Tolerance Levels of Seleniferous Grains in Laying Rations

Abstract

LOW hatchability of eggs produced in certain sections has been closely associated with the selenium content of the grains used in the laying rations. As reviewed by Moxon (1937), selenium has been found in the soils of at least 12 states of the Great Plains and Rocky Mountain areas, as well as in some foreign countries, and is often taken up by certain plants and grains and used in live stock feeding. That considerable harm may arise from continuous use of selenium in the diet has been pointed out. Investigations having a particular bearing upon the experiments reported herein include the reports of Franke and Tully (1935), Tully and Franke (1935), and Poley et al (1937).The objectives of this experiment were to determine:1. The amount of selenium, laying hens will tolerate without affecting hatchability.2. Whether or not levels of selenium too small to reduce hatchability might affect .