| 公鸡和母鸡氮代谢及氮维持需要量的比较研究 |
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| 引用本文： | 宋春玲,魏秀莲,马秋刚,计成.公鸡和母鸡氮代谢及氮维持需要量的比较研究[J].中国畜牧杂志,2007,43(5):15-18. |
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| 作者姓名： | 宋春玲 魏秀莲 马秋刚 计成 |
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| 作者单位： | 1. 中国农业大学动物科技学院,北京,100094
2. 北京市饲料检察所,北京,100107 |
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| 摘 要： | 试验采用氮平衡试验研究产蛋高峰期罗曼公、母鸡的氮维持需要量(Nm),并分析公、母鸡氮代谢的变化规律。试验选取27周龄健康的公、母鸡各30只,分别分为5个处理,每处理6个重复,每个重复1只试鸡,对公、母鸡分别饲喂5个不同粗蛋白质水平的试验日粮。结果表明:相同蛋白水平处理组的公鸡氮食入量和氮沉积率均高于母鸡的结果。母鸡和公鸡的氮食入量(NI)与氮沉积量(NB)间的回归方程分别为NB=0.3743NI-0.1589(R2=0.79)和NB=0.6228NI-0.3151(R2=0.85)。母鸡和公鸡的氮维持需要量分别为每天0.4245g和0.5059g;每千克体重0.2364g和0.2754g;每千克代谢体重0.2739g和0.3208g。
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| 关 键 词： | 氮代谢 维持需要 罗曼公、母鸡 |
| 文章编号： | 0258-7033(2007)05-0015-03 |
| 修稿时间： | 2006-04-06 |
A Comparative Study on Nitrogen Metabolism and Nitrogen Requirement for Maintenance in Roosters and Layers Fed Antibiotic-free Diets |
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| SONG Chun-ling,WEI Xiu-lian,MA Qiu-gang,JI Cheng.A Comparative Study on Nitrogen Metabolism and Nitrogen Requirement for Maintenance in Roosters and Layers Fed Antibiotic-free Diets[J].Chinese Journal of Animal Science,2007,43(5):15-18. |
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| Authors: | SONG Chun-ling WEI Xiu-lian MA Qiu-gang JI Cheng |
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| Institution: | 1.College of Animal Science, China Agricultural University, Beijing 100094, China; 2.Institute of Beijing Feed Supervision, Beijing 100107, China |
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| Abstract: | The nitrogen requirement for maintenance(Nm) was determined by nitrogen balance. 30 Lohmann Brown adult roosters and 30 layers of 27-week-age, were randomly divided into five groups for six replicates per group, which consisted of one bird. And all birds were fed with five different CP level diets respectively. The trial was conducted to study the effect of different protein level on the nitrogen retention and investigate the rule of nitrogen metabolism for Roman roosters and layers. The results indicated that the nitrogen intake and nitrogen retention efficiency for roosters were higher than those of laying hens. The regression equations of daily N gain(NB, protein accretion) v. daily N intake (NI) for layers and roosters were NB=0.3743NI-0.1589 (R2=0.79) and NB=0.6228NI-0.3151 (R2=0.85), respectively. Nitrogen maintenance requirement for Lohmann Brown roosters and laying hens at 27-week-age were 0.4245 g/per day and 0.5059 g/per day, 0.2754 g/kg and 0.2364 g/kg based on the average body weight (BW), 0.3208 g/kg and 0.2739 g/kg based on metabolic body weight (BW0.75). |
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| Keywords: | nitrogen balance trial maintenance requirement roosters and layers |
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