摘要
本试验旨在研究不同饲粮钙水平对49～56周龄黄羽肉种鸡生产性能、繁殖性能(产蛋性能、孵化性能、蛋品质)、血清钙和磷含量及胫骨性能的影响。选用49周龄父母代黄羽肉种鸡540只,根据体重分为6个处理,每个处理6个重复,每个重复18只。处理1为对照组,饲喂玉米-豆粕型基础饲粮,钙水平为2.75%,处理2～6为试验组,饲喂在基础饲粮中添加不同水平石粉替代沸石粉使钙水平分别为3.00%、3.25%、3.50%、3.75%和4.00%的试验饲粮,其他营养水平各处理基本一致。试鸡限饲粉料125 g/d,自由饮水,试验期8周。结果表明:饲粮钙水平对试鸡末重、平均日增重、平均蛋重、破蛋率、不合格蛋率、孵化性能、血清钙和磷含量、胫骨性能均无显著影响(P>0.05)。3.00%钙水平组试鸡料蛋比显著低于3.50%钙水平组(P<0.05),而与其他组差异不显著(P>0.05)。3.00%钙水平组试鸡产蛋率和日产蛋重显著高于除3.25%钙水平组外的其他各组(P<0.05)。根据双折线模型估测49～56周龄黄羽肉种鸡获得最佳产蛋率和日产蛋重的饲粮钙需要量均为3.00%,日摄入量均为3.75 g/d。
To study the effects of dietary calcium level on production performance, reproductive performance （laying performance, hatching performance, egg quality）, serum calcium and phosphorus contents and tibia quality of yellow-feathered broiler breeders aged from 49 to 56 weeks, five hundred and forty 49-week-old par- ent yellow-feathered broiler breeders were randomly assigned to 6 treatments. Each treatment had 6 replicates with 18 birds per replicate. Treatment 1 was the control group, in which the birds were fed corn-soybean meal based diet with 2.75% calcium. Treatments 2 to 6 were test groups, in which dietary calcium level was adjus- ted to 3.00%, 3.25%, 3.50%, 3.75% and 4.00% based on the basal diet through adding different levels of limestone instead of zeolite powder, respectively. Other nutrient levels in the 6 treatment diets except calci- um level were the same. Experimental birds were fed 125 g of diet per bird every day and watered ad libitum during the experimental period of 8 weeks. Results showed that different dietary calcium levels did not signifi- cantly affect the final weight, average daily gain, average egg weight, broken egg rate, unqualified egg rate, hatching performance, serum calcium and phosphorus contents and tibia quality of birds （ P 〉 0.05 ）. Feed to egg ratio of birds in 3.00% calcium group was significantly lower than that in 3.50% calcium group （ P 〈 0.05）, but there was no significant difference between 3.00% calcium group and the other groups （ P 〉 0.05）. Laying rate and daily egg mass of birds in 3.00% calcium group were significantly higher than those in the other groups except 3.25% calcium group （ P 〈 0.05 ）. Based on the estimated result by two-slope bro- ken-line model, the calcium requirement of yellow-feathered broiler breeders aged from 49 to 56 weeks for the optimal laying rate and daily egg mass both is 3.00% or 3.75 g/d.
出处
《动物营养学报》
CAS
CSCD
北大核心
2013年第2期310-318,共9页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
公益性行业(农业)科研专项(200903006)
国家肉鸡产业技术体系项目(CARS-42)
关键词
饲粮钙水平
繁殖性能
胫骨性能
黄羽肉种鸡
dietary calcium level
reproductive performance
tibia quality
yellow-feathered broiler breeders
