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Seasonality in milk performance and reproduction of dairy cows in low-input farms depending on feeding system

100%

Frelich J. , Slachta M. , Szarek J. , Weglarz A. , Zapletal P.

Journal of Animal and Feed Sciences

2009

tom 18

nr 2

Seasonal variation in fatty acid composition of cow milk in relation to the feeding system*

86%

Frelich J. , Slachta M. , Hanus O. , Spicka J. , Samkova E. , Weglarz A. , Zapletal P.

Animal Science Papers and Reports

2012

tom 30

nr 3

The fatty acid (FA) composition of bulk milk fat was examined on three dairy farms applying the seasonal pasture and on two farms applying the permanently indoor silage feeding. The seasonal variation in the content of major FAs was investigated in relation to the effect of farm in each feeding system separately. Six samples in winter period and four samples in summer period were taken on each farm. In the grazing herds, the seasonal changes were found in FAs forming 90 g/100 g total FAs on average (P<0.05), generally without interactions with farm effect (P>0.05). Only several FAs, forming 14 g/100 g total FAs on average, were influenced by the season effect in the indor herds (P<0.05). The seasonal increase in unsaturated FAs against the saturated FAs and omega-3 against omega-6 polyunsaturated FA indicated that the milk yielded in summer was more beneficial to consumers’ health than that yielded in winter. No significant differences in these indicators of healthy milk were found compared to the milk yielded by herds kept indoors (P>0.05). The milk produced by grazing cows may be positively evaluated by consumers.

Aspekty hodowli krow mlecznych w podgorskich rejonach Republiki Czeskiej

86%

Frelich J. , Cermak B. , Slachta M. , Vavrowa L. , Zapletal P. , Szarek J.

Roczniki Naukowe Zootechniki. Suplement

2007

nr 23

27-31

Pasture cows nutrition in submounteens condition in Sumava region

72%

Cermak B. , Frelich J. , Slachta M. , Vavrova L. , Lad F. , Zapletal P. , Vondraskova B. , Weglarz A.

Prace i Materiały Zootechniczne

2009

tom 67

Quality of chosen herbal species from meadow and grazing herbage were evaluated. Dry matter, crude protein, ash, fat and fibre were analyzed. Herbage sampling was realized on three pastures of cattle with higher altitudes. Samples were compared with meadow herbage. Grass and herbage are the most natural and optimal feedstuff for cattle. Grazing management should notably regulate the pasture composition, i.e. support dominance of soft stoloniserous strains of grasses and decrease occurrence of weed and less value strain of gramineous grasses. The impact of grazing on milk performance and health of dairy cows was surveyed on sub-moun- tain farms. The higher milk, fat and protein yields were found in grazing season in comparison with winter confinement period.