不同构型硒代蛋氨酸对岭南黄父母代肉种鸡生产性能和组织硒沉积的影响

Effects of Different Selenomethionine Forms and Levels on the Performance and Tissues Se Deposition of Lingnanhuang Parental Broiler Breeders

试验采用2因子×2水平完全随机试验设计,研究了DL-、L-硒代蛋氨(selenomethionine,SM)分别在基础日粮(硒含量为0.04 mg/kg)中添加0.15和0.30 mg/kg水平对肉种鸡生产性能、血清和组织硒含量、后代雏鸡组织及种蛋硒含量的影响。试验选取480只48周龄的岭南黄肉种鸡,随机分为4组,每组3个重复,每个重复40只。预试期2周,正试期8周。结果表明:0.15 mg/kg组较0.30 mg/kg组显著提高了肉种鸡产蛋率、种蛋孵化率和出雏率(P<0.05);0.30 mg/kg组较0.15 mg/kg组显著提高了种蛋内容物、肉种鸡的血清和组织及其后代1日龄雏鸡组织中的硒含量(P<0.05);不同构型SM对肉种鸡生产性能无显著影响(P>0.05);DL-SM组较L-SM组显著地提高了种蛋内容物、肉种鸡的血清和除胰脏外的组织及1日龄雏鸡除肝脏和肌肉外的组织中的硒含量(P<0.05);在出雏率和蛋黄硒含量方面,表现出了SM构型与水平间的互作效应(P<0.05)。结果提示:在提高肉种鸡生产性能方面,DL-SM与L-SM效果相当,适宜添加水平均为0.15 mg/kg;在提高硒沉积量方面,DL-SM显著优于L-SM,0.30 mg/kg显著优于0.15 mg/kg。

A 2 × 2 factorial arrangement of treatments in randomized design was conducted to investigate the effects of different selenomethionine （SM） forms and levels on the performance and serum and tissues Se contents of broiler breeders, and the Se contents in the inclusion of hatching eggs and tissues of the offspring. Two SM forms of DL-SM and L-SM were respectively supplemented at 0.15 or 0.30 mg/kg into the basal diet which included 0.04 mg/kg Se. A total of four hundred and eighty Lingnanhuang broiler breeders, 48 weeks of age, were allocated to 4 treatments, each of which included 3 replicates of 40 hens in each replicate. Pre-treatment period was 2 weeks, and the experiment lasted for 8 weeks. Results showed that the Se level of 0.15 mg/kg supplemented in the diet, compared with 0.30 mg/kg, significantly increased laying rate of broiler breeders, hatchability and birthrate of hatching eggs （P〈0.05） ; the Se level of 0.30 mg/kg led to a higher Se content in hatching eggs inclusion, serum and tissues of breeder hens and tissues of offspring （P〈0.05）. Different SM forms had no effects on growth performance of breeder hens （P〉0.05）. In addition, compared with L-SM, DL-SM showed a significant increase in Se content of hatching eggs inclusion, serum and tissues （except pancreas） of broiler breeders, and tissues （except liver and muscle） of 1-day-old offspring （P〈0.05）. The birthrate and Se content in yolk were significantly influ- enced by the interaction between forms and levels of SM. Above suggested that DL-SM, compared with L-SM, had an equal effects on the performance of broiler breeders, and the suitable supplemented level was 0.15 mg/kg. But in Se deposition, DL-SM was superior to L-SM and 0.30 mg/kg was superior to 0.15 mg/kg.