發(fā)布時間：2018-06-01 10:15

  本文選題：乳酸菌 + 生物學特性　； 參考：《中國微生態(tài)學雜志》2016年05期

【摘要】：目的對籠養(yǎng)蛋雞盲腸中的優(yōu)良乳酸菌進行篩選、鑒定,并飼喂肉雛雞,研究同源乳酸菌作為微生態(tài)制劑的生物學特性。方法通過生長、產(chǎn)酸曲線,耐酸耐膽鹽測定及16SrDNA分子鑒定,對實驗乳酸菌進行生物學特性研究和鑒定。采用單因素試驗設計,選1日齡健康肉公雛雞180只,隨機分成3組。試驗組Ⅰ:飼喂基礎飼糧;試驗組Ⅱ:基礎飼糧+0.01%黃霉素;試驗組Ⅲ:基礎飼糧+0.2%CCL30菌制劑。飼喂28d,研究乳酸菌制劑對肉仔雞的促生長特性。結(jié)果從雞盲腸中分離的乳酸菌CCL30生長迅速、產(chǎn)酸能力強、耐酸耐膽鹽消化,鑒定為Lactobacillus plantarum(植物乳桿菌)。雛雞飼養(yǎng)實驗結(jié)果顯示,飼糧中添加乳酸菌制劑可提高肉雛雞日增重,顯著降低飼料轉(zhuǎn)化率,與抗生素組比較差異無統(tǒng)計學意義,且乳酸菌制劑能顯著增加盲腸內(nèi)乳酸菌的數(shù)量,有效抑制盲腸內(nèi)大腸埃希菌的繁殖(P0.05)。結(jié)論同源乳酸菌制劑對肉雛雞的生長具有促進作用,有同于抗生素的抑菌作用,且乳酸菌制劑具有安全優(yōu)勢,可替代抗生素作為雞用微生態(tài)制劑應用。
[Abstract]:Objective to study the biological characteristics of homologous lactic acid bacteria (Lactic acid bacteria) as microecological agents in cecum of cage laying hens by screening, identifying and feeding broiler chicks. Methods the biological characteristics of lactic acid bacteria were studied and identified by growth, acidogenic curve, acid tolerance and bile salt determination and 16SrDNA molecular identification. 180 1-day-old healthy male chicks were randomly divided into 3 groups by single factor design. The experimental group 鈪，

本文編號：1963828