Sonia  Arias, Angel Javier  Freddi, Ana Maria  Piazza, Martin Juan  Arzadun, Pamela Yanina  Giles, 
    Effect of Infrequent Wheat Pasture Supplementation on <i>In vivo</i> DM and
NDF Digestibility and Nitrogen Retention of Pregnant Beef
Cows Consuming Deferred Sorghum,
    Journal of Animal and Veterinary Advances,
    Volume 14,Issue 12,
    2015,
    Pages 351-356,
    ISSN 1680-5593,
    javaa.2015.351.356,
    (https://makhillpublications.co/view-article.php?doi=javaa.2015.351.356)
    Abstract: An <i>In vivo</i> study was performed using 8 British-breed, eighth-month gestating (420&plusmn;15 Kg of BW)
beef cows to determine the effect of infrequent wheat pasture supplementation on <i>In vivo</i> Organic Matter (OM)
and Nitrogen Detergent Fiber (NDF) digestibility and Nitrogen Retention (NR). Treatments consisted on
anunsupplementedcontrol (Deferred sorghum, DS) and DS plus fresh wheat forage (DSW) offered three times
per week. Cows were allotted in a completed randomized design for a period of 17 day. DS intake decreased
(p&lt;0.05) with CP supplementation, total OM Intake (OMI) was not different (p = 0.18) between treatments while
NDF intake was greater (p&lt;0.05) in DS than in DSW. Apparent total-tract OM Digestibility (OMD) was higher
(p&lt;0.05) in DSW than in DS and apparent total-tract NDF Digestibility (NDFD) did not differ among treatments.
N intake was greater in supplemented than in control cows. Feces and urine N did not differ between treatments
(p = 0.27) and NR was higher in DSW. NR expressed as percentage of N consumed was not different between
treatments. These results suggest that wheat pasture (18.4% PC and 45.6% NDF) can be used as CP supplement
for cows consuming low quality forage even if it is offered three times per week.
    Keywords: Low quality forage;digestibility;protein;nitrogen;cow;supplementation