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Reasearch on the requirements of threonine for 1~14 day-old Peking ducks

Zhang Li,Hou Shuisheng,Yang Lin,Huang Wei,Xie Ming,Yu Junying  
The effects of crude protein and threonine on production performance and threonine requirement of Peking ducks in 1~14 days were studied by completely randomized design.With similar pen weight,480 male Peking ducks with one-day old were allotted into 10 treatments,each included 6 replicats with 8 ducks each.Two basal diets that differed in CP (14% or 20%,respectively) were formulated to have identical contents of Thr included 5 levels(0.50%,0.58%,0.66%,0.74% and 0.82%),energy(12.75 and 12.59 MJ/kg ME) and other essential amino acids.Basal diets were supplemented with L-Thr from 0.50% to 0.82% with 0.08% increments.Peking ducks (480) were randomly allocated to 10 dietary treatments with 6 replicates of 8 male ducks.The results showed that A significant interaction between dietary CP and Thr was found for feed intake,body weight(BW) gain and FCE.Increasing Thr and crude protein supplementation improved feed intake,BW gain and FCE.InIn the high CP levels.the effects of threonine requirements on the growth indexes of average feed intake ,average daily gain and were all quadratic.According to the conic section model,the threonine requirements were 0.688%,0.737% ,respectively.In the low CP level,the average daily feed intake and average body weight gain increased with Thr increased,the Thr requirements was higher than in high crude protein.And the Thr requirements have some connection with crude protein levels.
【CateGory Index】: S834
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1 WU Shu-geng;WANG Xiao-cui;SONG Dan;ZHANG Hai-jun;YUE Hong-yuan;WANG Jing;QI Guang-hai;National Engineering Research Center of Biological Feed,Key Laboratory of Feed Biotechnology of Ministry of Agriculture,Feed Research Institute,Chinese Academy of Agricultural Sciences;;Studies on Dietary Lysine Requirement of Jinghong Laying Hens from Hatch to the Age of 4 Weeks[J];畜牧兽医学报;2016-07
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1 NIE Wei1,YANG Ying1,WANG Zhong1,GUO Jun2,LI Xiao-dong3,GUO Yu-ming1(1.College of Animal Science and Technology,State Key Laboratory of Animal Nutrition,China Agricultural University,Beijing 100193,China;2.China National Township Enterprises Corp,Beijing 100125,China;3.Zhuozhou Animal Health inspection Institute,Hebei Zhuozhou 072750,China);Effects of Threonine on Immune Responses in Laying Hens[J];中国畜牧杂志;2011-19
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