Effects of dietary Crotalaria pallida seeds on the health and performance of laying hens and evaluation of residues in eggs |
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Authors: | Gonzalo J Diaz Leidy X Almeida Dale R Gardner |
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Institution: | 1. Laboratorio de Toxicología, Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá, Colombia;2. ARS, Poisonous Plant Research Laboratory, USDA, 1150 E. 1400 N., Logan, UT 84341, USA |
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Abstract: | The effect of three dietary concentrations of Crotalaria pallida (C. pallida) seeds (0, 1, 2, and 3% w/w) of their normal diet were investigated in commercial laying hens during a 35 day feeding trial. All concentrations of C. pallida decreased body weight and feed intake (P < 0.05). Egg mass production and average egg weight were decreased by feeding of ≥2% C. pallida seeds (P < 0.05). All concentrations of C. pallida increased relative lung weight and serum activity of ALT, AST and LDH (P < 0.05); 3% C. pallida seeds decreased liver weight (P < 0.05). Analysis of the C. pallida seeds for dehydropyrrolizidine alkaloid content detected usaramine and its N-oxide at a total alkaloid concentration of 0.18% (dry weight). Usaramine was also detected in the eggs of all hens fed C. pallida seeds. |
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Keywords: | Crotalaria pallida Pyrrolizidine alkaloids Usaramine Eggs Laying hens |
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