单 位：
农业部华南动物营养与饲料重点实验室;广东省畜禽育种与营养研究重点实验室;广东省农业科学院动物科学研究所;广东省动物育种与营养公共实验室
关键词：
非植酸磷;繁殖性能;胫骨指标;血浆甲状旁腺激素;肉种母鸡
摘 要：
本试验旨在研究不同非植酸磷(NPP)水平对39~46周龄黄羽肉鸡父母代种鸡繁殖性能、胫骨指标和血浆生化指标的影响,探讨该阶段适宜磷供给量。试验选用39周龄岭南黄羽肉鸡父母代种母鸡810只,根据体重和产蛋率分为5个组,每组6个重复,每重复27只鸡。组1为对照组,饲喂玉米-豆粕型基础饲粮(NPP水平为0.30%),组2、3、4和5饲粮分别在基础饲粮中添加不同水平的磷酸氢钙,使饲粮NPP水平分别为0.35%、0.40%、0.45%和0.50%,其他营养成分各组基本一致。试鸡限饲122 g/(只·d),自由饮水。试验期8周。结果表明:1)试验期内,NPP水平未显著影响试鸡平均日增重、平均日产蛋量、料蛋比、平均蛋重和破蛋率(P>0.05),显著影响了产蛋率和不合格蛋率(P<0.05),0.45%组产蛋率显著高于0.30%和0.40%组(P<0.05),0.40%组不合格蛋率显著低于其余4组(P<0.05)。2)饲粮NPP水平显著影响了试鸡39~40周龄种蛋长径、蛋短径、蛋形指数和蛋壳强度(P<0.05),显著影响了45~46周龄种蛋蛋壳强度(P<0.05)。3)NPP水平对种蛋孵化性能(受精率、孵化率、健雏率、健雏平均出壳重)无显著影响(P>0.05)。4)饲粮NPP水平显著增加了试鸡脱脂胫骨粗灰分中钙、磷含量(P<0.05)。5)0.40%和0.45%NPP组试鸡血浆甲状旁腺激素含量显著高于0.30%和0.35%组(P<0.05),0.50%组血浆降钙素含量显著高于其余4组(P<0.05)。综上,39~46周龄黄羽肉鸡父母代种母鸡饲粮NPP适宜水平为0.40%~0.45%,根据采食量计算得到每日NPP需要量为0.488~0.549 g。
译 名：
Effect of Dietary Non-Phytate Phosphorus Level on Reproduction Performance,Tibial Indexes and Plasma Biochemical Indexes of Yellow-Feathered Broiler Breeders Aged from 39 to 46 Weeks
作 者：
JIANG Shouqun;JIANG Zongyong;ZHENG Chuntian;DING Fayuan;RUAN Dong;Guangdong Key Laboratory of Animal Breeding and Nutrition,Guangdong Public Laboratory of Animal Breeding and Nutrition,The Key Laboratory of Animal Nutrition and Feed Science ( South China) of Ministry of Agriculture,Institute of Animal Science,Guangdong Academy of Agricultural Sciences;
关键词：
non-phytate phosphorus;;reproduction performance;;tibial indexes;;parathyroid hormone in plasma;;broiler breeder hens
摘 要：
This experiment was conducted to investigate the effects of dietary non-phytate phosphorus(NPP)level on reproduction performance,tibial indexes and plasma biochemical indexes of yellow-feathered broiler breeders aged from 39 to 46 weeks,and in order to determine the suitable phosphorus allowance of this phase.Eight hundred and ten 39-week-old parent Lingnan yellow-feathered broiler breeder hens were randomly assigned to 5 groups.Each group had 6 replicates with 27 birds per replicate.Group 1 was the control group,in which the birds were fed a corn-soybean meal basal diet with 0.30% NPP.Dietary NPP levels in groups 2 to 5 were adjusted to 0.35%,0.40%,0.45% and 0.50% from the basal diet,respectively; all other nutrient levels were identical.Birds were fed 122 g of diet per bird per day and watered ad libitum during the experimental period of 8weeks.The results showed as follows: 1) dietary NPP level had no significant effects on average daily gain,average daily egg mass,the ratio of feed to egg,average egg weight,broken egg rate(P>0.05),had significant effects on laying rate and unqualified egg rate(P<0.05).Broiler breeders fed 0.45% NPP had a higher laying rate than those fed 0.30% and 0.40% NPP(P<0.05).Unqualified egg rate of 0.40% group was significantly lower than the other 4 groups(P<0.05).2) There were significant influences of dietary NPP level on long diameter,short diameter,shape index,and eggshell strength of eggs produced during the period of 39 to 40 weeks(P<0.05),and eggshell strength of eggs from 45 to 46 weeks(P<0.05).3) Dietary NPP level had no significant effect on hatching performance(fertilization rate,hatchability,salable chick rate and average salable chick birth weight)(P>0.05).4) The contents of calcium and phosphorus in dry defatted tibial ash were significantly increased by dietary NPP supplementation(P < 0.05).5) The contents in plasma of parathyroid hormone was significantly higher in birds fed diets containing 0.40% and 0.45% NPP than in those of 0.30% and 0.35%NPP(P<0.05) and calcitonin was higher in birds fed 0.50% NPP than all other NPP levels(P<0.05).The results indicate that the optimal dietary NPP level for yellow-feathered broiler breeders aged from 39 to 46 weeks is 0.40% to 0.45%,equivalent to 0.488 to 0.549g/d on the basis of calculated by feed intake.
