Sammanfattning

Four mature Icelandic geldings were used in a balance trial to investigate the effect of stage of maturity of timothy (Pleum pratence L.) haylage fed at maintenance level on coefficients of total tract apparent digestibility (CTTAD), and nitrogen and energy metabolism in a 4 x 4 change-over arrangement of treatments. The content of fibre increased and crude protein content decreased with advancing stage of maturity. Very high CTTAD values were found for DM, OM, CP, CF, NDF and ADF in the first two cuts. Overall, there was a negative relationship between stage of maturity (p<0.05) and the CTTAD of all measured dietary components. Nitrogen (N) intake, N losses in urine and N balance were affected (p<0.05) by stage of maturity, while the N losses in the faeces were unaffected. There was a strong correlation (r(2) = 0.95) between N balance and water intake. Gross energy intake and losses in urine (as % of digestible energy intake) were unaffected by stage of maturity, while the energy balance was affected (p<0.05). The digestible energy content of the timothy haylage studied ranged from 14.1 to 9.0 MJ/kg DM.In conclusion, early-cut timothy haylage (stem elongation to flowering) has the energy content required to form the basis of diets for high-performing horses. Late-cut timothy haylage (seeding to late seeding), on the other hand, can be used to fulfil the energy and protein needs of maintenance-fed Icelandic horses. (C) 2007 Elsevier B.V. All rights reserved.

Nyckelord

Icelandic horses; haylage; timothy; digestibility

Publicerad i

Livestock Science
2008, Volym: 113, nummer: 2-3, sidor: 202-208
Utgivare: ELSEVIER SCIENCE BV

SLU författare

• Lindberg, Jan Erik

  • Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Husdjursvetenskap
Veterinärmedicin


Publikationens identifierare

DOI: https://doi.org/10.1016/j.livsci.2007.03.010

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/20744