 | Abstract 423The use of cotton seed meal in the diet of laying hens.Pourreza,-J; Keshavarz,-K College of Agriculture, Shiraz Univ., Shiraz, Iran. Iran-Agricultural-Research. 1982, 1: 2, 134-145; 20 ref. Experimental results showed that laying hens could tolerate free gossypol at up to 440 mg/kg diet without any significant adverse effect on egg production, egg weight, feed intake and feed conversion efficiency. Supplementation of diets containing free gossypol with FeSO4 did not improve egg production, egg weight and feed conversion efficiency. Free gossypol at 140 mg/kg feed had no effect on colour of egg yolk or egg white in fresh eggs but caused discoloration in eggs stored for 1 month or longer. FeSO4 at 120 or 240 mg/kg feed increased the tolerance to free gossypol to 280 mg/kg feed, and slightly decreased the occurrence of discoloration in stored eggs. This abstract relates to the following species: |