摘要
选取健康、体重相近的15日龄双鬼头肉鸭480只,随机分成4个组,每个组6个重复,每个重复20羽,分别饲喂木薯添加量为0、10%、20%和30%的试验日粮,进行为期30 d的试验。结果表明:①随着木薯添加量的增加,肉鸭平均日采食量逐渐上升,30%木薯组显著高于10%木薯组(P﹤0.05),而肉鸭日增重呈现先上升后下降的趋势,其中20%木薯组的45日龄重(末重)和平均日增重均与对照组差异显著(P﹤0.05),当木薯添加量为20%时肉鸭增重效果最佳,料重比最低;②当木薯添加量为10%和20%时,日粮干物质表观消化率和表观代谢能显著高于其他2组(P﹤0.05),且有提高蛋白质表观消化率的趋势;除甘氨酸、精氨酸、苏氨酸、脯氨酸、缬氨酸和异亮氨酸外,其他氨基酸表观消化率各组间的差异均不显著(P﹥0.05),但10%木薯组和20%木薯组的蛋氨酸和赖氨酸表观消化率较其他2组均有提高的趋势。综合考虑,在肉鸭日粮中用木薯替代部分玉米,可以在一定程度上提高日粮中干物质和蛋白质的表观消化率,从而达到增重和降低料重比的效果。肉鸭日粮中木薯添加量以10%～20%为宜。
To investigate the effect of cassava on growth performance and nutrient utilization of meat ducks,a total of 480 meat ducks aged 15 d were randomly allotted to four treatments with six replicates in each treatment and each replicate containing 20 ducks.The four treatments were fed with the diet supplemented with 0,10%,20%,30% cassava respectively for 30 d.The results showed： ① With the increasing of cassava,the average daily feed intake was gradually increased,and the average daily feed intake in the treatment with 30% cassava was significantly higher than that in the treatment with 10% cassava（P0.05）;the gain weight first increased and then decreased.There were significant differences in final weight（45-old weight） and average daily weight gain between the treatment with 20% cassava and the control（P0.05）.The best of gain weight and feed/gain ratio were found in the treatment with 20% cassava.② The apparent digestibility of dry matter and apparent metabolism energy in diets with 10% or 20% cassava were higher than those in the diets from other two treatments（P0.05） and the diet with 10% or 20% cassava also showed a increasing tendency in the apparent digestibility of protein.Apart from glycine,arginine,threonine,proline,valine and isoleucine,the apparent digestibility of other amino acids showed no significant difference,but the apparent digestibility of methionine and lysine in the diets with 10% and 20% cassava were higher compared to those in the diets from other two treatments.The results indicated replacing part of the corn with cassava could increase the apparent digestibility of dry matter and protein of meat duck diet to a certain extent,thus increase gain weight and decrease feed/gain ratio,and the optimal supplemental level of cassava in the diet of meat ducks was 10% 20%.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期78-82,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家科技支撑计划项目(2007BAQ01047)
湖南省生猪产业技术体系岗位专家专项经费资助(2007FJ1003)
关键词
肉鸭
木薯
日粮
生长性能
养分利用率
meat ducks
cassava
diet
performance
nutrient utilization
