Improvement of Poplar Bark Extract on Physiological Characters of Lactococcus lactis in Intestine of White Feather Broilers

Chen Ming; He Pengfei; Liu Fu'an; Liu Guofang; Luo Guilan; Qin Dongyu; Song Chunlei; Yan Linlin; Zheng Guangyao; Zhu Haoyuan

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Improvement of Poplar Bark Extract on Physiological Characters of Lactococcus lactis in Intestine of White Feather Broilers

Improvement of Poplar Bark Extract on Physiological Characters of Lactococcus lactis in Intestine of White Feather Broilers

作者：

Chen Ming He Pengfei Liu Fu'an Liu Guofang Luo Guilan Qin Dongyu Song Chunlei Yan Linlin Zheng Guangyao Zhu Haoyuan

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Poplar

bark

extract

BROILER

Probiotic

Lactococcus

lactis

摘要：

[Objective]The paper was to study the improvement of poplar bark extract on intestinal Lactococcus lactis of white feather broilers.[Method]Totally 450 Ross 308 white-feather broilers were randomly divided into five groups:control group,low dose group,medium dose group,high dose group,and antibiotic group(oxytetracycline hydrochloride).The feeding duration was 45 d.The probiotics were screened and isolated through homology,and the physiological and biochemical characteristics of chicken intestinal bacteria in different groups were compared to determine the properties of bacterial strain.The drug resistance,antibacterial ability,proliferation ability,acid resistance and bile salt resistance of isolated strain were tested,and a strain of L.lactis was obtained.[Result]The isolated L.lactis was sensitive to other drugs except natural tetracyclines,and there was no significant difference among the four groups except oxytetracycline group;as the concentration of extract increased,the inhibition of L.lactis against Salmonella sp.increased;the medium dose extract had the largest increase in the ability to tolerate the proliferation of L.lactis.[Conclusion]Feeding poplar bark extract will produce positive effects on the physiological characters of intestinal L.lactis in broiler chicken,which will provide potential probiotic strain for chicken production.

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篇名	Improvement of Poplar Bark Extract on Physiological Characters of Lactococcus lactis in Intestine of White Feather Broilers
来源期刊	动物与饲料科学:英文版	学科	农学
关键词	Poplar bark extract BROILER Probiotic Lactococcus lactis
年，卷（期）	2020,（3）	所属期刊栏目
研究方向		页码范围	36-42
页数	7页	分类号	S83
字数		语种
DOI