Impacts of dietary supplementation of bamboo vinegar and charcoal powder on growth performance,intestinal morphology,and gut microflora of large-scale loach Paramisgurnus dabryanus  

作　　者：Kwangjin JU Myongsuk KIL Sanghyok RI Tongchol KIM Juhyok KIM Wei SHI Lining ZHANG Maocang YAN Jiongming ZHANG Guangxu LIU 

机构地区：[1]College of Animal Sciences,Zhejiang University,Hangzhou 310058,China [2]College of Aquaculture,Wonsan Fisheries University,Wonsan 999093,DPR Korea [3]College of Life Science,Kim Hyong Jik University of Education,Pyongyang 99903,DPR Korea [4]Zhejiang Mariculture Research Institute,Wenzhou 325005,China

出　　处：《Journal of Oceanology and Limnology》2023年第3期1187-1196,共10页海洋湖沼学报（英文）

基　　金：Supported by the Key R&D Program of Zhejiang Province(No.2021C02048);the Science and Technology Project of Wenzhou(No.2019ZX002-02);the Natural Science Foundation of Zhejiang Province(No.LQ21C190003);the China Postdoctoral Science Foundation(No.2020M671743);the Zhejiang Provincial Key Laboratory Construction Plans(No.2020E10025);the Open Fund of Key Laboratory of Marine Ecosystem Dynamics,SIO(No.MED2020004)。

摘　　要：Although accumulating data demonstrate that dietary supplementation of bamboo vinegar and charcoal powder(BVC)can significantly strengthen the immunity and boost the growth of domestic animals,its application potency still awaits verification in commercial fish species such as the large-scale loach Paramisgurnus dabryanus.The impacts of 90-day dietary supplementation of 1%and 2%BVC on survival and growth performance of the loach,and on the intestinal morphological characteristics and gut microflora were analyzed.Our data show that the large-scale loach supplied with BVC at the experimental doses had significant higher survival rates and better growth performance(indicated by greater weight gain(1.13–1.14 times),higher specific growth rate(1.04 times),and lower feed conversion ratio(0.88–0.89 times))compared to that of the control(P<0.05).Histological examination revealed significant longer villus(3.22–5.54 times),deeper crypt(1.77–1.87 times),and thicker muscle(1.59–3.17 times)in the intestines of large-scale loach fed with BVC(P<0.05).Furthermore,we found that the gut microflora consisted of significantly fewer proportions of potential pathogenic bacterial species(Aeromonas veronii and Escherichia coli),but significantly greater proportions of beneficial microbes(Lactococus raffinolactis and Faecalibacterium prausnitzii).Therefore,dietary intake of BVC can promote intestinal tract development and optimize gut microflora,by which the survival and growth of large-scale loach may be improved.

关 键 词：bamboo vinegar bamboo charcoal Paramisgurnus dabryanus growth performance intestinal morphology gut microflora 

分 类 号：S965.1[农业科学—水产养殖]