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: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】産卵後の卵の鮮度が長期間維持される採卵鶏用飼料を提供する。【解決手段】飼料1kg中に、マグネシウム源をマグネシウムとして200mg以上、鉄源を鉄として10mg以上、亜鉛源を亜鉛として1mg以上含み、飼料の設定量をXadd[g]としたとき、マグネシウム源がマグネシウムとして20/Xadd質量%以上、鉄源が鉄として1/Xadd質量%以上、亜鉛源が亜鉛として0.1/Xadd質量%以上である採卵鶏用混合飼料。【選択図】なし
