| 摘要: |
| 【目的】 测定玉米、豆粕的蛋鸡净能值，为蛋鸡饲料原料净能值的客观评定提供参考。【方法】 采用交叉试验设计，将96只65周龄的健康来航蛋鸡，按照平均体质量相近的原则分为2个处理，通过消化代谢和呼吸测热试验，用差量法计算玉米、豆粕的蛋鸡净能值。【结果】 玉米和豆粕的蛋鸡表观代谢能值分别为(14.70±0.45）和(10.61±0.52) MJ/kg；饲喂玉米 豆粕日粮和单一玉米日粮的蛋鸡，其代谢体质量产热量分别为(485.21±33.31)和(483.03±34.06) kJ/(kg·d)；平均体质量为1.44 kg的蛋鸡，代谢体质量绝食代谢产热为（390.29±4.58）kJ/(kg·d)。【结论】 玉米和豆粕的蛋鸡净能值分别为（11.97±0.36）和（8.15±0.32） MJ/kg，玉米和豆粕代谢能转化为净能的效率分别为81%和77%。 |
| 关键词: 蛋鸡 玉米 豆粕 产热量 绝食代谢产热 表观代谢能 净能值 |
| DOI： |
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| 基金项目:动物营养学国家重点实验室开放基金项目(2004DA125184F0905)；陕西省科技攻关项目（2007K01-02-03） |
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| Measurement on net energy value of corn and soybean meal for laying hens |
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| Abstract: |
| 【Objective】 The study was conducted to establish a reasonable method for determining NE value of corn and soybean meal.【Method】 Crossover study design was carried out.A total of 96 65 week old White Leghorn hens were allotted into 2 groups with the principle of equal body weight,and each group was raised in respiration chamber for digestion metabolism experiment and measurement heat production.Net energy value of corn and soybean meal for laying hens was cultivated by dispersion method.【Result】 Apparent metabolizable energy (AME) value of corn and soybean in laying hens was （14.70±0.45) and （10.61±0.52） MJ/kg,respectively.Laying hens heat production (HP) of corn soybean diet and corn diet was (485.21±33.31) and (483.03±34.06) kJ/(kg·d),respectively.Fasting heat production (FHP) in laying hens with average body weight of 1.44 kg was （390.29±4.58）kJ/(kg·d).【Conclusion】 NE value of corn and soybean for laying hens was (11.97±0.36) and (8.15±0.32) MJ/kg,respectively.Conversion efficiency of AME to NE of corn and soybean was 81% and 77%,respectively. |
| Key words: laying hen corn soxbean heat production (HP) fasting heat production (FHP) apparent metabolizable energy(AME) net energy value (NEV) |
