Evaluation of the feed intake models in the Nordic feed evaluation system NorFor

Sammanfattning

The objective of this study was to evaluate the feed intake models in the Nordic feed evaluation system NorFor. Data from 196 feeding experiments with dairy cows, and 17 experiments of periodical data, and 135 experiments of complete data with growing cattle were used in the evaluation by mixed model regression. The feed intake by both dairy cows and growing cattle were overestimated by the models. A linear bias indicated that over prediction increased with level of intake both by dairy cows and growing cattle. Most animal and diet factors were significantly related to the residuals, which indicated that those factors did not act independently in the predictions of feed intake. This kind of errors can restrict future ration formulation and animal performance, since animal production parameters included in the prediction models will be a consequence of the diet fed at the time they were measured.

Nyckelord

meta-analysis; metabolic; Cattle; dairy cow; prediction models; voluntary intake; physical

Publicerad i

Acta Agriculturae Scandinavica, Section A - Animal Science
2014, volym: 64, nummer: 2, sidor: 110-122
Utgivare: TAYLOR & FRANCIS AS

SLU författare

• Krizsan, Sophie Julie

  • Institutionen för norrländsk jordbruksvetenskap, Sveriges lantbruksuniversitet
    

• Höjer, Annika

  • Institutionen för norrländsk jordbruksvetenskap, Sveriges lantbruksuniversitet
    

• Hetta, Mårten

  • Institutionen för norrländsk jordbruksvetenskap, Sveriges lantbruksuniversitet
    

• Huhtanen, Pekka

  • Institutionen för norrländsk jordbruksvetenskap, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Husdjursvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1080/09064702.2014.929168

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/63567