产吲哚金黄杆菌降解不同羽毛的能力及羽毛发酵液促生效果研究OACSTPCD

The feather-degrading bacteria Chryseobacterium indolegenes X-Y4 was applied to degrade feathers from chicken,duck,goose and pigeon.During the degradation process,we monitored the structural changes of feathers and the release of soluble proteins.In addition,we studied the compositions of different feather fermentation broths,as well as their growth-promoting effects on Chinese cabbage.As a result,the degradation process started from feather twigs,followed by the rachis structures.Among various feathers,the duck feathers showed the fastest degradation.Regarding the release of soluble proteins,the protein contents gradually increased and then stabilized,with the highest level for fermentation broth from chicken feathers(127.6 μg/mL).Based on further analysis of amino acid composition in different feather fermentation broths,Asp and Glu,two common components to promote plant growth,showed the highest level in chicken feather fermentation broth,with the total amount reaching 47.5％.In addition,the chicken feather fermentation broth also gave the highest level of Arg(35.1％),a key amino acid to improve plant stress resistance.In the pot experiment,the fermentation liquids from chicken and pigeon feathers demonstrated the most significant effects on the growth of Chinese cabbage,leading to fresh weight increase by 115.7％and 125.6％,respectively.Notably,the plant height could increase by 12.0％from the use of pigeon feather broth.