低蛋白质日粮对育肥猪生产性能、氮代谢及血液生化指标的影响

发布时间：2018-10-18 09:06

【摘要】：本研究旨在探讨低蛋白质日粮对育肥猪生产性能、氮代谢及血液生化指标的影响。试验选用初始体重为60kg左右的"长×大"杂交育肥猪84头,随机分为3组,每组4个重复,每个重复7头猪。对照组育肥猪饲喂正常蛋白质水平日粮(蛋白质含量为14.80%),试验组育肥猪饲喂低蛋白质日粮(蛋白质含量分别为13.86%和12.86%)。结果表明,降低育肥猪日粮蛋白质水平1~2个百分点,对育肥猪生长性能和养分表观消化率均没有产生显著影响(P0.05);另外,饲喂低蛋白质日粮后,育肥猪的摄入氮、吸收氮、总氮排出量、尿氮以及血清中尿素水平均呈现出降低的趋势(P0.05);氮的表观生物学价值和血清肌酐含量随日粮蛋白质水平的降低而升高(P0.05)。试验结果表明日粮蛋白质水平降低1~2个百分点对育肥猪生产性能和健康状况无不利影响,同时降低日粮成本和增重成本,还可显著降低氮的排放,有助于缓解养殖业对环境造成的污染。
[Abstract]:The purpose of this study was to investigate the effects of low protein diet on performance, nitrogen metabolism and blood biochemical indexes of fattening pigs. 84 crossbred fattening pigs with initial weight of about 60kg were randomly divided into 3 groups with 4 replicates in each group and 7 pigs in each group. The fattening pigs in the control group were fed with normal protein level diet (14.80%), and the fattening pigs in the experimental group were fed low protein diet (13.86% and 12.86%, respectively). The results showed that there was no significant effect on growth performance and apparent nutrient digestibility of fattening pigs by reducing dietary protein level by 1 ~ 2% (P0.05), in addition, nitrogen intake and nitrogen uptake of fattening pigs were increased after feeding low protein diet. Total nitrogen excretion, urine nitrogen and serum urea level all showed a decreasing trend (P0.05); the apparent biological value of nitrogen and serum creatinine content increased with the decrease of dietary protein level (P0.05). The results showed that 1 ~ 2 percentage point reduction of dietary protein level had no adverse effect on production performance and health status of fattening pigs, but also decreased dietary cost and weight gain cost, but also significantly reduced nitrogen emissions. It helps to alleviate the pollution caused by aquaculture.
【作者单位】：北京市农林科学院畜牧兽医研究所;甘肃农业大学动物科学技术学院;
【基金】：[基金项目]生猪产业技术体系北京市创新团队(BAIC02-2016)
【分类号】：S828.5

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