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Relation between Dry Matter Content and Dry Matter Consumption of Sorghum Silage ¹

Departments of Dairy-Poultry Science and Animal Husbandry, Kansas State University, Manhattan

J. R. Brethour

Fort Hays Branch Experiment Station, Hays, Kansas

ABSTRACT

Average ad libitum consumption of 19 sorghum silages by lactating cows and by beef calves at one station and 21 silages by beef calves at another station were closely correlated with dry matter percentages of the silages. The silages were prepared in 5 yr from seven varieties, with various treatments including a small proportion of grain, ground heads, wilted forage, and added carbohydrates. Beef calves, 10 or 12 per group, were group fed ad libitum silage and protein supplement. Lactating cows were fed ad libitum silage and concentrate in three replicate 4 x 4 Latin squares each year, except one year in which only three silages were used. Correlation coefficients for the relationship between average silage dry matter intake, adjusted for concentrate consumption, and percentage silage dry matter were .95, .93, and .93, respectively, for lactating cows and beef heifers at one station and beef steers at the other.

¹ Contribution no. 631, Department of Dairy and Poultry Science; Contribution no. 340, Department of Animal Husbandry; Contribution no. 205, Fort Hays Branch Experiment Station, Kansas Agricultural Experiment Station.