POULTRY NUTRITION AND FEED

Effects of Microecologics on Performance, Intestinal Flora and Digestive Absorption of Breeding Hens in Late Laying Period

  • CHEN Caicai ,
  • ZHANG Hongxing ,
  • JIN Junhua ,
  • XIE Yuanhong ,
  • XIONG Lixia ,
  • LIU Hui
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  • Beijing Key Laboratory of Agricultural Product Detection and Control of Spoilage Organisms and Pesticide Residue, Beijing Laboratory of Food Quality and Safety, Beijing Engineering Laboratory of Probiotics Key Technology Development, Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China

Received date: 2021-05-06

  Online published: 2021-12-16

Abstract

This experiment was conducted to investigate the effects of Lactobacillus paracasei KL1 and Bacillus subtilis Liu-c1 microecologics on the performance, intestinal flora and digestive absorption of breeding hens in late laying hens. A total of 384 Jinghong No.1 laying hens at 54 weeks of age were randomly assigned to 4 groups, with 6 replicates of 16 birds. Blank group were fed a basal diet, and those in KL1, Liu-c1 and compound groups were fed the basal diets supplemented with 8.0×107 CFU/hen of KL1, Liu-c1 and compound microecologics (Lactobacillus paracasei KL1:Bacillus subtilis Liu-c1=1:1), respectively. The results showed as follows:1) laying rate in compound group was significantly increased by 8.84% (P<0.01), and that in KL1 group and Liu-c1 group was increased by 2.90% and 3.29% (P<0.05) compared with blank group. Hatchable egg rate in the compound group was significantly increased by 14.43% compared with blank group (P<0.01), and by 4.84% compared with Liu-c1 group (P<0.05), but there was no significant difference with the KL1 group (P>0.05). Feed/egg in the compound group was significantly increased by 5.45% compared with blank group (P<0.01), and by 3.26% compared with KL1 group (P<0.05), but there was no significant difference with the Liu-c1 group (P>0.05). 2) Compared with blank group, the relative abundance of Firmicutes in compound group was significantly increased by 35.68% (P<0.05), that of Proteobacteria was significantly decreased by 92.02% (P<0.01), and that of Lactobacillus and Bacillus were significantly increased by 111.73% and 300.00% (P<0.01), respectively, the number of Lactobacillus and Bacillus was significantly increased by 34.51% and 23.37% (P<0.05), respectively. 3) Compared with blank group, the trypsin activity in duodenum in compound group was significantly increased by 15.98% (P<0.01), the activity of neutral protease and the apparent digestibility of crude protein were increased by 13.13% and 48.50% (P>0.05), respectively, and the villous height/crypt depth in duodenum and ileum were significantly increased by 150.44% and 51.87% (P<0.01), respectively. In conclusion, compound probiotics (Lactobacillus paracei KL1:Bacillus subtilis Liuc-c1=1:1) has the best effect on improving intestinal protease activity, villous height/crypt depth, crude protein apparent digestibility and intestinal flora of breeding hens in late laying period.

Cite this article

CHEN Caicai , ZHANG Hongxing , JIN Junhua , XIE Yuanhong , XIONG Lixia , LIU Hui . Effects of Microecologics on Performance, Intestinal Flora and Digestive Absorption of Breeding Hens in Late Laying Period[J]. Chinese Journal of Animal Nutrition, 2021 , 33(12) : 6792 -6801 . DOI: 10.3969/j.issn.1006-267x.2021.12.021

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