scholarly journals The relationship between somatic cell count, milk production and six linearly scored type traits in Holstein cows

2008 ◽  
Vol 52 (No. 12) ◽  
pp. 437-446 ◽  
Author(s):  
E. Němcová ◽  
M. Štípková ◽  
L. Zavadilová ◽  
J. Bouška ◽  
M. Vacek
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Protein Content ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Linear Type ◽  
The Third ◽  
Intermediate Distance ◽  
Level 3 ◽  
Type Traits

Test-day records of somatic cell count (<i>SCC</i>), milk yield, fat and protein content and six linearly scored type traits (fore udder attachment, udder depth, central ligament, rear udder height, front teat placement, teat length) of 22 613 first lactation cows from 117 herds were included in this study. <i>SCC</i> was log-transformed into somatic cell score (<i>SCS</i>). Milk yield was standardized as follows: MILK = milk yield (fat content + protein content)/(3.8 + 3.2). For each analyzed type trait, cows were assigned to one of the three levels according to linear type score: level 1 (score 1 and 2); level 2 (score 5 and 6); level 3 (score 8 and 9). A linear model was used to estimate the effect of different type traits on MILK and <i>SCS</i>. The highest values of <i>SCS</i> were found for the first levels. The differences between the first and second level were on average 0.33, 0.54, 0.28, and 0.36 for fore udder attachment, udder depth, central ligament and rear udder height, respectively. The cows with deep udders, weak central ligaments and fore attachments and low rear udder height showed the highest <i>SCS</i> Low <i>SCS</i> appeared to be associated with an intermediate distance between the front teats and longer teats. The third level of udder depth (shallow udder) had low MILK. Rear udder height showed low MILK for the first level (low height) with the highest MILK values for the third level (high height). The average difference was 3.3 kg.

scholarly journals Genetic relationships of alternative somatic cell count traits with milk yield, composition and udder type traits in Italian Jersey cows

2019 ◽  
Vol 90 (7) ◽  
pp. 808-817 ◽  
Author(s):  
Tania Bobbo ◽  
Chiara Roveglia ◽  
Mauro Penasa ◽  
Giulio Visentin ◽  
Raffaella Finocchiaro ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Genetic Relationships ◽  
Type Traits ◽  
Jersey Cows

Relationship between linear and composite type traits, somatic cell count and lifespan in pedigree and non-pedigree cows

2002 ◽  
Vol 2002 ◽  
pp. 17-17
Author(s):  
R. A. Mrode ◽  
G. J. T. Swanson
Keyword(s):  
United Kingdom ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Linear Type ◽  
The United Kingdom ◽  
Composite Type ◽  
Type Traits ◽  
The Relationship

Lifespan (LS) evaluations in the United Kingdom (UK) are based on bivariate analyses of LS scores, a direct longevity measure calculated from the number of lactations a cow has completed or is expected to complete, and an index of 4 linear type traits as an indirect predictor (Brotherstone et al, 1998). However, the study did not consider composite type traits or somatic cell count (SCC) and the data was only from pedigree herds. This study examines the relationship between type traits and SCC with LS in pedigree and non-pedigree cows.

The effect of lactation number and lactation stage on milk yield, on the composition and on the microbiological properties of raw cow milk in a Hungarian dairy farm

2021 ◽  
Vol 67 (2) ◽  
pp. 3431-3440
Author(s):  
Flóra Mária Petróczki ◽  
Béla Béri ◽  
Ferenc Peles
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Protein Content ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Dairy Farm ◽  
Plate Count ◽  
Daily Milk Yield ◽  
Daily Milk ◽  
Microbiological Properties

Changes in the composition and hygienic properties of milk affect producer price, so it is essential for the responsible dairy farmer to collect information on changes in these parameters due to various factors. In their study, the authors seek to answer the question whether there is a fluctuation in the daily milk yield of cows and in the composition (fat and protein content) and microbiological properties (somatic cell count, total plate count, coliform and S. aureus count) of raw cow’s milk in primiparous and multiparous cows or at different stages of their lactation. Based on the data of a Hungarian large-scale dairy farm, it was found that there was no difference in the fat and protein content of the milk, but the daily milk yield was higher in the case of multiparous cows and, compared to the milk of primiparous cows, their milk had a higher somatic cell count and larger amounts of coliform bacteria. The daily milk yield decreased in the successive stages of lactation, but the fat and protein content of the milk increased, which is presumably due to the concentrating effect of the decreasing milk yield. No significant change was observed in the colony count of microorganisms at the different stages of lactation.

scholarly journals Comparison of fatty acid composition of milk from Holstein and local breed cows in two breeding systems

2021 ◽  
Vol 78 (2) ◽  
pp. 46
Author(s):  
Yakout BENMALLEM REMANE ◽  
Cristophe BLECKER ◽  
Marie Laure FAUCONNIER ◽  
Mohand Mouloud BELLAL ◽  
Nassim MOULA
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Somatic Cell ◽  
Cell Count ◽  
Protein Content ◽  
Acid Composition ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Local Breed

Milk production and quality are influenced by many factors, including nutrition, management practices and breed. The aim of this study was to determine the effect of farming management system and breed on the milk yield, and fatty acid composition of the milk from 50 confinement-fed cows that were fed a total mixed ration, and 52 pasture-fed cows grazed together in rangeland. Individual milk samples (N = 102) were collected once in February. Milk from local breed was characterized by a significantly lower milk yield, and somatic cell count, and a higher protein content than the Holstein breed. The fatty acid composition was relatively the same in both breeds. The result showed that farming management system has no significant effect on the milk yield, somatic cell count, and fat contents, while there was a significant effect on protein content and fatty acid composition. The milk of Holstein cows from extensive system was characterized by more favorable fat fractions with significantly lower concentrations of C10:0, C12:0, C14:0, the sum of short and medium chain saturated fatty acids and n-6: n-3 ratio, and also by higher concentration of unsaturated fatty acids and the sum of n-3 than the milk of Holstein from intensive system.

The effect of suckling following mechanical milking on milk yield, milk composition and somatic cell count in dairy cattle

2000 ◽  
Vol 25 ◽  
pp. 175-177 ◽  
Author(s):  
J.K. Margerison ◽  
C.J.C. Phillips
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Somatic Cell Count ◽  
Milk Protein ◽  
Milk Composition ◽  
Fat Content ◽  
Daily Milk Yield

AbstractSuckling following mechanical milking is common practice in organic dairy production systems and in developing countries. The objective of the experimental work was to assess the effect of suckling and suckling frequency following mechanical milking on milk yield, milk composition and somatic cell count. Two experiments were completed using multiparous dairy cows allocated at 3 days post partum to their respective treatment groups. In experiment one, twenty–four multiparous dairy cows were allocated to one of two treatments for 305 days; 12 cows not suckled (NS) and 12 cows, which were suckled twice daily following mechanical milking (S2). Daily milk yield was significantly greater (P<0.05) in suckled cows, NS 8.0, S2 8.9 (sem 0.18) kg/d. Milk fat content was significantly lower (P<0.05) in suckled cows (NS 32.0, S2 30.7 (sem 0.56) g/kg). However, milk protein was not significantly different in suckled cows, NS 29.2, S2 27.6 (sem 10.79) g/kg compared with non suckled cows. Somatic cell count was significantly lower (P<0.05) in suckled cows NS 106, S2 85 (sem 2.85) 000/ml, compared with non suckled cows. In experiment two, thirty-eight cows were allocated one of two treatments for 120 days; 19 cows not suckled (NS) and 19 cows, which were suckled once daily following the afternoon milking (S1). Suckling took place for fifteen minutes daily following machine milking only. The calves were weaned at 6 months of age. Total daily milk yield was significantly greater (P<0.05) in suckled cows, NS 11.7, S1 12.5 (sem 0.04) (kg/d) compared with non suckled cows. The milk fat and protein content were not significantly different in suckled and non suckled cows. Milk fat content NS 33.4, S1 32.9 (sem 0.14) g/kg and milk protein content NS 29.8, S1 30.0 (sem 0.07) g/kg. In conclusion, suckled cows had significantly higher milk yields. Cows suckled twice daily had significantly lower milk fat content. Suckling did not affect milk protein content. Suckling cows twice daily significantly reduced SCC.

scholarly journals Hyperketonemia Predictions Provide an On-Farm Management Tool with Epidemiological Insights

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1291
Author(s):  
Ryan S. Pralle ◽  
Joel D. Amdall ◽  
Robert H. Fourdraine ◽  
Garrett R. Oetzel ◽  
Heather M. White
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Milk Fat ◽  
Somatic Cell Count ◽  
Past Research ◽  
Management Tool ◽  
Milk Analysis ◽  
Linear Regression Models ◽  
High Throughput Detection

Prediction of hyperketonemia (HYK), a postpartum metabolic disorder in dairy cows, through use of cow and milk data has allowed for high-throughput detection and monitoring during monthly milk sampling. The objective of this study was to determine associations between predicted HYK (pHYK) and production parameters in a dataset generated from routine milk analysis samples. Data from 240,714 lactations across 335 farms were analyzed with multiple linear regression models to determine HYK status. Data on HYK or disease treatment was not solicited. Consistent with past research, pHYK cows had greater previous lactation dry period length, somatic cell count, and dystocia. Cows identified as pHYK had lower milk yield and protein percent but greater milk fat, specifically greater mixed and preformed fatty acids (FA), and greater somatic cell count (SCC). Differential somatic cell count was greater in second and fourth parity pHYK cows. Culling (60d), days open, and number of artificial inseminations were greater in pHYK cows. Hyperketonemia prevalence decreased linearly in herds with greater rolling herd average milk yield. This research confirms previously identified risk factors and negative outcomes associated with pHYK and highlights novel associations with differential SCC, mixed FA, and preformed FA across farm sizes and production levels.

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