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Effects of exogenous enzymes, Lactobacillus acidophilus or their combination on feed performance response and carcass characteristics of rabbits fed sugarcane bagasse

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Journal of Integrative Agriculture 2015年第3期14卷 544-549页

作者： Nahla A Abdel-Aziz Mounir El-Adawy Maria A Mariezcurrena-Berasain Abdelfattah Z M Salem Jaime Olivares-Pérez Ahmed E Kholif Borhami E Borhami Department of Animal and Fish Production Faculty of Agriculture Alexandria University Faculty of Veterinary Medicine and Animal Science Autonomous University of the State of Mexico Faculty of Veterinary Medicine and Animal Science Autonomous University of Guerrero Dairy Science Department National Research Centre

The aim of this study was to evaluate the effect of Lactobacillus acidophilus（LAC）, exogenous enzymes of ZAD（exogenous enzyme preparation） or their combination on feed conversion, and dressing of rabbits fed different treatments of sugarcane bagasse（SCB）. Five rations were allotted randomly to five groups of New-Zealand White（NZW） rabbits（n=10） with initial live body weight of（838±42.4） g and 5 weeks of age. Rabbits were fed on diets with different sources of fiber as follows,（i） a control diet composed of 100% berseem hay and 0% SCB,（ii） 50% berseem hay and 50% untreated SCB（USCB）,（iii） 50% berseem hay and 50% SCB treated with L. acidophilus（LAC）,（iv） 50% berseem hay and 50% SCB treated with ZAD（ZAD）, and（v） 50% berseem hay and 50% SCB treated with a combination of LAC＋ZAD（LZ）. Treatments of SCB with L. acidophilus, ZAD and LAC＋ZAD had the highest feed conversion ratio than both USCB and control. The dressing percentage of rabbits that fed the LAC and LZ diets was higher（P〈0.05） compared with that in the other groups. Performance index（PI） for LAC group was improved（P〈0.05） compared to that for the other groups; however, PI for USCB group was the lowest（P〈0.05）. It could be concluded that treating SCB with L. acidophilus, exogenous enzymes of ZAD or their combination improved feed conversion and performance with more positive effects with L. acidophilus than the other treatments.

关键词： exogenous enzymes feed conversion Lactobacillus acidophilus rabbit sugarcane bagasse

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Effects of exogenous enzymes and dietary energy on performance and digestive physiology of broilers

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Journal of Animal Science and Biotechnology 2013年第4期4卷 294-302页

作者： Jialing Zou Ping Zheng Keying Zhang Xuemei Ding Shiping Bai Institute of Animal Nutrition Engineering Research Center for Animal Disease-Resistance Nutrition of China Ministry of Education Sichuan Agricultural University

The study was conducted to compare the effects of XG with AG and BM at different metabolizable energy diets on growth performance, digestive physiology and energy utilization of broilers fed with corn-SBM diet. A 2 x 4 factoria design was used with two basal diets （the positive control group, PC; negative control with ME reduction 100 kcal/ kg, NC） and with or without the addition of three exogenous enzymes （0.02% BM; 0.01% AG; 0.05% XG） respectively. 1,200 one-day-old broilers were randomly allocated to 8 treatments with 10 pens of 1_5 broilers. There was no significant difference on BW, BWG, and FI at 0-21d, 21-42d or 0-42d for diet, enzymes or their interactions, but FI at 22-42d and 0-42d were tend to be decreased with the addition of enzymes. The F/G was significantly improved by the addition of enzymes especially in NC diet. The dietary AME and TME in PC or NC diet were significantly increased by XG or AG in NC diet. The villus length and V/C of ileum were significantly increased by the addition of BM or XG. XG improved the activities of trypsin, chymotrypsin and amylase, BM improved the activity of trypsin at 21d, and AG improved the activity of chymotrypsin at 21d. Comparing to PC diet, the addition of enzymes in PC or NC diet decreased feed cost per kg body weight gain especially in NC diet （except AG in PC diet） with the highest profits for XG in NC diet. In conclusion, supplementation of 0.02% BM or 0.01% AG or 0.0.5% XG could improve feed conversion of broilers in corn-soybean meal diet by improving energy utilization and digestive physiology, and also supplementation of 0.05% XG had a preferable efficacy in low energy diet.

关键词： Broilers Digestive physiology exogenous enzymes Growth performance

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Xylanase improves the intestinal barrier function of Nile tilapia(Oreochromis niloticus)fed with soybean(Glycine max)meal

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Journal of Animal Science and Biotechnology 2023年第5期14卷 2224-2238页

作者： Tong Wang Nannan Zhou Junyi He Zhenzhen Hao Chentao Zhou Yidi Du Zhenyu Du Xiaoyun Su Meiling Zhang Laboratory of Aquaculture Nutrition and Environmental Health(LANEH) School of Life SciencesEast China Normal UniversityShanghai 200241China State Key Laboratory of Animal Nutrition Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China

Background Soybean(Glycine max)meal is one of the important protein sources for fish,but the non-starch polysaccharides(NSP)in soybean meal impair the intestinal barrier *** we aimed to investigate whether xylanase can alleviate the adverse effects on the gut barrier induced by soybean meal in Nile tilapia and to explore the possible *** Nile tilapia(Oreochromis niloticus)(4.09±0.02 g)were fed with two diets including SM(soybean meal)and SMC(soybean meal+3,000 U/kg xylanase)for 8 *** characterized the effects of xylanase on the gut barrier,and the transcriptome analysis was performed to investigate the underlying *** xylanase improved intestinal morphology and decreased the concentration of lipopolysaccharide(LPS)in *** results of transcriptome and Western blotting showed that dietary xylanase up-regulated the expression level of mucin2(MUC2)which may be related to the inhibition of protein kinase RNA-like endoplasmic reticulum kinase(perk)/activating transcription factor 4(atf4)signaling *** analysis showed that addition of xylanase in soybean meal altered the intestinal microbiota composition and increased the concentration of butyric acid in the ***,dietary sodium butyrate was supplemented into the soybean meal diet to feed Nile tilapia,and the data verified that sodium butyrate mirrored the beneficial effects of *** Collectively,supplementation of xylanase in soybean meal altered the intestinal microbiota composition and increased the content of butyric acid which can repress the perk/atf4 signaling pathway and increase the expression of muc2 to enhance the gut barrier function of Nile *** present study reveals the mechanism by which xylanase improves the intestinal barrier,and it also provides a theoretical basis for the application of xylanase in aquaculture.

关键词： Butyrate exogenous enzymes Intestinal health Intestinal microbiota Mucin Xylanase

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