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Feeding Value of Reconstituted and Finely Ground Sorghum Grain for Dairy Cows^{1 ,2,}

Department of Animal Sciences and Industry, Oklahoma State University, Stillwater 74074

ABSTRACT

Rations containing finely ground air-dry (90% dry matter), water-reconstituted (70% dry matter), and acid-reconstituted (70% dry matter, 2% organic acids) sorghum grain were compared in a switchback trial with 30 lactating dairy cows. Initial feed allowances met National Research Council requirements and were reduced 10% each period. Total milk yield, solids-corrected milk, and feed intake were not affected by grain treatment, but fat percentage in milk by cows fed water reconstituted grain was slightly higher. Apparent digestibility of ration components and efficiency of feed utilization were not affected by ration treatments. Ratios of ruminal volatile fatty acid and changes of body weight were also similar for all treatment groups. Acid-reconstituted sorghum grain was equal in feeding value to water-reconstituted and finely ground grain and showed no visible signs of mold growth after several weeks of storage.

¹ Journal article 3210 of the Oklahoma Agricultural Experiment Station, Stillwater.

² This research supported in part by a grant from Farmland Industries, Inc., Kansas City, MO.