Diludin促猪生长作用及对甲状腺素、皮质醇分泌影响的研究

The Effect of Diludin on Pig Growth and Serum Levelof T3, T4 and Corticosteriod

本试验研究了Ｄｉｌｕｄｉｎ对２０头２０ｋｇ体重迪卡生长猪和２４头６０ｋｇ体重迪卡育肥猪生长的影响，并研究了对甲状腺素中三碘甲腺原氨酸（Ｔ３）、四碘甲腺原氨酸（Ｔ４）以及皮质醇含量的影响，以阐明其促生长作用机理。结果表明：（１）添加３７５ｍｇ／ｋｇＤｉｌｕｄｉｎ可以提高生长猪日增重和饲料报酬，但对日增重的影响前期大于后期，前期日增重（３５１５０ｇ）比对照组（３２７５０ｇ）提高７３３％，而后期日增重（８０９１０ｇ）比对照组（７９２５０ｇ）只提高２０９％。全期饲料报酬试验组（２０９６）比对照组（２２１９）提高５５４％。（２）添加２５ｍｇ／ｋｇＤｉｌｕｄｉｎ可使育肥猪日增重和饲料报酬（９０８９ｇ，３７７）分别比对照组（７６０９ｇ，３８６）提高１９４５％，２３３％；添加５０ｍｇ／ｋｇ可使育肥猪日增重和饲料报酬（９３５７ｇ，３７２）分别比对照组（７６０９ｇ，３８６）提高２２９７％，３６３％。（３）５０ｍｇ／ｋｇ组猪膘厚（１１９±００３）ｃｍ与对照组（１２８±０２６）ｃｍ相比下降７０３％，提高了瘦肉率。（４）血清Ｔ３质量比为２５ｍｇ／ｋｇ组（０４６６±０２０２）ｎ?

This experiment was conducted to study the effect of Diludin on the growth properties of growing- pigs(20 DiKa pigs of 20 kg)and fattening pigs(24 DiKa pigs of 60kg)Observations were kept on body weight, daily weight gain , feed conversion efficiency The concentration of T3, T4 and conticosteriod in serum were measured by radio immunoassay (RIA)to explain the mechanism of the growth stimulating properties of Diludin on pigs The result showed that (1) Diluidn could improve daily weight gain and feed conversion efficiency of growing pigs Especially in earlier stage of the experiment The earlier daily weight gain of group 375 mg/kg(35150 g)was improved 733% in contrast to control group(32750 g) Whereas daily weight gain in later stage(8091 g) was improved only 209% in contrast to control group (79250 g) The feed conversion efficiency of group 375 mg/kg(2096) was improved 554% in contrast to control group(2219) (2)The result showed that daily weight gain and feed conversion efficiency of group 25 mg/kg(90890,377) were improved 1945% and 233% in contrast to control group(76090 g ,385) respectively;The daily weight gain and feed conversion efficiency of group 50mg/kg(9357 g,372) were improved 2297% and 363% in contrast to control group(76090g ,386) respectively(3) Fat-thickness of group 50]mg/kg19003)cm] was decreased 703% in contrast to control group6)cm],and the percentage of lean meat was increased(4) Compared with control groupL],concentration of T3 of groups 25 mg/kg and 50G-*8]mg/kg have an increasing tendency; concentration of T4 of group 50 mg/kg was higher significently(p<005)than that of control group ;corticosteroid concentration of group 50 mg/kg has a decreasing tendency in contrast to control group Comprehensive surveying the consquence of experiment, 50 mg/kg is the best dosage to fattening pigs and preliminarily explained the mechanism of the growth stimulating effect of Diludin on fattening pigs