Impact of fermented Broussonetia papyrifera on laying performance, egg quality, lipid metabolism, and follicular development of laying hens

作者：Niu, Kai -Min; Wang, Yong Feng; Liang, Xiaoxiao; Zhai, Zhenya; Liu, Jianping; Wang, Ruxia; Chen, Guoshun; Wu, Xin^*

来源：Poultry Science, 2023, 102(5): 102569.

DOI：10.1016/j.psj.2023.102569

• Lactobacillus plantarum
• laying hen
• Broussonetia papyrifera
• lipid metabolism
• follicular development

Hybrid Broussonetia papyrifera (BP) has been widely planted and commonly used as rumi-nant forage source after fermentation in China. Very less information is available to know the impact of fer-mented BP on laying hens, thus, we have investigated effects of dietary supplementation of Lactobacillus plantarum-fermented B. papyrifera (LfBP) on laying performance, egg quality, serum biochemical parame-ters, lipid metabolism, and follicular development of laying hens. A total of 288 HY-Line Brown hens (age, 23 wk) were randomly assigned into 3 treatment groups: control group (Con, a basal diet), LfBP1 and LfBP5 group (a basal diet supplemented with 1% or 5% LfBP). Each group has 8 replicates of twelve birds each. The results demonstrated that dietary supple-mentation of LfBP increased average daily feed intake (linear, P < 0.05), feed conversion ratio (linear, P < 0.05), and average egg weight (linear, P < 0.05) during the entire experimental period. In addition, dietary inclusion of LfBP enhanced the egg yolk color (linear, P < 0.01) but decreased the eggshell weight (quadratic, P < 0.05) and eggshell thickness (linear, P < 0.01). In serum, the LfBP supplementation linearly decreased the content of total triglyceride (linear, P < 0.01) but increased the content of high density lipoprotein-cho-lesterol (linear, P < 0.05). The gene expression related to hepatic lipid metabolism including acetyl-CoA car-boxylase, fatty acid synthase, and peroxisome prolifera-tor-activated receptor (PPARa) was down-regulated whereas liver X receptor was up-regulated in LfBP1 group. Moreover, LfBP1 supplementation remarkably reduced the F1 follicle number and ovarian gene expression of reproductive hormone receptors including estrogen receptor, follicle stimulating hormone recep-tor, luteinizing hormone receptor, progesterone recep-tor, prolactin receptor, and B cell lymphoma-2. In conclusion, dietary inclusion of LfBP could improve feed intake, egg yolk color, and lipid metabolism, but may cause a decline in eggshell quality with higher inclusion level, herein, 1% is suggested.

• 单位
  中国科学院