these tests need further developments before their general use in the farms becomes possible.

scholarly journals Effects of forage type and extruded linseed supplementation on methane production and milk fatty acid composition of lactating dairy cows

2015 ◽  
Vol 98 (6) ◽  
pp. 4000-4011 ◽  
Author(s):  
K.M. Livingstone ◽  
D.J. Humphries ◽  
P. Kirton ◽  
K.E. Kliem ◽  
D.I. Givens ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Acid Composition ◽  
Methane Production ◽  
Milk Fatty Acid ◽  
Lactating Dairy Cows ◽  
Forage Type

Influence of dietary docosahexaenoic acid supplementation on the overall rumen microbiota of dairy cows and linkages with production parameters

2014 ◽  
Vol 60 (5) ◽  
pp. 267-275 ◽  
Author(s):  
Valeria A. Torok ◽  
Nigel J. Percy ◽  
Peter J. Moate ◽  
Kathy Ophel-Keller
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Docosahexaenoic Acid ◽  
Dairy Cows ◽  
Bacterial Communities ◽  
Ciliate Protozoan ◽  
Rumen Microbiota ◽  
Production Parameters ◽  
Enteric Methane ◽  
Archaeal Communities

The rumen microbiota contributes to greenhouse gas emissions and has an impact on feed efficiency and ruminant product fatty acid composition. Dietary fat supplements have shown promise in reducing enteric methane production and in altering the fatty acid profiles of ruminant-derived products, yet in vivo studies on how these impact the rumen microbiota are limited. In this study, we investigated the rumen bacterial, archaeal, fungal, and ciliate protozoan communities of dairy cows fed diets supplemented with 4 levels of docosahexaenoic acid (DHA) (0, 25, 50, and 75 g·cow−1·day−1) and established linkages between microbial communities and production parameters. Supplementation with DHA significantly (P < 0.05) altered rumen bacterial and archaeal, including methanogenic archaeal, communities but had no significant (P > 0.05) effects on rumen fungal or ciliate protozoan communities. Rumen bacterial communities of cows receiving no DHA were correlated with increased saturated fatty acids (C18:0 and C11:0) in their milk. Furthermore, rumen bacterial communities of cows receiving a diet supplemented with 50 g DHA·cow−1·day−1 were correlated with increases in monounsaturated fatty acids (C20:1n-9) and polyunsaturated fatty acids (C22:5n-3; C22:6n-3; C18:2 cis-9, trans-11; C22:3n-6; and C18:2n-6 trans) in their milk. The significant diet-associated changes in rumen archaeal communities observed did not result in altered enteric methane outputs in these cows.

Sign in / Sign up

Export Citation Format

Share Document