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The Nutritional Value of High Moisture and Reconstituted Sorghum Grain for Swine^{1, 2, 3,}

University of Nebraska, Lincoln 68583

Abstract

A growing-finishing experiment involving 150 crossbred swine (replicated by time) and two metabolism experiments involving 36 crossbred barrows were conducted to determine the nutritional value of harvested high moisture (HMSG), reconstituted (RCSG) and dry sorghum grain (DSG) for swine. In Exp. 1, pigs fed HMSG diets gained the same, consumed similar amounts of feed, but less (P<.05) crude protein (equivalent dry matter basis) and had better (P<.05) feed conversion than pigs fed DSG diets. Dietary treatments for Exp. 2 were formulated with whole (WRCSG), rolled reconstituted sorghum grain (RRCSG) or DSG, balanced on an isonitrogenous dry matter basis. For Exp. 3, dietary treatments were WRCSG, HMSG and DSG diets balanced on an equivalent lysine and dry matter basis. The results of the metabolism experiments supported the improved feed conversion observed with HMSG in Exp. 1. In Exp. 2 and 3, pigs fed diets containing HMSG that had been stored in anaerobic structures consumed more (P<.02) digestible (DE) and metabolizable (ME) energy than did those fed DSG. In Exp. 3, N digestibility (ND) was higher (P<.02) in pigs fed WRCSG than in those fed the other two dietary treatments. Also for Exp. 3, dry matter digestibility, DE and ME intakes and energy digestibility were higher (P<.05) for WRCSG than for HMSG. Although pigs fed HMSG and WRCSG (Exp. 3) had a higher N balance (P<.01) than those fed DSG, the apparent biological value was not significantly different among the treatments, indicating that although fermentation enhances the ND of sorghum grain, it does not alter the efficiency by which the absorbed N is utilized.

¹ Published as Paper No. 7167, Journal Series, Nebraska Agr. Exp. Sta.

² Dept. of Anim. Sci.

³ The authors wish to thank the Arnold Schroder family of Palmyra, NE for their cooperation, hospitality and use of their facilities and the A. O. Smith Harvestore Co. for partial financial support of this research project.

⁴ Present address: Anim. Sci. Dept., Univ. of Missouri, Columbia.

⁵ Present address: Meat and Anim. Sci. Dept., Univ. of Wisconsin, Madison.