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Journal of Dairy Science Vol. 85 No. 3 607-612
© 2002 by American Dairy Science Association ®
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Effect of Feeding a Corn Hybrid Selected for Leafiness as Silage or Grain to Lactating Dairy Cattle

P. W. Clark 1, S. Kelm 1, and M. I. Endres 2

1 Department of Animal & Food Science University of Wisconsin-River Falls, River Falls 54022-5001
2 Mycogen Seeds Eagan, MN 55121

A leafy corn hybrid was compared to a grain corn hybrid as silage and high moisture grain to evaluate dry matter intake, milk yield, and milk composition. Sixteen multiparous Holstein cows averaging 97 DIM were used in a feeding trial based on 4 x 4 Latin squares with 21-d periods. Each of four diets contained (dry basis) 8% chopped hay, 42% corn silage, 11% high moisture corn grain, 10% whole, fuzzy cottonseed, and 29% protein concentrate. One diet used leafy corn as both high moisture grain and silage. A second diet contained grain corn hybrid (control) as both high moisture grain and silage. A third diet contained leafy corn for high moisture grain and control corn for silage and the fourth diet used control corn for high moisture grain and leafy corn for silage. Cows fed diets containing leafy silage produced more milk and milk protein and ate more DM than cows fed control silage. The corn hybrid used for high moisture grain did not influence milk yield or composition. Dry matter intake was greater for cows fed the diet containing both leafy high moisture grain and leafy silage than for cows fed both control high moisture grain and control silage, but milk yield and composition were not different. When fed as silage, the leafy corn hybrid used in this experiment supported greater DMI as well as higher milk and protein yields when compared to the grain corn hybrid.

Key Words: corn silage • high moisture corn

Submitted on August 21, 2001
Accepted on November 5, 2001




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