書誌事項
- タイトル別名
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- Effects of Noise on Growth, Egg Laying and Mineral Contents of Egg Shell in Hens
- ニワトリ ノ ハツイク サンラン ナラビニ ランカク ノ ムキシツ ガンリョウ
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Experiments were carried out to elucidate the effects of noise on the growth of chicks and egg laying in hens. Twenty chicks were raised in a sound-proof room illuminated all day long. At two weeks of age, they were divided into two groups: a control group(C) and a noise-load-ed group(N). The latter group was loaded with noise of 70-75 phon, recorded from highway traffic, every other hour for 21 weeks. 1. Mean body weights was lower in group N than in group C in each week of the noise-loaded period. The difference between the two groups increased gradually to 147g in 20 weeks of age. 2. Body weight of one to four in group N was usually below the lower critical limits of body weight in group C. 3. First egg laying appeared a little later in group N than in group C. 4. The average rate of egg laying was lower in group N than in group C every week during the noise-loaded period. The largest difference was 20 per cent. 5. There were no significant differences in the contents of calcium, magnesium and phosphorous in the egg shell. 6. After noise-loading ended, body weight and egg laying in group N approached those in group C.
収録刊行物
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- 日本畜産学会報
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日本畜産学会報 57 (2), 83-88, 1986
公益社団法人 日本畜産学会
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詳細情報 詳細情報について
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- CRID
- 1390282680170140032
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- NII論文ID
- 130000739793
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- NII書誌ID
- AN00195188
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- ISSN
- 18808255
- 00215309
- 1346907X
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- NDL書誌ID
- 3072810
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可