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The Effect of Varying Levels of Hay and Corn Silage Consumption on Total Digestible Nutrient Intake and Milk Production¹

Department of Animal and Poultry Industry, University of Delaware, Newark

ABSTRACT

Conclusions:

1. The cows receiving orchard grass hay had a significantly lower intake of dry matter and total digestible nutrients than those fed the mixed clover and timothy.
   
2. The average daily intake of dry matter for the group fed mixed clover and timothy hay was the same at each level of silage feeding. For the group fed orchard grass hay the dry matter intake was the same at the two higher levels and about 1 lb. per cow per day less at the low level. This difference is not significant. There is no indication that silage feeding will offset the effects of hay of low palatability.
   
3. Changes in milk production are not significant in either group when allowance is made for normal lactation decline.
   
4. The loss in body weight in both groups at the 15-lb. silage level is not significant and may be due to less rumen "fill."
   

¹ The data were taken from a thesis submitted to the Graduate School of the University of Delaware by the senior author in partial fulfillment of the requirements for the M.S. degree. Misc. Publ. No. 236.

² Present address: Dover, Del.