scholarly journals Influence of the age of first insemination and first calving in Holstein – Friesian heifers on farm economic efficiency

2020 ◽  
Vol 12 (4) ◽  
pp. 379-383
Author(s):  
K. Stankov
Keyword(s):  
Milk Yield ◽  
Economic Efficiency ◽  
Economic Performance ◽  
High Yield ◽  
Milk Productivity ◽  
Holstein Friesian ◽  
Younger Age ◽  
The Cost ◽  
On Farm ◽  
Friesian Cattle

Abstract. The present study aims to assess the influence of the age of first insemination and first calving in Holstein-Friesian heifers on the cost of breeding and the cost of their marketing as breeding animals. For this purpose, a study was conducted on 7 farms (A, B, C, D, E, F, G) situated in Central and Southern Bulgaria in which Holstein-Friesian cattle are bred. The results of the study indicated that the age of first insemination in the controlled farms was 17.2 months on average, and the age of first calving (AFC) was 26.6 months, which was within the established norms for the Holstein-Frisian breed raised in the country. The heifers from farm A, which entered breeding age the earliest (at 16 months), as well as the age of first calving (25.3 months) had the longest utilisation period – 4.9 lactations. However, they did not develop the highest milk yield either and the economic performance from their raising was low. The heifers on farm F, with age of first insemination of 17.3 months, and first calving age of 26.8 months, and the ones from farm G, with ages 17.4 and 26.6 months, respectively, developed maximum milk yield per lactation. The expenses for raising a heifer of the Holstein-Frisian breed varied from BGN 1922 up to BGN 2389, with an average sum of cost for the studied farms amounting to BGN 2123. This indicated that the raising of heifers from a high-yield breed was an expensive undertaking, but when taking the necessary care for their breeding at a younger age during the period of use they developed higher milk productivity.

Relationships among udder type traits and milk yield of Iranian Holstein-Friesian cattle

2003 ◽  
Vol 2003 ◽  
pp. 141-141
Author(s):  
M. R. Sanjabi ◽  
M. G. Govindaiah ◽  
M. M. Moeini
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Genetic Correlations ◽  
Holstein Friesian ◽  
Type Traits ◽  
High Production ◽  
Friesian Cattle

Correlation among type traits and with milk production has been investigated by Brotherstone (1994) and Misztal et al (1992). One of the primary reasons for collecting and utilizing information on type traits is to aid breeders in selecting profitable functional cows for high production and suitable herd life. The objectives of this study were to estimate phenotypic and genetic correlations among milk production and with udder traits.

scholarly journals A comparison of different methods of estimating sire transmitting ability of some milk traits in a herd of Holstein Friesian cattle

2000 ◽  
Vol 43 (2) ◽  
pp. 115-122
Author(s):  
H. Atil ◽  
A. S. Khattab
Keyword(s):  
Least Squares ◽  
Milk Yield ◽  
Lactation Period ◽  
Milk Traits ◽  
Linear Unbiased Prediction ◽  
Age At First Calving ◽  
Holstein Friesian ◽  
Genetic And Phenotypic Correlations ◽  
Best Linear Unbiased ◽  
Friesian Cattle

Abstract. A total of 1931 normal first lactation records of Holstein Friesian cows kept at Dena Farm in Egypt during the period from 1987 to 1994 were used to estimate phenotypic and genetic parameters for 90 day milk yield (90 dMY), 305 day milk yield (305 dMY) and lactation period (LP). In addition, 76 bulls with at least ten daughters were used to compare three methods of sire transmitting ability. A least Squares analysis of variance show significant effect of month and year of calving and age at first calving for different traits studied, except the effect of age at first calving on LP. Heritability estimates for 90 dMY, 305 dMY and LP were 0.39 ± 0.08, 0.27 ± 0.07 and 0.14 ± 0.05, respectively. Genetic and phenotypic correlations between different traits were positive and significant. Sires with at least ten daughters were evaluated by best linear unbiased prediction (BLUP), least Squares means (LSM) and regression of the future daughters mean on the present daughters mean. The product moment correlations between different traits studied were positive and high (= 0.96).

scholarly journals Season of birth is associated with first-lactation milk yield in Holstein Friesian cattle

animal ◽  
2017 ◽  
Vol 11 (12) ◽  
pp. 2252-2259 ◽  
Author(s):  
M. Van Eetvelde ◽  
M.M. Kamal ◽  
L. Vandaele ◽  
G. Opsomer
Keyword(s):  
Milk Yield ◽  
Season Of Birth ◽  
Holstein Friesian ◽  
Friesian Cattle

THE EFFECTS OF DAYS DRY AND DAYS OPEN ON THE MILK AND BUTTERFAT PRODUCTION OF HOLSTEIN-FRIESIAN CATTLE

1967 ◽  
Vol 47 (1) ◽  
pp. 85-90 ◽  
Author(s):  
J. W. Wilton ◽  
E. B. Burnside ◽  
J. C. Rennie
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Holstein Friesian ◽  
Dairy Animals ◽  
Days Open ◽  
Friesian Cattle ◽  
Selection Of

The effect of days dry and days open on first, second and later lactation production was examined by intra-sire-herd-season regression. Neither variation in days dry nor days open accounted for more than 1% of the within-sire variance in fat test. Variation in preceding days dry accounted for 4.8% of the within-sire variance in milk production in second lactations but only 0.6% of the variance in later lactations. Differences in days open accounted for 4.5, 3.5, and 4.5% of the intra-sire variance in milk production in first, second, and later lactations, respectively. The effects of days dry and days open on fat production were, in all cases, slightly less than the effects on milk production. Heritabilities for both traits were low, indicating that the effects of both days dry and days open on production were largely of an environmental nature. Adjustment of milk yield for the number of days cows are open could lead to more accurate selection of dairy animals.

THE GROWTH AND ECONOMIC PERFORMANCE OF PRECONDITIONED CALVES AND THEIR DAMS ON THE FARM AND OF CALVES IN THE FEEDLOT

1987 ◽  
Vol 67 (2) ◽  
pp. 327-336 ◽  
Author(s):  
D. B. KARREN ◽  
J. A. BASARAB ◽  
T. L. CHURCH
Keyword(s):  
Weight Loss ◽  
Economic Performance ◽  
Calving Interval ◽  
Early Weaning ◽  
Treatment Rate ◽  
Beef Calves ◽  
Health Performance ◽  
Cow Calf ◽  
The Cost ◽  
On Farm

A study was conducted to evaluate the effects of preconditioning beef calves. In 1982, each of two producers allocated 100 cow-calf pairs to the study while in 1983, 130 cow-calf pairs were included on Farm 1 and 151 on Farm 2. In 1982, approximately even numbers of cow-calf pairs were randomly assigned to either a preconditioning (PC) or a regular (RG) program. These same groups were maintained in 1983. The length of the period from early weaning to shipment (preconditioning period) was 30 d (PC30) in 1982 and either 30 or 42 d (PC42) in 1983. At the end of the preconditioning period, calves from both farms were shipped to the same feedlot for 68- and 95-d tests in 1982 and 1983, respectively. PC calves gained faster than RG calves during the preconditioning period in five of the six farms by year by treatment situations. Preconditioning calves for 42 d rather than 30 d had no effect on either preconditioning gain or farm to feedlot weight loss. The cost of preconditioning ranged from $29.65 to $38.77 head−1 for PC30 calves and from $41.95 to $49.08 head−1 for PC42 calves. The price differential required by the cow-calf producer to break-even on PC calves ranged from + 5.0C kg−1 for PC30 calves to + 11.0C kg−1 for PC42 calves. Weaning treatment had no effect on either pregnancy rate the following year or on calving interval. In 1982 RG calves gained 0.13 kg d− more in the feedlot than PC30 calves. In 1983 PC30, PC42 and RG calves gained similarly. Treatment for illness of PC30 calves during the feedlot phase was 13.7% lower than RG calves in 1982. In 1983, treatment rate was reduced 42.0% for PC30 calves and 60.6% for PC42 calves. Preconditioning for 42 d rather than 30 d had no effect on feedlot growth or health performance. Cost of gain was 5.0C kg−1 less for PC calves than for RG calves in both 1982 and 1983. Key words: Calves (beef), weaning (early), preconditioning, farm, feedlot

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