产蛋期每日采食量对肉鸡脂肪和瘦肉基因品系产蛋性能、蛋品质和蛋组成的影响。

Effect of daily feed intake in laying period on laying performance, egg quality and egg composition of genetically fat and lean lines of chickens.

Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, China.

Br Poult Sci. 2011 Apr;52(2):163-8. doi: 10.1080/00071668.2011.559455.

Abstract

The objectives of this study were to evaluate the effects of feed intake on laying performance, egg quality and egg composition in a Fat line and a Lean line during the laying period (34 to 54 weeks of age). 2. The experiment was a 2 × 2 factorial design with two dietary intake levels (nutrition recommendation and 75% of recommendation) and two broiler genotypes (Fat line and Lean line). Hens (384 of each line) were randomly divided at 23 weeks of age into 4 treatments, with each treatment represented by 12 replicates of 16 birds each. The experiment started when the rate of lay reached 5% and continued until 54 weeks of age. 3. The results indicated that there was a significant interaction between daily feed intake and genotype on egg production, egg weight, percentage yolk, yolk/albumen ratio and yolk cholesterol content. Fat line hens produced significantly more eggs and had a lower incidence of cracked eggs than the Lean line hens. The reduction in feed intake decreased egg weight and increased egg production, egg-shape index and cholesterol content of yolk significantly.

摘要

本研究旨在评估采食量对产蛋性能、蛋品质和蛋组成的影响，研究对象为产蛋期（34 至 54 周龄）的 Fat 系和 Lean 系。
该实验采用 2×2 析因设计，设 2 个饲粮采食量水平（营养推荐量和推荐量的 75%）和 2 个肉鸡基因型（Fat 系和 Lean 系）。23 周龄时，将 384 只母鸡（每个系别 192 只）随机分为 4 个处理组，每个处理组有 12 个重复，每个重复 16 只鸡。实验从产蛋率达到 5%开始，持续到 54 周龄。
结果表明，日采食量和基因型对产蛋率、蛋重、蛋黄百分比、蛋黄/蛋清比和蛋黄胆固醇含量有显著的互作效应。Fat 系母鸡比 Lean 系母鸡产蛋更多，破蛋率更低。采食量减少显著降低了蛋重，增加了产蛋率、蛋形指数和蛋黄胆固醇含量。