FEED FOR LAYING HENS, MIXED FEED FOR LAYING HENS, AND METHODS OF SUPPRESSING FRESHNESS DETERIORATION OF EGGS OF LAYING HENS

摘要

PROBLEM TO BE SOLVED: To provide feed for laying hens by which the freshness of eggs after egg-laying is maintained for a long period of time.SOLUTION: A mixed feed for laying hens contains 200 mg or more of a magnesium source as magnesium, 10 mg or more of an iron source as iron and 1 mg or more of a zinc source as zinc, in 1 kg of the feed. When the preset value of the feed is Xadd [g], 20/Xadd mass% or more of the magnesium source as magnesium, 1/Xadd mass% or more of the iron source as iron, and 0.1/Xadd mass% or more of the zinc source as zinc are contained.SELECTED DRAWING: None