动物营养学报2017，Vol.29Issue(12)：4639-4647,9.DOI:10.3969/j.issn.1006-267x.2017.12.047
低蛋白质饲粮中苏氨酸水平对离乳前期梅花鹿仔鹿生长性能和营养物质表观消化率的影响
Effects of Threonine Level in a Low Protein Diet on Growth Performance and Nutrient Apparent Digestibility of Early Weaning Sika Deer
摘要
Abstract
This experiment was conducted to investigate the effects of threonine ( Thr) level in a low protein diet on growth performance and nutrient apparent digestibility of early weaning sika deer.Twenty-four healthy 3-month-old male sika deer were randomly divided into 4 groups with 6 deer per group.Infant deer restricted feeding 4 different diets and lysine ( Lys) and methionine ( Met) levels in all diets were 0.87% and 0.28%, respectively.Infant deer in high protein diet control group ( groupⅠ) were fed a high protein diet with 16% protein level, and infant deer in low protein diet test groups were fed a low protein diet with 14% protein level and different levels of Thr.The Thr level in 4 diets was 0.54%( group Ⅰ) , 0.46%( group Ⅱ) , 0.59%( group Ⅲ) , 0.72%( group Ⅳ) .The pretrial period was 15 days, and the formal period was 30 days.The re-sults showed as follows:1) the average daily gain ( ADG) of high protein diet control group was extremely significantly higher than that of group Ⅱ (P<0.01), and had no significant difference compared with groups Ⅲ and Ⅳ ( P>0.05).The feed/gain ( F/G) of high protein diet control group was extremely significantly higher than that of groups Ⅲ and Ⅳ( P<0.01) , which was extremely significantly lower than that of group Ⅱ( P<0.01) .2) The apparent digestibility of crude protein of high protein diet control group was extremely sig-nificantly lower than that of groups Ⅲ and Ⅳ( P<0.01) , which was extremely significantly higher than that of group Ⅱ ( P<0.01) .The apparent digestibility of energy of high protein diet control group was extremely sig-nificantly lower than that of groups Ⅲ and Ⅳ ( P<0.01) , which had no significant difference compared with group Ⅱ (P>0.05).The apparent digestibility of calcium of group Ⅲ was significantly higher than that of group Ⅱ ( P<0.01) , which had no significant difference compared with other groups ( P>0.05) .3) The ap-parent digestibility of histidine ( His) , aspartic acid ( Asp) , glutamic acid ( Glu) , glycine ( Gly) and cysteine ( Cys) of high protein diet control group was significantly higher than that of group Ⅱ( P<0.05) , and the ap-parent digestibility of other amino acids in group Ⅱ had no significant difference ( P>0.05) .The apparent di-gestibility of Lys, Met, Thr, arginine ( Arg) , alanine ( Ala) and tyrosine ( Tyr) of high protein diet control group was extremely significantly lower than that of group Ⅲ ( P<0.01), and the apparent digestibility of valine ( Val) , leucine ( Leu ) , phenylalanine ( Phe ) and serine ( Ser ) was significantly lower than that of group Ⅲ ( P<0.05) .The apparent digestibility of Ala of high protein diet control group was extremely signifi-cantly lower than that of group Ⅳ( P<0.01) and the apparent digestibility of Lys, Thr, Val and Ala was sig-nificantly lower than that of group Ⅳ( P<0.05) , but it was no significant difference in the apparent digestibili-ty of other amino acids (P>0.05).It can be seen that the appropriate threonine level in the low protein diet can promote the growth and nutrient digestion and utilization of early weaning sika deer.Under the same dietary Lys and Met levels, the growth performance and nutrient apparent digestibility of sika deer fed 0.59% Thr low protein diet with protein level of 14% are better than those fed high protein diet with protein level of 16%.关键词
梅花鹿/苏氨酸/生长性能/低蛋白质饲粮Key words
sika deer/threonine/growth performance/low protein diet分类
农业科技引用本文复制引用
李仁德,王晓旭,张铁涛,张婷,王静,张雪蕾,李光玉,王凯英..低蛋白质饲粮中苏氨酸水平对离乳前期梅花鹿仔鹿生长性能和营养物质表观消化率的影响[J].动物营养学报,2017,29(12):4639-4647,9.基金项目
科技攻关计划( 20140203018NY) （ 20140203018NY）
长春市"双十工程"十工程40203 （）
科技攻关计划( 20170204041NY) （ 20170204041NY）
