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1
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Effect of daily yield of cows and date of first insemination on services per conception

100%
Sawa A., Jankowska M., Augustyniak A.
Acta Scientiarum Polonorum. Zootechnica
|
2018
|
tom 17
|
nr 1
2

Effect of first lactation yield on life performance of cows

86%
Sawa A.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2001
|
tom 04
|
nr 2
The studies were carried out on the population of 14215 cows. The first lactation yield, in kg of FCM, significantly differentiated both the yields of subsequent lactations and the indices of life performance of the cows. In high–production herds (with more than 5000 kg FCM), it is justifiable that the requirement should be met for heifer cows to reach the yield that would balance the costs of their rearing (5000–6000 kg of milk), as their high productivity during the first lactation positively influences their life performance, which is important especially from the perspective of the short period of productive life. In other herds, in the case of highly productive heifer cows, the lower the herd production level, the more intensive the following effects should be expected: decrease in the yield of subsequent lactations, lower overall life performance, fertility deterioration, lower number of born calves and shorter productive life.
3

The evaluation on heterosis effects on physiological blood indicators in dairy cattle ontogenesis

72%
Skrzypek R.
Animal Science. Scientific Papers of Agricultural University of Poznan
|
2003
|
tom 05
4

The diagnostic value of physiological blood traits tested in the lactating cows

58%
Animal Science. Scientific Papers of Agricultural University of Poznan
|
2003
|
tom 05
5

Effect of hind limb conformation on claw disorders in dairy primiparous cows

58%
Olechnowicz J., Jaskowski J., Nowak W.
Bulletin of the Veterinary Institute in Puławy
|
2010
|
tom 54
|
nr 3
The objective of this study was to determine the effect of hind limb conformation on claw disorders and locomotion in primiparous cows. The cows, housed in tie stalls (n=68) and in free stalls (n=74), calved throughout the year 2008. Rear legs set rear view, rear legs set side view, and foot angle scores were given in a scale from 1 to 9. Locomotion scores were defined in a scale from 1 to 5. Cows with healthy hooves had straight rear legs in rear view and lower scores for rear legs side view than cows with hoof disorders in hind limbs.
6

Wpływ czynników środowiskowych na wydajność mleczną krów rasy ncb i mieszańców ncb x hf

58%
Brzuski P., Szarek J., Parzelski S.
Acta Agraria et Silvestria. Series Zootechnica
|
1988
|
tom 27
7

Environmental factors and progeny affecting milk yield and composition during the first lactation

58%
Broucek J., Mihina S., Kisac P., Hanus A., Uhrincat M., Foltys V., Marencak S., Benc F.
Journal of Animal and Feed Sciences
|
2005
|
tom 14
|
nr 3
461-481
8

Wymiary wymienia i ich zwiazek z dzienna wydajnoscia mleka w pierwszej laktacji koz rasy bialej uszlachetnionej

58%
Bosek M., Pawlina E.
Acta Scientiarum Polonorum. Zootechnica
|
2003
|
tom 02
|
nr 1
3-11
9

Milk yield during the first lactation and its relationship with the productivity in consecutive lactations of Montbeliarde cows in the Czech Republic

58%
Kucera J.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Zootechnika
|
2004
|
tom 50
10

Relationship between certain parameters included in the glucose tolerance test in young heifers and their milk production traits in forthcoming lactation I

58%
Fiedorowicz S., Strzalkowska N., Bagnicka E., Jozwik A., Krzyzewski J., Reklewski Z.
Animal Science Papers and Reports
|
2008
|
tom 26
|
nr 2
The aim of the study was to establish the relationship between parametres included in the glucose tolerance test (GTT) of heifers aged 9-10 months and their subsequent milk yield and composition in lactation I. Used were 42 Holstein-Friesian heifers selected from the herd with a mean individual yield of 9600 kg milk/year with 4.32% fat and 3.44% protein. Over 24 hrs preceding the GTT the animals were offered only water and small amount of hay. After that time a “0” blood sample was withdrawn from each heifer and animals were infused intravenously with 40% water solution of glucose (the volume applied was equivalent to 1g glucose/kg W0.75). Then nine blood samples were withdrawn at 6 min intervals, and glucose and insulin contents of serum were determined.After calving, the heifers were maintained under uniform conditions and fed according to TMR system (INRA feeding standards) till the end of lactation I. Simple correlation coefficients were calculated between the area under the glucose and under insulin concentration curves (AGLUCC and AINSCC), ratio AGLUCC/AINSCC (GLIN combined index), maximum glucose concentration (GLUMAX) and maximum insulin concentration (INSMAX). Moreover, coefficients of regression were calculated of the GTT individual indicators on milk production traits and respective regression equations were derived. The GLIN index appeared to be the most suitable GTT parametre to predict future milk traits in dairy heifers. It can be anticipated that GTT may be employed in practical breeding work as an additional criterion of preliminary selection of heifers assigned for dairy herd replacement.
11

Estimates of genetic parameters of milk traits using REML and Gibbs sampling

58%
Ptak E., Bus M., Morek-Kopec M., Zarnecki A.
Journal of Animal and Feed Sciences
|
2001
|
tom 10
|
nr 4
12

Effects of crossbreeding with East-Friesian to Awassi on milk production and mammary gland traits

51%
Seker I., Kul S., Bayraktar M., Akcan A.
Medycyna Weterynaryjna
|
2004
|
tom 60
|
nr 08
815-818
13
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Porownanie poziomu cech produkcyjnych krow rasy hf importowanych z Niemiec z rowiesnicami krajowymi

44%
Czerniawska-Piatkowska E., Szewczuk M., Sowa A., Zychlinska-Buczek J.
Acta Scientiarum Polonorum. Zootechnica
|
2009
|
tom 08
|
nr 3
3-10
14

Genetyczne i fenotypowe parametry wydajnosci dobowej mleka, jego skladu i jakosci w kolejnych dniach pierwszej laktacji

37%
Neja W., Sawa A., Piwczynski D.
Acta Scientiarum Polonorum. Zootechnica
|
2005
|
tom 04
|
nr 2
85-95
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