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Excess Supplemental Choline for Swine

Louisiana State University Agricultural Center, Baton Rouge 70803

² To whom reprint requests should be addressed.

Abstract

Seven experiments were conducted with 280 crossbred pigs to investigate the effect of excess choline on rate and efficiency of gain of weanling, growing and finishing swine. Choline additions were made to a conventional corn-soybean meal diet. Daily gain of weanling pigs was reduced slightly by 6,000 ppm excess choline compared with 0, 500, 1,000, 2,000 or 4,000 ppm excess choline. Excess supplemental choline (2,000 ppm) fed throughout the weanling, growing and finishing (121 to 126 d) phases of growth reduced (P<.08) daily gain, but it did not affect (P>.10) feed utilization. The 2,000-ppm choline addition, however, did not affect (P>.10) pig gain when fed only during the growing and finishing stages of growth (68 to 86 d). Excess choline should be avoided in swine diets if maximum rate of gain is to be achieved.

¹ Dept. of Anim. Sci.

³ Present address: Dept. of Anim. Sci., Univ. of Arizona, Tucson, AZ 85721.

⁴ Dept. of Ext. Education.

⁵ Present address: Waseca Co. Ext. Office, 122 3rd Avenue NW, Waseca, MN 56093.