Five studies were conducted to determine the effect of inoculating (Pioneer Sila-Bac 11H50RTM) on the silage quality and the feeding value of high DM (55.3 %) alfalfa silage. The inoculant contained multi strains of Lactobacillus plantarum developed by Pioneer Hi-Bred Inc. In the first study, the effects of inoculation on ensiling characteristics of alfalfa were determined in a completely randomized design using 30 mini-silos. In the 2nd study, 9 containers were used in a completely randomized design to determine the effect of inoculation on the aerobic stability of alfalfa silage. In the 3d study, 2 ruminally fistulated cows were used in a randomized complete block design to determine the effects of inoculation on ruminal degradation of alfalfa silage. In the 4th study, 4 ruminally fistulated cows were used in a switch back experiment to determine the effects of feeding inoculated alfalfa on total tract nutrient utilization. In the last study, 27 Holstein cows in early lactation were used in a randomized complete block design to determine the effects of feeding inoculated alfalfa on intake, milk yield, and milk composition.

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