不同模式偏热环境对肉鸡氮代谢与生产性能的影响

doi:10.11843/j.issn.0366-6964.2016.03.014

Abstract

Abstract:

The aim of this study was to research the effects of constant temperature and diurnal cyclic temperature on nitrogen metabolism and performance of chicken.One hundred and ninety-two 22-day-old Arbor Acres broilers with the same health condition were randomly allocated to 4 treatments in artificial climate（environment-controled） chambers(at the temperature of 21，26，31 and 21/31 ℃).Each treatment contains 6 replicates and 8 birds for each replicate(4 females and 4 males).The experimental lasted 14 d.All limosis birds in each replicates were weighted on 1，7，14 d of the study，respectively.Feed intake was recorded daily，fresh faeces on 1，7 d were collected and subsequently analysed by Kjeldah method in order to analyse the effects of constant temperature and diurnal cyclic changing temperature on growth performance，nitrogen utilization and emission of chicken.The results showed that：1) The average daily weight gain(ADG) and average daily feed intake(ADFI) of birds in the treatment of 31 ℃ were significantly lower than birds in treatments of 21 and 26 ℃(P＜0.05),while the feedgain(F/G) was significantly higher that of the 2 treatments(P＜0.05)；Chickens in the treatment of 26 ℃ had significant lower ADG and ADFI when compared to the treatments of 21 ℃(P＜0.05) while there was no significant difference in F/G observed between the 2 groups(P＞0.05) on 1-7 and 1-14 d；Compared to the birds in constant temperature at 31 ℃，the birds in diurnal cyclic changing temperature at 21/31 ℃ had a significantly higher ADFI(P＜0.05) without significant changes in ADG and F/G(P＞0.05).2) On 7 d of this study，compared to the group of 21 ℃，STP of birds in group of 31 ℃ was significantly decreased(P＜0.05)，while SUN was significantly increased(P＜0.05)；STP of birds in diurnal cyclic changing temperature at 21/31 ℃ was significantly decreased(P＜0.05) when compared to the constant temperature at 26 ℃；On 14 d of experiment，compared to constant temperature at 21 and 26 ℃，STP of birds in treatment of constant temperature at 31 ℃ was significantly decreased(P＜0.05).3) Compared to the group of 21 and 26 ℃，birds in group of 31 ℃ had a significant decrease of NU(P＜0.05) and a significant increase of NEDG and NEFI(P＜0.05);On 7 d of the study，compared to constant temperature at 26 ℃，NU of birds in diurnal cyclic changing temperature at 21/31 ℃ was significantly decreased(P＜0.05);On 14 d of the study，compared to the group of 21 ℃，NU of birds in group of 26 ℃ had a significant decrease(P＜0.05) and a significant increase of NEFI(P＜0.05)；NU of birds diurnal cyclic changing temperature at 21/31 ℃ was significantly decreased(P＜0.05)，NEDG and NEFI significantly increased(P＜0.05) when compared to the constant temperature at 26 ℃.The results indicate that compared to 21 ℃，the treatment of 26 and 31 ℃ have significant effects on nitrogen metabolism and growth performance of birds；diurnal cyclic changing temperature at 21/31 ℃ significantly decreased nitrogen utilization and increased nitrogen emission of birds than constant temperature at 26 ℃.

CLC Number:

S831.4

WANG Xue-min，PENG Qian-qian，FENG Jing-hai，ZHEN Long，ZHANG Shao-shuai，CHANG Yu，ZHOU Ying，ZHANG Min-hong. Effects of Constant and Diurnal Cyclic Moderate Temperatures on Performance and Nitrogen Metabolism in Broilers[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2016, 47(3): 521-528.

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Effects of Constant and Diurnal Cyclic Moderate Temperatures on Performance and Nitrogen Metabolism in Broilers

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