J. Anim Sci.
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J. Anim Sci. 1987. 64:1051-1059.
© 1987 American Society of Animal Science
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Glandless Cottonseed Kernels for Starter, Grower and Finisher Swine1

D. C. La Rue, D. A. Knabe, R. S. Izard and T. D. Tanksley, Jr.

Texas A&M University, College Station 77843

Abstract

The feeding value of raw and processed glandless cottonseed kernels (GK) were evaluated in three growth trials with starter pigs and one growth trial with growing-finishing pigs. The three sources of GK used in these trials averaged 35% protein, 34% oil and 1.35% lysine. All diets were based on corn and soybean meal. The GK were substituted for soybean meal and corn to provide about one-half of the non-corn protein in the test diets, and lysine HC1 was added to obtain dietary lysine contents equal to or greater than those of the control diets. The addition of GK did not affect gains or feed efficiency of starter pigs. Similarly, gains of growing-finishing pigs were not affected by the addition of GK, but feed efficiency was improved (P<.05). Increasing the lysine content of GK diets to provide the estimated metabolizable energy-to-lysine ratio of the control diets improved (P<.05) the feed efficiency of growing-finishing pigs by 5% but did not affect performance of starter pigs. Feed efficiencies on GK diets tended to be worse than feed efficiencies obtained on corn-soybean meal-based diets with added lipid, suggesting that the oil in GK is not utilized effectively. Neither cold-pelletting, autoclaving (104 C for 20 min), nor dry-extrusion affected the feeding value of GK for starter pigs. Dry extrusion also had no effect on the feeding value of GK for growing-finishing swine.

Footnotes

1 T.A. 21813. Dept. of Anim. Sci., Texas Agr. Exp. Sta. Gratitude is expressed to Cotton, Inc., Raleigh, NC, for financial support of these trials.

2 California Master Pellet Plant, model 2288.






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Copyright © 1987 by the American Society of Animal Science.