摘要
试验研究低蛋白质饲粮添加苏氨酸对海南猪生长性能和饲料养分表观消化率的影响。选用64头体重(55.31±3.09)kg海南猪,随机分为4组,每组4个重复,每个重复4头猪。对照组饲粮粗蛋白质水平16%,苏氨酸水平0.6%;试验Ⅰ组、试验Ⅱ组和试验Ⅲ组的粗蛋白水平14%,苏氨酸的添加水平分别为0.6%、0.8%和1.0%。试验组参考对照组平衡赖氨酸、色氨酸、缬氨酸和精氨酸。试验期35 d。结果显示:低蛋白质饲粮添加苏氨酸至0.8%可使海南猪的生产性能恢复到正常饲粮水平(P>0.05)。低蛋白质饲粮添加苏氨酸显著提高海南猪粗蛋白质和磷的表观消化率(P<0.05),试验Ⅲ组猪的粗蛋白质表观消化率比对照组高13.46%,试验Ⅱ组比对照组提高12.03%;试验Ⅱ组猪的磷表观消化率比对照组提高9.02%,试验Ⅲ组猪的磷表观消化率比对照组提高8.00%(P<0.05)。研究表明,海南猪饲粮粗蛋白质降低至14%,补充添加苏氨酸至0.8%,可以在提高饲料利用率的同时不降低海南猪的生长速度,建议在海南猪生产中使用。
The experiment was conducted to study the effect of low protein diets supplemented with threonine on growth performance and feed digestibility of Hainan pigs.64 Hainan pigs with the body weight of(55.31±3.09)kg were randomly divided into four groups,with four replicates in each group and four pigs in each replicate.The pigs in control group were fed with 16%crude protein level and 0.6%threonine level.The crude protein level of trial groupsⅠ,groupⅡand groupⅢwas 14%,and the supplemental level of threonine was 0.6%,0.8%and 1.0%,respectively.The experimental group was balanced with lysine,tryptophan,valine and arginine.The experiment lasted for 35 d.The results showed that adding threonine to low protein diet to 0.8%could restore the production performance of Hainan pigs to normal diet level(P>0.05).Low protein diet supplemented with threonine significantly increased the apparent digestibility of CP and P of Hainan pigs(P<0.05),and the apparent digestibility of CP of pigs in groupⅢand groupⅡwere 13.46%and 12.03%higher than that in control group.Compared with control group,the apparent digestibility of phosphorus of pigs in groupⅡwas increased by 9.02%,and that in groupⅢwas increased by 8.00%(P<0.05).The experiment indicates that dietary crude protein reduced to 14%and threonine supplemented to 0.8%can improve feed utilization rate without reducing growth rate of Hainan pigs,and it was suggested to be used in production of Hainan pigs.
作者
魏立民
刘圈炜
晁哲
黄丽丽
邢漫萍
王峰
郑心力
孙瑞萍
WEI Li-min;LIU Quan-wei;CHAO Zhe;HUANG Li-li;XING Man-ping;WANG Feng;ZHENG Xin-li;SUN Rui-ping
出处
《饲料研究》
CAS
北大核心
2022年第9期35-39,共5页
Feed Research
基金
海南省省属科研院所技术开发专项(项目编号:KYYS-2019-08、jscx202002)。
关键词
低蛋白质饲粮
苏氨酸
海南猪
生长性能
养分表观消化率
low protein diets
threonine
Hainan pigs
growth performance
nutrient apparent digestibility
