Effects of barley silage particle length and effective fiber on yield and composition of milk from dairy cows
2000
Kononoff, P.J. | Mustafa, A.F. | Christensen, D.A. | McKinnon, J.J.
A study was conducted to determine the effects of two theoretical lengths of particle (TLP) of barley silage on physically effective neutral detergent fiber (peNDF) content and on yield and composition of milk in dairy cows. Type I peNDF uses the neutral detergent fiber (NDF) of forage materials retained on a 1.18-mm screen while Type II peNDF is based on the NDF content of three different particle size fractions. Cows received diets consisting of 55% concentrate and 45% barley silage of either a 9.5-mm or 4.8-mm TLP. Results showed no difference in Type I peNDF between the two barley silage TLP. However, barley silage with a 9.5 mm TLP contained more (P < 0.05) Type II peNDF than barley silage with a 4.8 mm TLP. Differences in particle size or Type II peNDF content of barley silage had no effect on yield or composition of milk in dairy cows.
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