Soybean Oil Meal as a Protein Source for Successive Generations of Swine

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Abstract
Groups of swine, confined to dry lot, were fed rations containing all-plant or plant and animal products through the farrow of fourth generation pigs. Supplemental protein was supplied in complete rations as either soybean oil meal or a combination of soybean oil meal and meat and bone scraps. A total of 755 pigs were farrowed during the three-year period. Satisfactory performance was maintained on both ration treatments. Breeding performance, fetal weight at mid-gestation, lactation performance (including livability and growth of pigs to weaning) and growing-finishing performance did not appear to be effected by the type of ration fed. The continuous feeding of rations containing both plant and animal products resulted in a highly significant increase in birth weight (P<0.01) and greater average vigor at birth in pigs farrowed by second and third generation females. A high incidence of late prenatal death loss was observed in one group of second generation gilts fed all-plant rations. Second farrowing performance of the same females appeared normal in all respects. From observations during the three-year period there apparently was no decline in performance either from ration treatment or as a result of continual confinement on concrete. Copyright © . .

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