As shown in Table 5, neither the type of TMR nor the
type of WCS supplementation had any influence on milk
yield, milk composition, or feed efficiency (p>0.05). A
similar result was observed by Vasupen et al. (2006) who
reported that production and composition of milk were
unaltered by FTMR feeding.
cWCS supplementation did not alter milk yield, milk
composition and feed efficiency (p>0.05), which was to be
expected as DMI was not affected, as also reported by
Beede and Collier (1986). Brown et al. (1982) and Santos et
al. (2002) found that yields of milk and milk components
were similar between cows fed diets of whole Pima
cottonseed and cracked Pima cottonseeds. However, milk
fat of the cows supplemented with cWCS was lower than
that of the cows supplemented with WCS. Hawkins et al.
(1984) observed a decrease in milk fat percentage with
ground seed compared to whole seed, probably because of a
more rapid release of oil from the ground seed. In general,
supplemental fat decreases fat percentage in milk (Dhiman
et al., 2000); however, these reductions would seem to be
due to the highly unsaturated fatty acid sources affecting
rumen fermentation. Jenkins and Palmquist (1983) found a