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Fetal Resorption in Swine Caused by Leucaena Leucocephala (Lam.) De Wit. in the Diet¹

University of Hawaii, Honolulu

Abstract

One-hundred-forty gilts in five experiments were fed diets including as much as 12.5% fresh forage on an air-dry basis or 15% dehydrated leaf meal of LLLW during different parts of the reproductive cycle. When fed as 10 or 15% of the diet starting at flushing or breeding or fresh LLLW forage at the rate of 6.2 or 12.4% of the diet dry matter, the numbers of live fetuses at 37.3±1.8 to 48.7±2.2 days of gestation were significantly reduced with a reciprocal increase in resorbing fetuses. Significantly fewer live pigs were born at term to gilts fed a 15% LLLW diet than to control gilts. When LLLW was removed from the diet 15 or more days before breeding or 1% ferrous sulfate was added to a 15% LLLW diet reproduction was not significantly different from the controls. Polypodia of the forelimbs was found in young born to gilts fed 15% LLLW diets in experiment 1, and in fetuses from gilts fed fresh forage free-choice in experiment 3. It is recommended that LLLW be removed completely from the diet of breeding gilts or sows 14 to 30 days before they are to be bred.

¹ Journal Series No. 1055 of the Hawaii Agricultural Experiment Station.