外源性多酶和植酸酶对饲喂玉米-小麦-豆粕日粮的肉鸡生长性能、养分消化率、血液代谢物、肠道微生物群和形态的协同作用。
Synergistic effect of exogenous multi-enzyme and phytase on growth performance, nutrients digestibility, blood metabolites, intestinal microflora and morphology in broilers fed corn-wheat-soybean meal diets.
作者信息
Kim MinJu, Ingale Santosh Laxman, Hosseindoust Abdolreza, Choi YoHan, Kim KwangYeol, Chae ByungJo
机构信息
Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, QLD 4072, Australia.
Advanced Enzyme Technologies Ltd., Thane 400604, India.
出版信息
Anim Biosci. 2021 Aug;34(8):1365-1374. doi: 10.5713/ab.20.0663. Epub 2021 Jan 1.
OBJECTIVE
This study was conducted to investigate the synergistic effect of exogenous multienzyme and phytase on growth performance, nutrients digestibility, blood metabolites, intestinal microflora, and morphology in broilers fed corn-wheat-soybean meal diets.
METHODS
A 2×2 factorial design was used in this study. Four dietary treatments consisted of i) basal diets (corn-wheat-soybean meal based diets without multi-enzyme and phytase), ii) basal diets with phytase (0.05%), iii) basal diets with exogenous multi-enzyme (0.05%), and iv) basal diets with exogenous multi-enzyme including phytase (0.05%). A total of 480 broiler chickens (Ross 308 - one day old) were weighed and allotted to thirty-two cages (15 birds per cage), and chicks were randomly allocated to four dietary treatments.
RESULTS
The body weight gain and feed conversion rate were improved by supplementation of exogenous multi-enzyme containing phytase during the finisher period (p<0.05). The birds fed diets with exogenous multi-enzyme containing phytase had a significantly greater digestibility of dry matter, gross energy, crude protein, calcium, and phosphorus compared with birds fed non-supplemented diets (p<0.05). The chickens fed diets with exogenous multi-enzyme containing phytase showed a higher concentration of Ca and P in the serum (p<0.05). The population of Lactobacillus spp., Escherichia coli, and Clostridium were not affected in the ileum and cecum of chickens fed enzyme-supplemented diets. The dietary supplemental exogenous multi-enzyme containing phytase showed a significant improvement in villus height, crypt depth, and villus height and crypt depth ratio, compared to basal diets or dietary supplemental phytase (p<0.05).
CONCLUSION
The supplementation of the exogenous multi-enzyme containing phytase synergistically improved the growth performance, nutrients digestibility, and villus height of the small intestine of broiler chickens fed a corn-wheat-soybean meal based diets.
目的
本研究旨在探讨外源性复合酶和植酸酶对以玉米-小麦-豆粕为基础日粮的肉鸡生长性能、养分消化率、血液代谢物、肠道微生物群和肠道形态的协同作用。
方法
本研究采用2×2析因设计。四种日粮处理包括：i）基础日粮（以玉米-小麦-豆粕为基础的日粮，不含复合酶和植酸酶），ii）添加植酸酶（0.05%）的基础日粮，iii）添加外源性复合酶（0.05%）的基础日粮，iv）添加含植酸酶的外源性复合酶（0.05%）的基础日粮。总共480只1日龄罗斯308肉鸡称重后分配到32个笼子（每个笼子15只鸡），雏鸡随机分配到四种日粮处理组。
结果
在育肥期添加含植酸酶的外源性复合酶可提高体重增加和饲料转化率（p<0.05）。与未添加日粮的鸡相比，饲喂含植酸酶的外源性复合酶日粮的鸡对干物质、总能、粗蛋白、钙和磷的消化率显著更高（p<0.05）。饲喂含植酸酶的外源性复合酶日粮的鸡血清中钙和磷的浓度更高（p<0.05）。在添加酶日粮的鸡的回肠和盲肠中，乳酸杆菌属、大肠杆菌和梭菌的数量未受影响。与基础日粮或添加植酸酶的日粮相比，添加含植酸酶的外源性复合酶日粮显著改善了绒毛高度、隐窝深度以及绒毛高度与隐窝深度之比（p<0.05）。
结论
添加含植酸酶的外源性复合酶可协同改善以玉米-小麦-豆粕为基础日粮的肉鸡的生长性能、养分消化率和小肠绒毛高度。
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