PSX-B-19 Behaviour of cows while being tested for methane emissions using the greenfeed system

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 220-221
Author(s):  
Christine F Baes ◽  
Gail Ritchie ◽  
Nienke van Staaveren
Keyword(s):  
Dairy Cows ◽  
Repeated Measures ◽  
Average Frequency ◽  
Methane Emissions ◽  
Cattle Breeding ◽  
Testing Conditions ◽  
Genomic Tools ◽  
Dairy Cattle Breeding ◽  
Rapid City ◽  
Over Time

Abstract Increased focus on sustainability is driving a need for environmental efficiency traits in dairy cattle breeding. Breeding for reduced emission of methane, an inevitable product of fermentation in ruminants, is increasingly being explored. Methods to measure methane emissions vary but can be impacted by cow behaviour. As part of an on-going project to develop genomic tools for breeding resilient dairy cows, we explored changes in cow behaviour over time during methane emission measurements. First lactation heifers (n = 49) were tested in tie-stall housing at a research herd in Ontario, Canada. Animals were tested over 5 consecutive days at 08:00h, 12:00h, and 16:00h each day for a 10-min period using the GreenFeed system (C-Lock Inc., Rapid City, SD, USA). The frequency of movement (body shifts and leg lifts) and the number of seconds the cow removed her head from the machine were recorded. The effect of day on the average frequency of movements or time the cow’s head was outside of the machine was assessed using a repeated measures model. In general, cows moved their legs the most on day 1 of testing (76 ± 5.0 movements per 10 min), after which it numerically decreased (e.g., day 5: 68 ± 5.0 movements per 10 min, P = 0.1110). A similar effect was observed for seconds the cow had her head out of the machine (P = 0.0650). Cows spent an average of 39 ± 5.7 sec with their head outside of the machine on day 1 versus 25 ± 3.6 sec on day 5 (P = 0.0499). These preliminary results suggest that cows adapt to the testing conditions; however, changes in their behaviour were minor and do not intervene with recording of methane emissions using the GreenFeed system.

EVALUATION OF LACTATION CURVES OF UKRAINIAN BLACK-AND-WHITE DAIRY COWS DEPENDING ON PARATIPICAL FACTORS

2016 ◽  
Vol 52 ◽  
pp. 31-36
Author(s):  
V. S. Kozyr ◽  
A. D. Hekkiyev
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Objective Assessment ◽  
Dairy Herd ◽  
Mathematical Methods ◽  
Cattle Breeding ◽  
Breeding Programs ◽  
Black And White ◽  
Predicting Performance ◽  
Dairy Cattle Breeding

It was proved that features of lactation curves of cows should be considered at developing breeding programs in dairy cattle breeding, contributing to an objective assessment of a genotype and thus, use of genetic and mathematical methods would increase probability of predicting performance for dairy herd.

METABOLIC PROFILE OF DAIRY COWS BLOOD IN DYNAMICS OF PUERPERIUM DURING RESTORATION AND DEPRESSION OF OVULATORY OVARIAN FUNCTION

1970 ◽  
pp. 59-63
Author(s):  
A. M. Sineva ◽  
A. V. Lysenko ◽  
A. G. Nezhdanov ◽  
V. A. Safonov ◽  
V. A. Lukina ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Ovarian Function ◽  
Nervous Activity ◽  
The State ◽  
Ovarian Dysfunction ◽  
Cattle Breeding ◽  
Holstein Friesian ◽  
Dairy Cattle Breeding ◽  
Relationship Of ◽  
The Relationship

The decrease in fertility of highly productive dairy cows associated with postpartum ovarian depression is becoming one of the significant problems of modern dairy cattle breeding. The aim of this study was to identify and assess the state of protein, carbohydrate and lipid metabolism in Holstein-Friesian cows in the dynamics of postpartum period with the restoration and depression of ovarian ovulatory function against the background of their adequate feeding. The experiment included 16 fresh cows with an average annual dairy productivity of 9.5 ths kg. The blood for the study was obtained from the caudal vein on the 6th, 12th, 40th and 68th days after calving. Blood serum content of total protein and its fractions, urea, creatinine, total lipids, cholesterol, triglycerides and glucose was determined. The state of genitals was evaluated by transrectal palpation and ultrasound scanning, as well as by blood concentration of progesterone and estradiol. It has been shown that the formation of postpartum ovarian dysfunction in cows occurs against the background of low blood content of glucose, globulin protein fractions and increased creatinine content. The threshold serum concentration of glucose during the first two weeks after calving, at which ovarian dysfunction and a decrease in animal fertility should be predicted, is less than 2,2 mmol/L. There was expressed a judgment on the appropriateness of further researches to identify the relationship of the metabolic status of animals with the typological features of their higher nervous activity.

scholarly journals Does the diurnal pattern of enteric methane emissions from dairy cows change over time?

animal ◽  
2018 ◽  
Vol 12 (10) ◽  
pp. 2065-2070 ◽  
Author(s):  
M.J. Bell ◽  
J. Craigon ◽  
N. Saunders ◽  
J.R. Goodman ◽  
P.C. Garnsworthy
Keyword(s):  
Dairy Cows ◽  
Methane Emissions ◽  
Diurnal Pattern ◽  
Change Over Time ◽  
Enteric Methane ◽  
Over Time ◽  
Enteric Methane Emissions

RELATIONSHIPS AMONG UDDER MEASUREMENTS, MILKING SPEED, MILK YIELD AND CMT SCORES IN YOUNG DAIRY COWS

1984 ◽  
Vol 64 (4) ◽  
pp. 807-815 ◽  
Author(s):  
T. R. BATRA ◽  
A. J. McALLISTER
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Key Words ◽  
Milk Yield ◽  
Genetic Correlations ◽  
Cattle Breeding ◽  
California Mastitis Test ◽  
Dairy Cattle Breeding ◽  
Heritability Estimates ◽  
National Cooperative

Heritabilities, phenotypic and genetic correlations among udder measurements (front teat length, front teat diameter, rear teat length, rear teat diameter, teat distance, udder height), milking speed, and milk yield were estimated for a Holstein line (H) and an Ayrshire-based line (A). Data from 1159 first lactation heifers in the National Cooperative Dairy Cattle Breeding Project were used. A subset of these data from 385 cows measured for the above traits plus California Mastitis Test (CMT) Score were analyzed to estimate relationships among udder measurements, milking speed, milk yield, and CMT score. Front teats were on the average 0.7 cm longer than rear teats. Heritability estimates of udder measurements, milking speed, and milk yield were moderate and ranged from 24% to 57% for the H line, 22% to 61% for the A line and 16% to 51% for the subset of data, except for teat distance in the H line which had a heritability of 5%. Heritability of CMT score was zero. Udders that were closer to the ground tended to have longer and wider teats. High-producing cows milked faster, had lower CMT score, and had udders closer to the ground than low producing cows. Genetic correlations of udder measurements with milking speed and milk yield were small and nonsignificant except for front teat diameter and teat distance which were negatively correlated with milk yield in H line heifers. Key words: Udder measurements, milking speed, milk yield, CMT score, dairy cattle

Estimation of lactation curve parameters for Iranian Holstein dairy cows using non-linear models

2000 ◽  
Vol 2000 ◽  
pp. 109-109 ◽  
Author(s):  
H. Farhangfar ◽  
P. Rowlinson ◽  
M.B. Willis
Keyword(s):  
Dairy Cows ◽  
Linear Models ◽  
Linear Functions ◽  
Cattle Breeding ◽  
Selection Decisions ◽  
Lactation Curve ◽  
Non Linear ◽  
Dairy Cattle Breeding ◽  
Breeding Programmes ◽  
Holstein Dairy Cows

In dairy cattle breeding programmes the knowledge of cow's lactation curve could be an effective tool to make selection decisions. In order to obtain an accurate shape of lactation curve a variety of mathematical models have been used in which parameters of production peak, inclining and declining phases of milk production over the course of lactation have been estimated by linear or non-linear techniques. The main purpose of this research was to compare four non-linear functions for the estimation of first lactation curve of Iranian Holstein dairy cows.

PRODUCTIVE FEATURES OF COWS OF DIFFERENT LINES

2020 ◽  
Vol 5 (86) ◽  
pp. 177-182
Author(s):  
A.S. Kharitonova ◽  
◽  
◽  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Live Weight ◽  
Fat Content ◽  
Holstein Cows ◽  
Control Group ◽  
Milk Productivity ◽  
Cattle Breeding ◽  
Breeding Work ◽  
Dairy Cattle Breeding

Dairy cattle breeding is a structure forming branch of agriculture. Increasing the intensity of productivity in the dairy cattle breeding requires improvement of animals, which can be achieved through selection and breeding work. Therefore, one of the most important tasks in dairy cattle breeding is constant work to improve the productive and breeding qualities of breeds, types, lines and crosses of the livestock. Further increase in the productivity of a herd of dairy cows depends largely on improving the genotype of animals, increasing the hereditary potential of dairy productivity of cows. This problem can be solved, first of all, both by intrabreed selection, and on the basis of interbreeding. The aim of the study was to study the productive features of various lines of Holstein cows. The research was conducted on animals in the farm of LLC "Yupiter" in the Bolkhov district of the Orel region. As a result of this study, it was found that the control group Wes Back Ideal 1013415 had the lowest indicators of live weight for all indicators except live weight at birth. Cows of the Wes Back Ideal 1013415 line surpass in milk productivity for 305 days of lactation the first-born cows of other lines by 57,606 and 409,888 kg. The highest indicators of milk and specific fat content coefficients for the first lactation were in cows of the control group of the Wes Back Ideal 1013415 line – 1841,145 and 60.006 kg, respectively.

Impact of milking modalities on the occurrence of subclinical mastitis and the anti-bacterial effect of honey on isolated bacteria (Escherichia coli)

2018 ◽  
Vol 8 (1) ◽  
pp. 13-18
Author(s):  
Zidane Nadia ◽  
Ghazi Kheira
Keyword(s):  
Escherichia Coli ◽  
Dairy Cows ◽  
Inhibition Zone ◽  
Subclinical Mastitis ◽  
The Other ◽  
Post Mortem ◽  
Cattle Breeding ◽  
E Coli ◽  
Dairy Cattle Breeding ◽  
Bacterial Effect

Prevention of mastitis is a major concern in dairy cattle breeding, and is among the most costly diseases of dairy companies. The purpose of this study was to compare two types of milking practices; one using manual milk-ing and the other using mechanical milking to determine milking type consequences on the occurrence and spread of subclinical mastitis. One hundred dairy cows were brought to the slaughterhouse following a fall in milk production due to subclinical mastitis, of which 64 cows were mechanically milked and 36 cows were manually milked. After anti-mortem and post-mortem examinations, we found that 58% of cows in mechanical milking mode had mastitis. Amongst them 9% of cows had mastitis spread on the four teats. However, the rate was higher (68%) in cows where milking was done manually, of which 49% mastitis spread on the four teats. The bacterio-logical analyses was carried out regarding coliforms, Staphylococci and Streptococci on the raw milks of cows suspected of mastitis, irrespective of the mode of milking.. We chose E. coli and found that its resistance against antibiotics tested was important, except Gentamicin where the sensitivity was average with an inhibition zone of 1.6 cm. We then evaluated the effect of pure honey on the strain to see its antiseptic effect. We noticed the inhibition zone diameters of 2.2 cm. We also tested the effect of diluted honey, the results of which were not satisfactory because of the decreased antisep-tic activity possibly owing to decreased acidity of the honey.

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