| 日粮锰水平对蛋鸡生产性能的影响 |
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| 引用本文： | 袁建敏,呙于明,吴四朝.日粮锰水平对蛋鸡生产性能的影响[J].中国畜牧杂志,2000,36(1):14-16. |
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| 作者姓名： | 袁建敏 呙于明 吴四朝 |
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| 作者单位： | 中国农业大学动物科技学院,北京,100094 |
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| 摘 要： | 试验用北京红鸡商品代分两阶段２５ ～３８ 周龄和４９ ～５７ 周龄研究玉米－ 豆粕型基础日粮含锰２０ｍｇ／ｋｇ 的情况下，以一水硫酸锰形式添加锰２０ｍｇ／ｋｇ 、４０ｍｇ／ｋｇ、６０ｍｇ／ｋｇ 和蛋氨酸锰２０ｍｇ／ｋｇ 对蛋鸡生产性能及蛋壳、蛋黄锰存留的影响。结果表明：不同锰源及添加水平对蛋鸡生产性能、蛋壳品质、蛋形指数在各组间无显著差异（Ｐ＞ ０ ．０５） ，蛋壳锰含量呈负增长，有机锰组蛋壳锰含量低于无机锰组。蛋黄锰含量却呈现正增长，以蛋氨酸锰组最高，显著高于添加２０ｍｇ／ｋｇ 锰组和不添加组。由此说明锰在蛋壳和蛋黄中存留呈现相反的结果。
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| 关 键 词： | 蛋鸡 锰 添加量 生产性能 蛋壳品质 蛋壳锰存留 |
Effects of Dietary Manganese Levels on Performance of Laying Hens |
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| YUAN Jian-min,GUO Yu-ming,WU Si-chao.Effects of Dietary Manganese Levels on Performance of Laying Hens[J].Chinese Journal of Animal Science,2000,36(1):14-16. |
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| Authors: | YUAN Jian-min GUO Yu-ming WU Si-chao |
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| Abstract: | Beijing Brown layers at 25～38 and 49～57 weeks of age were randomly allotted into four treatment groups to study the effects of dietary manganese levels on preformance.A maize and soy-bean meal basal diet containing manganese 20 mgkg\+\{-1\} was supplemented Mn with 20、40 and 60 mgkg\+\{-1\} from manganese sulfate and 20 mgkg\+\{-1\} from Mn-Met.No significant differences in laying rate,egg weight,daily feed intake,feed conversion,shell breakage,shell deformation rate,shell breaking strength,shell thickness and Percentage shell were observed when the supplementation of manganese in the diet increased from 20 to 60 mgkg\+\{-1\} .The concentration of Mn in shell decrease as Mn increased in the diet,But raised in yolk.This suggests Mn from Mn-Met can be absorbed more easily than from manganese sulfate.Addition of Mn 20mgkg\+\{-1\} is adequate for laying hens with normal performance. |
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| Keywords: | Key words:Layers Mn levels Laying performance Egg shell quality Mn in egg shell Mn in egg yolk |
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