饲粮不同代谢能、粗蛋白质水平对新杨绿壳蛋鸡产蛋后期生产性能、蛋品质及血清生化指标的影响

发布时间：2019-03-15 10:28

【摘要】：本试验旨在通过研究饲粮不同代谢能、粗蛋白质水平对新杨绿壳蛋鸡产蛋后期(44~56周龄)生产性能、蛋品质及血清生化指标的影响,得出其产蛋后期饲粮代谢能和粗蛋白质的适宜配比。选取768羽体重相近的43周龄末新杨绿壳蛋鸡,随机分为6组,每组4个重复,每个重复32羽。采用2×3因子(代谢能水平为10.87和11.08 MJ/kg,粗蛋白质水平为15.00%、15.50%和16.00%)设计试验,共设计6种饲粮。试验预试期1周,正试期12周。结果表明:1)饲粮不同代谢能、粗蛋白质水平对绿壳蛋鸡产蛋后期产蛋率和料蛋比有显著影响(P0.05),饲粮代谢能和粗蛋白质水平在产蛋率上表现出极显著的交互作用(P0.01),其中,高能低蛋组(代谢能为11.08 MJ/kg,粗蛋白质为15.00%)产蛋率最高,料蛋比最低。2)饲粮较高粗蛋白质水平(16.00%)能显著提高绿壳蛋鸡产蛋后期鸡蛋的哈氏单位(P0.05);饲粮较高代谢能水平(11.08 MJ/kg)能显著提高绿壳蛋鸡产蛋后期鸡蛋的蛋黄颜色(P0.05);饲粮代谢能和粗蛋白质水平在蛋品质上未表现出显著的交互作用(P0.05)。3)高能低蛋组绿壳蛋鸡血清尿素氮含量最低;饲粮较高代谢能水平(11.08 MJ/kg)能显著降低绿壳蛋鸡血清总胆固醇含量(P0.05)。综上,在本试验条件下,饲粮代谢能、粗蛋白质水平分别为11.08 MJ/kg和15.00%时,更有利于绿壳蛋鸡产蛋后期生产性能的发挥和蛋品质的改善。
[Abstract]:The purpose of this experiment was to study the effects of different metabolic energy and crude protein levels on the performance, egg quality and serum biochemical indexes of new poplar green shell laying hens at the late stage of laying (44 weeks 56 weeks). The optimum ration of metabolizable energy and crude protein in the later stage of egg laying was obtained. 768 new poplar green shell layers with similar body weight at the end of 43 weeks were randomly divided into 6 groups with 4 repeats in each group and 32 in each group. Six diets were designed with 2 脳 3 factors (metabolic energy levels of 10.87 and 11.08 MJ/kg, crude protein levels of 15.00%, 15.50% and 16.00%). The pre-test period was 1 week and the positive trial period was 12 weeks. The results were as follows: 1) different metabolic energy and crude protein level had significant effects on laying rate and feed / egg ratio of green shell laying hens at the late stage of laying (P0.05). Dietary metabolic energy and crude protein level showed significant interaction on laying rate (P0.01), among which, high energy and low egg group (metabolic energy 11.08 MJ/kg, crude protein 15.00%) had the highest laying rate. The feed / egg ratio was the lowest. 2) the higher crude protein level (16.00%) could significantly increase the Haugh unit (P0.05) of the eggs in the late laying stage of green shell laying hens. The higher metabolic energy level (11.08 MJ/kg) could significantly improve the egg yolk color of green shell laying hens at the late laying stage (P0.05). There was no significant interaction between dietary metabolic energy and crude protein level in egg quality (P0.05). 3) the serum urea nitrogen content was the lowest in high energy and low egg group. Dietary high metabolic energy level (11.08 MJ/kg) could significantly reduce the serum total cholesterol content of green shell laying hens (P0.05). On the whole, when the metabolic energy and crude protein level were 11.08 MJ/kg and 15.00%, respectively, the performance of green shell laying hens and the improvement of egg quality at the later stage of laying were more favorable to the growth of green shell laying hens.
【作者单位】：浙江大学饲料科学研究所农业部动物营养与饲料科学重点实验室;上海家禽育种有限公司;
【基金】：国家蛋鸡产业技术体系建设专项基金资助(CARS-41-K17) 国家科技支撑计划专项基金资助(2014BAD13B04)
【分类号】：S831.5

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