摘要
选用１日龄商品代ＡＡ肉鸡２７０羽，研究稀土元素对肉鸡生长的影响。选用５４羽２９日龄公鸡进行代谢试验，研究稀土元素对肉鸡日粮中能量、粗蛋白质和氨基酸利用率的影响。结果表明：添加２０～８０ｍｇ·ｋｇ－１稀土元素，可提高肉鸡增重（Ｐ＜０．０１）和饲料转化率（Ｐ＜０．０５～０．０１），提高能量利用率（Ｐ＜０．０５～０．０１）和粗蛋白质利用率（Ｐ＜０．０５）；添加２０～１６０ｍｇ·ｋｇ－１稀土元素，可提高必需氨基酸利用率（Ｐ＜０．０５～０．０１）和总氨基酸利用率（Ｐ＜０．０５～０．０１）。其中，以４０ｍｇ·ｋｇ－１添加量肉鸡生长效果最佳，增重较对照组提高８．２９％（Ｐ＜０．０５）、料肉比下降８．４３％（Ｐ＜０．０１）、能量利用率提高３．８０％（Ｐ＜０．０１）、粗蛋白质利用率提高７．３５％（Ｐ＜０．０５）、必需氨基酸利用率提高３．３７％（Ｐ＜０．０５）、总氨基酸利用率提高４．２７％（Ｐ＜０．０１）。
Two hundred seventy one-day-old commerical A. A. broilers were used to study the effects of rare-earth elements on growth of broilers. Fifty-four 29 day-old male chicks were used in metabolic test to study the effects of rare-earth elements on availability of energy,crude protein and amino acids. The results indicated that weight gain (P<0. 05),feed conversion efficiency (P<0. 05～0.01 ), energy availability(P<0. 05～0. 01 )and crude protein availability (P<0. 05)increased significantly when 20～80 mg·kg-1 rare-earth elements were added into the basal ration. When 20～160 mg·kg-1rare-earth elements were added,essential amino acids availability and total amino acids availability increased significantly (P<0. 05～0. 01 ). Of all doses,40 mg· kg-1 was the best for the growth;weight gain (P< 0. 05 ), feed conversion efficiency(P< 0. 01 ), energy availability (P< 0. 01 ), crude protein availability(P<0. 05), essential amino acids availability (P<0 . 05 ) and total amino acids availability (P<0. 01 )rose by 8. 29%, 8. 43 %, 3. 80%, 7. 35 %, 3. 37 % and 4.27%,respectively.
出处
《上海农业学报》
CSCD
1996年第1期78-82,共5页
Acta Agriculturae Shanghai
关键词
稀土元素
能量
粗蛋白质
氨基酸
利用率
肉用鸡
Rare-earth elements
Broiler
Energy
Crude protein
Amino acids
Availability
