English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Title of the paper: <b>The impact of nutrition and non nutrition factors on milk urea concentration. I. Theimpact of nutrition factors on milk urea concentration</b> The object of this study was to determine the impact of dietary crude protein / energy balance, stage of lactationparity, milk yield or milk protein yield, milk protein content, somatic cell count, season and herd on milk ureäconcentration under the conditions of large herds (50–1000 dairy cows) and routine milk yield recording. Fromthis data a model was created to predict the milk urea concentration for a single dairy cow or a feeding groupFor the analysis of the data a mixed linear model (proc mixed; SAS<sup>®</sup>, 1997) was used. The fixed effects (ratio ofcrude protein / energy, degradability of dietary crude protein, ruminal N-balance, lactation period, parity) wascomputed by generalized least-squares-means. The season, herd and month were used as random effects Milkyield or milk protein yield, milk protein content, somatic cell count and day in milk were included asCovariables in the model. The effect of dietary crude protein / energy balance on milk urea was significant (p <0.0001). For diets with an optimal ratio of crude protein / energy (according to GfE, 1997) 226 mg/1 wascalculated using least-squares-means. For diets with excess of crude protein this figure rose to 252 mg/1 In thisstudy a significant difference in least-squares-means calculated urea concentration did not existed fordegradability of dietary crude protein. On the other hand, a significant difference in least-squares-meanscalculated urea concentration existed for ruminal N-balance between 0 and 2

archives animal breeding/archiv für tierzucht

Fütterungs- und nicht fütterungsbedingte Einflüsse auf den Milchharnstoffgehalt von Milchkühen – 1. Mitteilung: Fütterungsbedingte Einflussfaktoren auf den Milchharnstoffgehalt von Milchkühen