冬毛期降低蛋白质水平对乌苏里貉生产性能及毛皮品质的影响

The Effect of Reduceing Protein on Raccoon Dogs Performance and Pelt Properties in the Winter Fur Growth Period

本研究通过降低日粮蛋白质含量,研究低于营养推荐值的蛋白质水平对冬毛期乌苏里貉生产性能的影响。选用34只体重相近,健康的4月龄公貉,随机分为2组,每组17只。按饲喂蛋白质水平不同分为对照组(常规日粮,蛋白质含量为25.62%)、低蛋白质组(Met,0.15%,蛋白质含量为19.49%),分别饲喂相应的日粮,试验期60 d。结果表明,对照组干物质采食量(P=0.010)、体重(P=0.003)显著高于低蛋白质组;日增重(P=0.059)有高于低蛋白质组的趋势,但差异不显著;粗蛋白质消化率(P=0.812)、粗脂肪消化率(P=0.856)与低蛋白质组相比差异不显著;低蛋白质组干物质消化率显著高于对照组(P=0.002);血清总蛋白含量显著高于对照组(P=0.047)。低蛋白质组血清中含硫氨基酸,蛋氨酸(P=0.830)、半胱氨酸(P=0.420)的含量有高于对照组的趋势,但差异不显著。低蛋白质组赖氨酸浓度显著高于对照组(P=0.004);与低蛋白质组相比对照组皮长(P=0.013)、皮重(P=0.001)、针毛长度(P=0.012)、针绒毛密度(P=0.037)均显著增加。因此,冬毛期降低日粮蛋白质水平可以提高乌苏里貉干物质消化率,增加血清中总蛋白质的含量,但是对干物质采食量、体重及毛皮品质有不利影响。

The study investigated the effect of reducing the protein level in growth period on performance of raccoon dogs.Thirty-four male raccoon dogs with similar body weights,healthy,were assigned to one of two dietary treatments of 17 each,according to the protein level divided into 2 treatments,the control（conventional rations,protein,25.62%）,the low protein group（Met,0.15%,protein,19.49%）,experimental period was 60 d.As a result,the body weight（P=0.003） and dry matter intake（P =0.010） in the control increased significantly the treatment group.The crude protein digestibility（P =0.812）,crude fat digestibility（P =0.856） in the control was similar with the low protein group.The dry matter digestibility（P=0.002）,the total protein in the serum（P =0.047） was increased significantly in the low protein group.There was a increasing trend of the daily gain（P =0.059）,sulfur amino acid as methionine（P =0.830） and cystine（P =0.420）,but the variance was not predominant.The pelt length（P =0.013）,pelt weight（P=0.001）,the length of guard hair（P =0.012）,the density of guard and under hair（P =0.037） were increased evidently in the control.The reduced protein level in diets of raccoon dogs in winter period,can enhance animals production performance such as dry matter digestibility and the total protein in the serum,but it also brings the unreversible disadvantage influence on dry matter intake,body weight,pelt properties.