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Prediction of net energy of feeds for broiler chickens

Animal Nutrition 2024年第1期16卷 241-250页

作者： aye-cho tay-zar Manoosak Wongphatcharachai Pairat Srichana Pierre-André Geraert Jean Noblet Charoen Pokphand Foods Public Company Limited(CPF) BangkokThailand Adisseo France S.A.S. AntonyFrance INRAE RennesFrance

Net energy(NE)enables the prediction of more accurate feed energy values by taking into account the heat increment which is approximately 25%of apparent metabolizable energy(AME)in ***,application of NE in poultry industry has not been practiced *** predict the NE values of broiler diets,23 diets were prepared by using 13 major ingredients(wheat,corn,paddy rice,broken rice,cassava pellets,full-fat soybean,soybean meal,canola meal,animal protein,rice bran,wheat bran,palm kernel meal and palm kernel oil).The diets were formulated in order to meet the birds'requirements and get a wide range of chemical compositions(on DM basis;33.6%to 55.3%for starch;20.8%to 28.4%for CP,2.7%to 10.6%for ether extract[EE]and 7.0%to 17.2%for NDF),with low correlations between these nutrients and low correlations between the inclusion levels of ingredients allowing for the calculation of robust prediction equations of energy values of diets or *** diets were fed to Ross 308 broilers raised in 12 open-circuit respiratory chambers from 18 to 23 d of age(4 birds per cage)and growth performance,diet AME content and heat production were measured,and dietary NE values were *** trial was conducted on a weekly basis with 12 diets measured each week(1per chamber),1 of the 23 diets(reference diet)being measured each *** diet was tested at least *** total,235 energy balance data values were available for the final *** performance,AME(15.3 MJ/kg DM on average)and AME/GE(79.4%on average)values were as *** NE/AME value averaged 76.6%and was negatively influenced by CP and NDF and positively by EE in connection with efficiencies of AME provided by CP,EE and starch for NE of 73%,87%and 81%,*** best prediction equation was:NE=(0.815×AME)—(0.026×CP)+(0.020×EE)—(0.024×NDF)with NE and AME as MJ/kg DM,and CP,EE and NDF as%of *** NE prediction equations from this study agree with other recently reported equation

关键词： Net energy Broiler Poultry Feed evaluation Energy system

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Re-evaluation of recent research on metabolic utilization of energy in poultry:Recommendations for a net energy system for broilers

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Animal Nutrition 2024年第1期16卷 62-72页

作者： Jean Noblet aye-cho tay-zar Shu-Biao Wu Pairat Srichana Pierre Cozannet Pierre-Andre Geraert Mingan choct INRAE RennesFrance Charoen Pokphand Foods Public Company Limited(CPF) BangkokThailand School of Environmental and Rural Science University of New EnglandArmidaleAustralia Adisseo France S.A.S. AntonyFrance

Different energy systems have been proposed for energy evaluation of feeds for domestic *** oldest and most commonly used systems take into account the fecal energy loss to obtain digestible energy(DE),and fecal,urinary and fermentation gases energy losses to calculate metabolizable energy(ME).In the case of ruminants and pigs,the net energy(NE)system,which takes into account the heat increment associated with the metabolic utilization of ME,has progressively replaced the DE and ME systems over the last 50 *** poultry,apparent ME(AME)is used exclusively and NE is not yet used *** present paper considers some important methodological points for measuring NE in poultry feeds and summarizes the available knowledge on NE systems for *** prediction equations based on a common analysis of three recent studies representing a total of 50 complete and balanced diets fed to broilers are proposed;these equations including the AME content and easily available chemical indicators have been validated on another set of 30 *** equations are applicable to both ingredients and complete *** rely primarily on an accurate and reliable AME value which then represents the first limiting predictor of NE *** analysis indicates that NE would be a better predictor of broiler performance than AME and that the hierarchy between feeds is dependent on the energy system with a higher energy value for fat and a lower energy value for protein in an NE *** considerations for implementing such an NE system from the commonly used AME or AMEn(AME adjusted for zero nitrogen balance)systems are *** conclusion,there is sufficient information to allow the implementation of the NE concept in order to improve the accuracy of feed formulation in poultry.

关键词： Poultry Feed evaluation Net energy Energy system

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Re-evaluation of recent research on metabolic utilization of energy in poultry: Recommendations for a net energy system for broilers

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Animal Nutrition 2024年第1期 62-72页

作者： Jean Noblet aye-cho tay-zar Shu-Biao Wu Pairat Srichana Pierre Cozannet Pierre-Andre Geraert Mingan choct INRAE Charoen Pokphand Foods Public Company Limited (CPF) School of Environmental and Rural Science University of New England Adisseo France S.A.S.

Different energy systems have been proposed for energy evaluation of feeds for domestic animals. The oldest and most commonly used systems take into account the fecal energy loss to obtain digestible energy(DE), and fecal, urinary and fermentation gases energy losses to calculate metabolizable energy(ME). In the case of ruminants and pigs, the net energy(NE) system, which takes into account the heat increment associated with the metabolic utilization of ME, has progressively replaced the DE and ME systems over the last 50 years. For poultry, apparent ME(AME) is used exclusively and NE is not yet used widely. The present paper considers some important methodological points for measuring NE in poultry feeds and summarizes the available knowledge on NE systems for poultry. NE prediction equations based on a common analysis of three recent studies representing a total of 50 complete and balanced diets fed to broilers are proposed; these equations including the AME content and easily available chemical indicators have been validated on another set of 30 diets. The equations are applicable to both ingredients and complete diets. They rely primarily on an accurate and reliable AME value which then represents the first limiting predictor of NE value. Our analysis indicates that NE would be a better predictor of broiler performance than AME and that the hierarchy between feeds is dependent on the energy system with a higher energy value for fat and a lower energy value for protein in an NE system. Practical considerations for implementing such an NE system from the commonly used AME or AMEn(AME adjusted for zero nitrogen balance) systems are presented. In conclusion, there is sufficient information to allow the implementation of the NE concept in order to improve the accuracy of feed formulation in poultry.

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喷墨打印纳米ZnO种子制备ZnO微晶棒超疏水表面(英文)

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中国印刷与包装研究 2011年第4期3卷 71-75页

作者： MYINT Myo tay zar KITSOMBOONLOHA Rungrot BARUAH Sunandan DUTTA Joydeep 许英 Center of Excellence in Nanotechnology School of Engineering and Technology Asian Institute of TechnologyKlong Luang Pathumthani 12120Thailand University of California

本文主要研究了由ZnO组成的超疏水表面的合成和性能。ZnO本身具有亲水性,但通过改性表面微结构可以生成疏水性表面。采用喷墨打印的方式将纳米ZnO种子打印在载玻片上,形成微凸包,再通过水热法生成ZnO微晶棒以获得超疏水表面,测得表面接... 详细信息

本文主要研究了由ZnO组成的超疏水表面的合成和性能。ZnO本身具有亲水性,但通过改性表面微结构可以生成疏水性表面。采用喷墨打印的方式将纳米ZnO种子打印在载玻片上,形成微凸包,再通过水热法生成ZnO微晶棒以获得超疏水表面,测得表面接触角为153°。同时分析了具有不同微晶棒阵列的超疏水表面接触角变化情况。

关键词：超疏水性 ZnO微晶棒喷墨打印双重结构接触角

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