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Intake and Digestibility of Corn Silages of Different Maturities, Varieties and Plant Populations^1,2,

University of Maryland, College Park

Abstract

Intake and digestibilities or corn silages of early and late maturing varieties which were grown in low and high plant populations and ensiled at low and high dry matter contents were studied with Holstein steers.

The silage dry matter ranged from 23.0% to 47.8%. No consistent difference occurred in intakes due to treatment. Dry matter and energy digestibilities were greater (P<.05) for the low dry matter silages. Low population corn silages had greater (P<.05) energy digestion coefficients. Protein digestion was consistently less for the high dry matter silages. None of the interactions studied were statistically different.

¹ Data taken from a thesis by H. K. Goering in partial fulfillment of the requirements for the M.S. degree, University of Maryland. Scientific Article No. A–1416, Contribution No. 4031 of the Maryland Agricultural Experiment Station.

² This work was supported in part by a research grant from the Dairy Cattle Research Branch, Animal Husbandry Research Division, A.R.S., U.S.D.A.

³ Present address: Dairy Cattle Research Branch, Animal Husbandry Research Division, Beltsville, Maryland.