Plasma constituents (wk 1 to 13). Plasma glucose,
total α-amino N, triglycerides, albumin, and NEFA
were similar among dietary treatments during wk 1 to
13 (Table 4). No differences were observed for plasma
urea N or essential, nonessential, and total AA (Tables
4 and 5), demonstrating that protein efficiencies and
balance of RUP and RDP for diets containing WCGF
and SHSL were similar to the C diet as expected because
of diet formulation. VanBaale et al. (2001) reported
that the inclusion of WCGF at 20% of dietary
DMdid not affect plasma total α-amino N, but observed
higher (P < 0.05) plasma urea in cows fed WCGF. De-
Frain (2002a) reported that SHSL increased (P < 0.05)
plasma total α-amino N but not total essential, nonessential,
and total AA. Dietary treatments did not affect
individual α-amino acids, except for phenylalanine,
which was lower (P < 0.01) in plasma from cows fed the
SHSL diet compared with cows fed the C diet
Plasma constituents (wk 1 to 13). Plasma glucose,
total α-amino N, triglycerides, albumin, and NEFA
were similar among dietary treatments during wk 1 to
13 (Table 4). No differences were observed for plasma
urea N or essential, nonessential, and total AA (Tables
4 and 5), demonstrating that protein efficiencies and
balance of RUP and RDP for diets containing WCGF
and SHSL were similar to the C diet as expected because
of diet formulation. VanBaale et al. (2001) reported
that the inclusion of WCGF at 20% of dietary
DMdid not affect plasma total α-amino N, but observed
higher (P < 0.05) plasma urea in cows fed WCGF. De-
Frain (2002a) reported that SHSL increased (P < 0.05)
plasma total α-amino N but not total essential, nonessential,
and total AA. Dietary treatments did not affect
individual α-amino acids, except for phenylalanine,
which was lower (P < 0.01) in plasma from cows fed the
SHSL diet compared with cows fed the C diet
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