scholarly journals Assessment breeding high–yielding cows bukovynske factory type of ukrainian red–white dairy cattle

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
A. I. Lyubinskiy
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
High Performance ◽  
Economic Conditions ◽  
The Arctic ◽  
Plant Type ◽  
Lower Figure ◽  
Productive Potential ◽  
Dairy Breed

The results of research on the assessment of breeding qualities of high performance cows Bukovina Ukrainian plant type red–white dairy breed. Established that the productive potential of the cow estimated high enough that opens significant opportunities for formation buhayvidtvoryuvalnoyi group of cows to produce the next generation of producers. Much of cows good milking combines high content of fat and protein in milk. The best indicators for milk yield (over 7000 kg) were daughters of sires Captain 6775, Artek 344, Polar 49, Mozart 475, Dzharomira 6296217, Guido 40535, Madzhesti 2071114. For fat milk probably stood daughter Nord 3126 (3.86%) and was the lowest rate in cows that received from the Senate in 1632, 3160 and Lighthouse Dzharomira 6296217 (3.75%). The content of protein in milk was the best daughter of Captain 6775, Artek 344, Polar 49, 475 Mozart (3.31 – 3.33%) and slightly lower figure was Dzharomira daughters 6296217 (3.25%). Note that the daughter of Captain bulls 6775, the Arctic 49, Nord 3126 well combine high milk production of fat and protein in milk. It is appropriate to further use of highly productive cows, bulls–sires and their descendants in the system of selection and breeding herds in the creation of high–performance factory type Bukovina Ukrainian red–white dairy breed for specific economic conditions and effective improvement genealogical structure

scholarly journals PRODUCTIVITY OF COWS OF UKRAINIAN BLACK-AND-WHITE AND RED-AND-WHITE DAIRY BREEDS

2018 ◽  
Vol 51 ◽  
pp. 112-118
Author(s):  
V. V. Machulnyi
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Fat Content ◽  
Reproductive Capacity ◽  
Black And White ◽  
Reproductive Ability ◽  
Service Period ◽  
Dairy Breed

Milk yield of cows in breeding herds, Cherkassy region, for last completed lactation averaged 6442 kg of milk with 3.62 % fat content. Currently the question of interconnection of cows’ milk production and reproductive capacity is especially important, because the significant increase in milk yields makes minimize calves. The successful conduct of breeding had set the goal to detect the best options for combining milk production and reproductive ability of animals.To characterize the level of milk production including reproductive ability of cows we used indicator of daily average milk yield per one day of periods between calving (PBC). The best service period can be considered period of 51-90 days, that allows you to get one calf per cow per year (average PBC is 351 days) and maintain high milk production (6431 ± 39.6 kg during 305 days of lactation). With this service period all indicators of milk production and reproductive ability are at high level. Reduced service period below recommended levels will reduce the duration of lactation and milk production, and increasing service period will increase the duration of lactation with a simultaneous reduction in milk production for 305 days. Herewith deterioration of reproductive ability is marked and manifested in the increase of the insemination index, decline in the reproductive capacity, increase of periods between calving and as a result, reduce of calves and culling barren cows.Analysis of genealogical structure of the studied herds points to low diversity (Ukrainian Black-and-White dairy cows belong to 6 lines and Ukrainian Red-and-White dairy cows – to 8 ones) with high affinity (by Chief 1427381.62 to R. Sovereign 198998 bloodline, by Starbuck 352790.79 to Elevation 1491007 and Ideal1013415 bloodlines).Genealogical structure of the herds is saturated a lot of bulls genealogical groups of Holstein cattle: Chief 1427381 – 11 bulls in the array of Ukrainian Black-and-White dairy breed and 5 ones in Ukrainian Red-and-White dairy breed, Starbuck 352790.79 – 10 sires in the array of Ukrainian Black-and-White dairy cattle and 3 ones in Ukrainian Red-and-White dairy breed, Elevation 1491007.65 – 4 sires in the array of Ukrainian Black-and-White dairy cattle and 3ones in Ukrainian Red-and-White dairy breed.Currently the sires of Chief 1427381.62 (7712-3,76-289,9-3,14-242,1), Starbuck 352790 (7857-3,87-295,4-3,07-241,2), Jocko Besne 694028588.94(6687-3,88-259,5-3,03-202,6), and Bell 1667366 bloodlines (61341-3,95-242,3-3,02-185,2) among sires of Ukrainian Black-and-White dairy cattle and the sires of Cavalier 1620273.72 (7285-3,98-289,9-3,08-224,4), Chief 1427381.62 (7522-3,76-282,8-3,00-225,7),Starbuck 392405 (7667-3,87-296,7-3,00-230,0), and Elevation 1491007.65 bloodlines (7544-3,80-286,7-3,5-230,0) among sires of Ukrainian Red-and-White dairy breed are classified to a highly productive and promising for breeding and wider use by productive qualities.After the first insemination the lowest proportion of fertilized cows is among offspring belonging to Chief 1427381 bloodline which is only 38 % among both breeds. However, the milk yield of breeding stock belonging to this bloodline is 7712 kg with 3.76 % fat content for Ukrainian Black-and-White dairy cows and 7522 kg of milk with 3.76 % fat content for Ukrainian Red-and-White dairy cows. Daughters belonging to Elevation1491007, Valiant 1650414, and Hanover 1629391 bloodlines with yields of 4566-5478 kg of milk per lactation had a part of fertilized cows, after the first insemination, at the level of 41-49 %. Fertilization after the first insemination above 50% was in daughters belonging to Cavalier 1620273.72 (52%), Starbuck 392405(50-55 %), Bell 1667366(56%) and Jocko Besne 694028588.94 bloodlines (64 %). The level of performance of these animals for milk yield ranged from 6134 kg to 7857 kg.Heritability coefficients of milk yield and duration of service period were low (0.118-0.289). A positive correlation can be explained by the fact that extension of service period (to a certain level) leads to growing number of milking days (duration of lactation) and defers a decrease in productivity of cows by physiological reasons, namely as a result of pregnancy. Low rates of heritability indicate little genetic diversity of traits and the significant influence of physiological and environmental factors in their formation.As Ukrainian Black-and-White and Ukrainian Red-and-White dairy breeds have a high proportion of heredity of Holstein breed which has genetically large fetus, there is need to study the characteristics of nature passing calving in cows of these breeds. Itis found the number of first-calf heifers which needed help was 52.4%. Animals calve alone in 47.6 % of all cases. Calving was without complications if the live weight of calves not exceeding 6-7% of mother’s weight. The cows calved without help of staff exceeded by 11.7% of the width of the pelvis in the buttocks, 7.5 % of the width of the ilium, and 7.1 % of its oblique length compared with animals of same age.

scholarly journals SELECTION OF THE SITUATION IN SEEF «OLEKSANDRIVSKE» FOR BREEDING UKRAINIAN RED-AND-WHITE DAIRY CATTLE AND UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE AND ITS IMPROVING

2018 ◽  
Vol 51 ◽  
pp. 69-73 ◽  
Author(s):  
G. S. Kovalenko ◽  
S. V. Priyma ◽  
G. A. Holysa ◽  
A. V. Tuchyk ◽  
L. V. Marchuk ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Fat Content ◽  
Breeding Value ◽  
Body Structure ◽  
Point Scale ◽  
Black And White ◽  
Dairy Breed

Created Ukrainian Red-and-White Dairy and Ukrainian Black-and-White Dairy cattle have a desirable level of reproductive and productive qualities.  These breeds are competing successfully with animals of the European selection, so comparative study of pedigree and productive qualities of animals at one of the farms has practical value. The studies were conducted in the herd of “Oleksandrivske” SE RF at the animals of Ukrainian Red-and-White Dairy and Ukrainian Black-and-White Dairy breeds of Vinnytsia region. The animals of both breeds were kept under the same technological conditions in housing for livestock. It was taken into account milk production (milk yield, fat content in milk and milk fat) for 305 days of lactation. Expert evaluation of the exterior of first-calf heifers has been conducted for 2015-2016. Assessment of type of body structure of cows was conducted on 100-point scale. Fatness of cows was determined on 5-point scale. The analysis of genealogies of 37 bulls which had progeny in the herd was conducted by breeding index, discharge of breeding values and milk production of ancestors. Milk production of the animals of the herd was more than 6000 kg of milk for 305 days of lactation. Comparing milk yields, it was found that the animals of Ukrainian Black-and-White Dairy breed dominated Ukrainian Red-and-White Dairy cows of the same age. It is noteworthy that biological feature of cows to increasing milk yield with each subsequent lactation is positive. Thus, the Ukrainian Black-and-White Dairy cows after the second calving in comparison with the first calving increased milk yield by 380 kg and the animals after the third calving and older comparatively with the second one – by 425 kg more. Also the Ukrainian Red-and-White Dairy cows increased milk yield, respectively, by 348 and 358 kg. The average body measurements of the first-calf heifers were inferior by targeted parameters of Ukrainian Red-and-White Dairy and Ukrainian Black-and-White Dairy cattle from -0.3 cm (girth of metacarpus) to -7.8cm (height in the sacrum) in most cases.  The total number of points for type of body structure was 87.9 at the animals of Ukrainian Black-and-White Dairy cattle and, respectively, 87.0 at the Ukrainian Red-and-White Dairy cows; it corresponds to the assessment "very good". This indicates the high estimation of individual parts of the exterior. The cows of the herd had the required fatness. The average of this trait at animals of Ukrainian Black-and-White Dairy breed was 3.0 points and at the cows of Ukrainian Red-and-White Dairy cattle was respectively 3.4 points. The genealogical structure of the current herd of “Oleksandrivske” SERF consists of two female contingents. The animals of Ukrainian Black-and-White Dairy cattle were derived from 18 bulls belonging to 8 bloodlines. Most of animals belong to R.O.R.Elevation 1491007 bloodline – 45.4%, H.H.Starbuck 352790 and P.F.A.Chief 1427381 bloodlines – 14.4%. Qualitative characteristic of bulls used for the female livestock of the herd, shows that in the vast majority they are valuable breeding bulls. However, it should be noted that there are progeny derived from bulls with low breeding value in the herd. Thus, bull Matrix Red 136549448 had SI-7 and H- and Trubadur 343643346 had SI-50 and H-. The use of bulls for female livestock of the herd with low breeding value is unacceptable for further breeding work. Expectation of improving the breeding traits in progeny from such fathers is unlikely. It is planned to accelerate the reproduction of valuable genotypes and increase the rate of genetic progress at the herd using embryos transplantation this year. Donors of embryos will be their own breeding resources. Using this method will make it possible to exclude from the selection process animals with exterior defects and low-yielding cows. The considered aspects of selective breeding work indicate prospects of using Ukrainian Red-and-White Dairy and Ukrainian Black-and-White Dairy cattle. This applies particularly to increase of milk yield to 8000 kg and more per lactation. Bulls which will be used for breeding stock should have high rates of breeding values (SI +1000 and P4 and more). Especially it applies such features as fat content in milk and some exterior defects.

Comparison of milk production, mastitis, lameness and days to conception of Brown Swiss, Holstein and Holstein cross Brown Swiss dairy cattle

2006 ◽  
Vol 2006 ◽  
pp. 86-86
Author(s):  
G Wellwood ◽  
J K Margerison
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Milk Production ◽  
Milk Yield ◽  
Complex Disease ◽  
Economic Loss ◽  
Brown Swiss ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Holstein Friesian

Mastitis is a complex disease causing inflammation of the udder, which has been estimated to cost the dairy farmer between £40-£117/cow per year (Stott et al., 2002). Economic loss occurs as a result of discarded milk, reduced milk yield and milk quality, increased vet costs and an increase in replacement costs. The objective of this study was to examine the effect of breed on the incidence of mastitis and somatic cell counts and milk production capabilities of Holstein Friesian, Brown Swiss and Brown Swiss crossbred cows.

scholarly journals THE FACTORS AFFECTING MILK YIELD IN DIARY FARMING IN GREATER GUWAHATI REGION OF ASSAM

2021 ◽  
Vol 9 (08) ◽  
pp. 723-728
Author(s):  
Heman Sarmah ◽  
◽  
Jnanashree Borah ◽  
Tirthankar Sarma ◽  
◽  
...  
Keyword(s):  
Regression Analysis ◽  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Policy Maker ◽  
Production Cost ◽  
Relative Importance ◽  
Factors Affecting ◽  
Micro Level ◽  
Farming Households

The production of milk is conceived of several factors and a very multifarious process. The knowledge of relative importance of the resource inputs influencing in milk production is essential for the dairy farmer for introducing desirable change in his operation at micro level and for the policy maker for formulating plans for improvements in dairy cattle productivity based on sound economic principles at the macro level (Rao, 1985).The income level of the dairy household is determined by the production of milk they produce at their farms. Generally, the income of the dairy household increases when the milk production cost decreases or when the milk production increases .For this it is essential to study the factors which directly or indirectly effect the milk production. Household samples have been selected both from the municipal wards of Guwahati Municipal Corporation area. Out of 672 dairy farming households, 201 household have been selected for the survey. Regression analysis has been used for the study of factors affecting milk production in greater Guwahati region of Assam.

scholarly journals GENESIS AND PROSPECTS OF RED DAIRY CATTLE IN UKRAINE

2018 ◽  
Vol 51 ◽  
pp. 41-60 ◽  
Author(s):  
M. V. Gladiy ◽  
Yu. P. Polupan ◽  
I. V. Bazyshina ◽  
A. E. Pochukalyn ◽  
T. P. Koval ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Gene Pool ◽  
Milk Fat ◽  
Large Scale ◽  
Breeding Value ◽  
Simultaneous Increase ◽  
The Past ◽  
Breeding Farms ◽  
Dairy Breed

Ukrainian population of red dairy cattle is genetically active, its gene pool is significantly improved in each of the next generations, mainly due to artificial selection. Currently breeding structure of Ukrainian Red Dairy breed has the prospect of future expansion due to creating Podolian zonal type. Features of its formation are to use as the original breed, which being improved, Red Polish cattle. This breed, as Red Steppe cattle, was listed as a breed to preserve the gene pool under pure breeding. However, gene pool preservation of these breeds is impossible through lack of sufficient number of purebred bulls or their semen at breeding enterprises in Ukraine. The aim of our research was to study genesis and development prospects of red dairy cattle in Ukraine. Materials and methods of research. The materials of the research were the data of identifying breed composition of cattle in Ukraine by January 1, 2015, State Breeding List for 2005, 2010 and 2015, the electronic information database of leading breeding farms for 2007 and 2011 and database of bulls admitted to using during 2005, 2010 and 2015 of Institute of Animal Breeding and Genetics named after M.V. Zubets of NAAS. Results. Currently the group of cows of red breeds is about 365 thousand head, including 97.9 thousand head concentrated in agricultural enterprises. The largest share of this group takes the Red Steppe cattle (84.5%), the smallest one –Ayrshire and Angler breeds (0.7-0.8%). In Ukraine, the total number of Ukrainian Red Dairy cattle is about 40 thousand head, including 21.4 thousand head of cattle concentrated in agricultural enterprises. The results of these annual reports have shown that the average milk yield of the group of cows of red breeds was 3328 kg of milk in 2001. Then milk yield increased with each subsequent studied period and reached the highest figure of 4681 kg in 2014. So, increasing milk yield of cows was by 1353 kg of milk or 29% during fourteen years (2001-2014). The number of breeding animals of Red Steppe, Red Polish, Ayrshire, and Ukrainian Red Dairy breeds significantly decreased in the controlled part of population during the past fourteen years. However, level of milk production and quality increased slightly, except for Red Polish breed. Thus, 4688 cows of Ukrainian Red Dairy breed had milk yield in 5981 kg and milk fat content in 3.88% according to the appraisal of 2014, whereas, in 2013, 4902 cows had milk yield in 5837 kg with milk fat content in 3.86%. Up to 90% of the realized genetic progress in large-scale breeding is provided by using proven bulls, resulting most current need is to restore the national system of selection and testing of sires. The results show that during the past ten years, the number of proven bulls, admitted to using within the red breeds decreased almost seven times with a simultaneous increase 2.2 times in breeding value. Among 410 proven bulls, admitted to using in 2005 (bulls which being tested by progeny), unreasonably disproportionate share was for Holstein sires – 245 (59.8%), whereas, the share of bulls of the red breeds – 13.7%. In 2010, 123 bulls (65.4%) were of Holstein breed and only 9 ones (4.8%) – of Ukrainian Red Dairy among 188 bulls, admitted to using. In 2014, a similar situation was observed; there were 93 bulls, admitted to using, including 48 ones (51.6%) of Holstein and only 3 ones (3.2%) of Ukrainian Red Dairy breed. Given the current state of livestock breeding base on all the red breeds (Red Steppe, Ukrainian Red Dairy, Angler, Red Polish) we developed possible options of parameters of large-scale breeding. During the planning period the number of the controlled cows of the red breeds (mainly Ukrainian Red Dairy cattle) should be significantly increased. Calculations show that in the first stage of the program available number of cows in breeding farms, even if 30% of cows allocated to mating with laid-off bulls, is less than a third of the minimum at pressure of selection among laid-off bulls 1: 4 by productivity of 50 daughters. At the end of the program it is planned to increase the pressure of selection among laid-off bulls to 1:5 under increase of the controlled livestock number to 43700 cows (nearly 4.4 times against currently available one) Conclusion. Our results showed that, the number of breeding farms, in which were bred red cattle, significantly declined and the livestock number also decreased whereas milk production increased during 2001-2015. The high level of genetic potential of Ukrainian Red Dairy cows indicates the presence of highest-yielding cows with yield more than 10 000 kg of milk. At the same time, such animals at breeding farms for breeding Red Polish, Steppe, Ayrshire and Angler cattle weren’t found. During the past ten years, the number of proven bulls of red breeds, admitted to using, decreased almost seven times with a simultaneous increase of breeding value in 2.2 times. Predominance of Holstein bulls remains indisputable on reliability of assessment of breeding value. It causes the biggest request and the widest offer on the market of semen from bulls of the breed. The actual destruction of domestic system of sires breeding caused significantly lower rate of repeatability of breeding values in bulls of the red breeds. This is a concern and threatens possible loss or significant restriction of the gene pool of red breeds.

Effect of first 60-day cumulative milk yield on days open in Holstein dairy cows in Iran

2007 ◽  
Vol 2007 ◽  
pp. 148-148
Author(s):  
A. Heravi Moussavi ◽  
M. Danesh Mesgaran ◽  
T. Vafa
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Dairy Farm ◽  
Reproductive Efficiency ◽  
Root Cause ◽  
Principal Factors ◽  
Days Open ◽  
Holstein Dairy Cows

Reproduction and milk production are the principal factors that are influencing dairy farm profitability. The dairy industry in Iran has changed dramatically in the last decade. The shift toward more productive cows and larger herds in Iran is associated with a decrease reproductive efficiency (Heravi Moussavi et al., 2004). Increased knowledge about the principal causes of reduced fertility is essential. The root cause of the declining fertility is probably a combination of a variety of physiological and management factors that have an additive effect on reproductive efficiency. Dairy cattle are inseminated and pregnancy is established while dairy cows are lactating. Based on the analyses of large datasets, there is clearly an antagonistic relationship between milk production and reproduction in dairy cattle (Lucy, 2001). It was shown that the hazard ratio for cumulative first 60-day milk yield and conception in high producer cows was 8 percent less than the others and also high milk yield was a risk factor for several reproductive disorders (Grohn and Rajala-Schultz, 2000). The objective of this study was to evaluate the effect of first 60-day cumulative milk yield on days open in Iranian Holstein dairy cows.

Influence of Genetic Merit on Fertility Traits of Dairy Cattle on Commercial Farms

2002 ◽  
Vol 2002 ◽  
pp. 126-126
Author(s):  
H.C.F. Wicks ◽  
J.D. Leaver
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Body Condition Score ◽  
Potential Yield ◽  
Genetic Merit ◽  
Condition Score ◽  
Actual Yield ◽  
High Level ◽  
Daily Milk Yield

The selection of dairy cattle for high milk production is thought to be linked to increased problems with fertility. Most research has concentrated on the influence of actual yields rather than the effect of genetic merit on fertility. It has also been reported that by maintaining a high level of herd management the reproductive efficiency problems associated with high milk production can be removed (Nebel and Gilliard, 1993). The current work estimated the influence of genetic merit (defined as PIN95), 90-day daily milk yield, deviation from herd mean 305-day milk yield and body condition score on fertility, in an attempt to assess whether actual yield has more effect than potential yield as indicated by genetic merit.

Genetic line × concentrate level interactions for milk production and feed efficiency in dairy cattle

1992 ◽  
Vol 72 (2) ◽  
pp. 227-236 ◽  
Author(s):  
S. Wang ◽  
G. L. Roy ◽  
A. J. Lee ◽  
A. J. McAllister ◽  
T. R. Batra ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Feed Efficiency ◽  
Production Efficiency ◽  
Breeding Value ◽  
Environment Interaction ◽  
Genetic Line ◽  
Breeding Values ◽  
Concentrate Level

Early first lactation data from 2230 cows of five research herds of Agriculture Canada were used to study the interactions of genetic line by concentrate level, and sire by concentrate level and to estimate breeding values of sires. The genetic lines were defined as Holstein (H), Ayrshire (A), and H × A or A × H (C). The interactions of sire by concentrate level were studied separately using progeny of five different mating groups: G1, H sires mated to H cows; G2, H sires mated to H, A and C cows; G3, A sires mated to A cows; G4, A sires mated to H, A and C cows; and G5, C sires mated to C cows. The interactions of genetic line by concentrate were significant (P < 0.05) for 56- to 112-d milk yield (MY112), corrected 56-to 112-d milk yield (CMY112) and feed efficiency (EFMY112 = MY112/TDN consumption). H and C cows produced more milk and were more efficient than A cows when fed high levels of concentrate. The H cattle possess a greater capacity to convert the concentrate into milk, while A cattle reach maximum milk production earlier than H cattle. The interactions of sire by concentrate were statistically significant for MY112, EFMY112 and CMY112 in G1 (P < 0.01), and G2 (P < 0.01). The breeding values of sires for MY112 were estimated using BLUP for all of the H line (BLUP-T), for half of the population consuming low amounts of concentrate (BLUP-L) and for the other half consuming high amounts (BLUP-H). A significant reranking of sires was found among the three groups. Key words: Genotype × environment interaction, milk production, efficiency, breeding value, dairy cattle

scholarly journals Associations between milking technology, herd size and milk production parameters on commercial dairy cattle farms

2020 ◽  
Vol 70 (2) ◽  
pp. 103-111
Author(s):  
Dorottya Ivanyos ◽  
László Ózsvári ◽  
István Fodor ◽  
Csaba Németh ◽  
Attila Monostori
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Linear Models ◽  
Herd Size ◽  
Exact Test ◽  
Production Parameters ◽  
Daily Milk Yield ◽  
Cattle Farms ◽  
Daily Milk

The aim of the study was to survey the milking technology and to analyse the associations between milking parlour type, herd size, and milk production parameters on dairy cattle farms. The milking technology was surveyed by using a questionnaire in 417 Hungarian dairy herds with 177,514 cows in 2017, and it was compared with their official farm milk production data. The surveyed farms were categorized according to their size (1-50, 51-300, 301-600, and &gt;600 cows) and to their milking parlour types (herringbone, parallel, carousel, and others). The relationships were analysed by multivariate linear models, one-way ANOVA, and Fisher’s exact test. Pairwise comparisons were performed by Tukey’s post hoc tests. The prevailing type of milking parlour was herringbone (71.0 %), but on larger farms the occurrence of parallel and carousel parlours increased (p&lt;0.001). The number of milking stalls per farm increased with herd size (p&lt;0.001). Farms with herringbone parlour had significantly smaller number of milking stalls than that of parallel (p=0.022) and carousel (p&lt;0.001) parlours, and the cows were mostly milked two times, while in carousel milking parlours mostly three times a day. As the herd size increased, so did daily milk yield (p&lt;0.001) and daily milk production per cow (p&lt;0.001). Herd size was associated with somatic cell count (p&lt;0.001). The type of milking parlour showed significant association with daily milk yield (p=0.039) and dairy units with herringbone milking system had the lowest milk quality. Our findings show that herd size has greater impact on milk production parameters than milking technologies.

Production characteristics of the Jamaica Hope breed of dairy cattle

1970 ◽  
Vol 74 (3) ◽  
pp. 463-468 ◽  
Author(s):  
K. E. Wellington ◽  
P. Mahadevan ◽  
K. L. Roache
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Production Performance ◽  
Tropical Environment ◽  
Calving Interval ◽  
Considerable Potential ◽  
Production Characteristics

SUMMARYThis study is the first comprehensive estimation of breed parameters for the Jamaica Hope breed of dairy cattle. It has shown that the breed has considerable potential for milk production undser good husbendry in a tropical environment. Improvements in reproductive performance may be achieved, without prejudice to production performance, by using milk yield per day of calving interval (which has a moderatoly high repestability) as a criterion for selection.

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