Age at First Calving
FACTORS AFFECTING AGE AT FIRST CALVING IN SAHIWAL CATTLE UNDER JHARKHAND RURAL CONDITIONS
... highest births (38.26%) were recorded in 2010, followed by 2011 (28.04%), 2009 (17.90%) and lowest in the year 2007 (4.03%). The birth year significantly affected AFC.Khan et al. (1999) and Javed et al. (2000) during ...
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Effect of Age at First Calving on First Lactation Milk Yield in Holstein Cows from Costa Rican Specialized Dairy Herds
... of age at first calving (AFC) at 305-d milk yield, a historical pros- pective longitudinal study of 46,029 pure specialized dairy Costa Rican Holstein animals was car- ried out between 2000 and ...
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Association between growth rates, age at first calving and subsequent fertility, milk production and survival in Holstein Friesian heifers
... both age at conception and growth rate and some studies have shown that a higher BW at calving has a positive effect on subsequent milk produc- tion ...at first calving, may cause increased ...
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Study regarding the influence of parity, age at first calving and farm management on the milk yield and composition in Romanian Black and White cows
... parity, age at first calving and farm management on the milk yield and milk composition in 421 Romanian Black and White cows from the South-eastern ...for age at first calving ...
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Effect of age at first calving on longevity and fertility traits for Holstein cattle
... cows first calved at the age of 23–32 ...cows first calved in high age had a tendency to shorter LPL and to worse fertil- ity than cows younger at the first calving, both trends ...
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Genomic association study for age at first calving and calving interval in Romosinuano and Costeño con Cuernos cattle
... Romosinuano (ROMO) and Costeño Con Cuernos (CCC) are two Colombian cattle breeds that are well adapted to the climatic conditions of the Caribbean region of Colombia and are characterized by having a high reproductive ...
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Estimation of Genetic and Phonotypic Trends for Age at First Calving, Calving Interval, Days Open and Number of Insemination to Conception for Isfahan Holstein Cows
... as age at first calving, calving interval, days open and number of insemination to conception rate the records of 63,866 cows including 167793 reproductive records were ...on calving ...
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FIRST CALVING AGE EFFECT ON MILK PRODUCTION OF FRIESIAN – ROMANIAN BLACK SPOTTED COW BREED IN TRANSYLVANIAN FARMS
... the first calving age effect on the phenotypic characteristics of the milk production in the first lactation and its economical implications in the improvement process of the Friesian – Black ...
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Evaluation of Relationship between Traits of Milk Production and Reproduction Traits in Dairy Cows of the Slovak spotted breed
... Mean age at first calving (AFC) in data set was ...months), age at second calving (ASC) was 1 ...and age at third calving (ATC) was 1 ...
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Factors Affecting Holstein Cattle Fertility Traits in the Slovak Republic
... at first calving, calving interval, days open, non return rate at 56, 72, and 90 ...cows first time calved in period 2000 and 2008 with three full- term ...Average age at first ...
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Analysis of Relationship between Production and Reproduction Traits of Holstein Cattle Population in the Slovak Republic
... inseminated first time early had greater total 305-d yields and greater persistency in first ...early first calving on milk production of Brown Swiss and Holstein Friesian ...the first ...
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Productive and reproductive performance and management practices of crossbreed dairy cows at jimma college of agriculture and veterinary medicine dairy farm, Ethiopia
... including age at first calving, calving-interval, days open, daily and total lactation milk yield, mortality, general management and major constraints to milk d for 10 years ...at first ...
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Studies on milk production and growth of Friesian x Bunaji crosses: 1 Dairy performance
... Summary The data analysed consisted of records on lactation length lL, total lactation yield fLY, estimated 305-day yield 305 DY, days dry DDRY, age at first calving AFC and calving inte[r] ...
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Factors affecting the functional length of productive life in Slovak Pinzgau cows
... the first lactation and at the end of subsequent ...the first and sub- sequent lactations cannot be correctly reflected by the ...model. Age at first calving is a factor of minor ...
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Analysis of the Management and Costs Associated with Rearing Pregnant Dairy Heifers in the UK from Conception to Calving
... the first lactation ...optimal age and size re- quires careful attention to detail particularly in the areas of nutrition, reproduction and health ...in age at first calving (AFC) [4] ...
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Genetic analysis of longevity data in the UK: present practice and considerations for the future
... of first calving, month of first calving, age at first calving (covariate) and the deviation of first lactation milk yield from the herd mean (covariate) for the ...
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Techno Economic Factors Affecting Genetic Investment in Dairy Cattle in Egypt
... are age at first calving, service period, calving ...cow age and milking season order (Mashhour, ...the first caving of the daughter, (Blake, 1989) and (McMahon, ...costs, ...
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Reproductive Characterization of The Bovine Lidia Called “Brava Dos Açores”
... mean age of the breeding herd, the number of calving’s, the average age at first calving, the apparent fertility rate, and the actual fertility rate, as well as the calving ...
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Comparative Productive And Reproductive Performance Of Holstein Friesian And Jersey Crossbred Cows In Humid Sub-Tropics Of Chitwan Under Farmer’s Managed Condition
... The Least square means of Age at First Calving (AFC) inclusive of SE was presented in Table 2. Analysis of Variance showed there is no significant difference (p>0.05) on AFC between both genetic ...
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The effect of growth and development intensity in replacement heifers on economically important traits of Holstein cattle in the Czech Republic
... The cost of rearing replacement heifers can be re- duced by accelerating the growth rate and by earlier breeding, thus decreasing the age at first calving (Hoffman et al., 1996). However, the ...
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