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Effective microorganism combinations improve the quality of compost-bedded pack products in heifer barns: exploring pack bacteria-fungi interaction mechanisms

文献类型： 外文期刊

作者： Zhang, Zhenbin 1 ; Gu, Yalan 1 ; Wang, Shan 1 ; Zhen, Yongkang 1 ; Chen, Yifei 1 ; Wang, Yongkuan 4 ; Mao, Yongjiang 1 ; Meng, Jimeng 2 ; Duan, Zhenyu 2 ; Xu, Jun 5 ; Wang, Mengzhi 1 ;

作者机构： 1.Yangzhou Univ, Coll Anim Sci & Technol, Lab Metab Manipulat Herbivorous Anim Nutr, Yangzhou 225009, Jiangsu, Peoples R China

2.Xinjiang Acad Agr Reclamat Sci, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi 832000, Xinjiang, Peoples R China

3.Shanghai Frontan Anim Hlth Co Ltd, Shanghai 201502, Peoples R China

4.Edweigang Modern Anim Husb Co Ltd, Suqian 223999, Jiangsu, Peoples R China

5.Jiangxi Acad Agr Sci, Inst Qual & Safety & Stand Agr Prod Res, Nanchang 330299, Jiangxi, Peoples R China

关键词： Compost-bedded pack barns; Effective microorganisms; Compost quality; Microbial community

期刊名称：BMC MICROBIOLOGY （ 影响因子：4.0； 五年影响因子：4.6 ）

ISSN： 1471-2180

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundCompost-bedded pack barns (CBP) are getting huge attention as an alternative housing system for dairy cows due to their beneficial impact on animal welfare. Effective microorganisms (EM) inoculums are believed to enhance compost quality, improve soil structure and benefit the environment. However, little information is available on the impact of incubation with external EM combinations on the barn environment, compost quality and microbial diversity in CBP. This experiment was carried out to investigate the effect of inoculating different combinations of EM [Lactobacillus plantarum (L), Compound Bacillus (B) and Saccharomyces cerevisiae (S)] on compost quality and microbial communities of CBP products, as well as the relationship with the heifers' barn environment. CBP barns were subjected to the following four treatments: CON with no EM inoculum, LB/LS/LBS were Incubated with weight ratios of 1:2 (L: B), 1:2 (L: S), 1:1:1 (L: B: S), respectively.ResultsThe EM inoculation (LB, LS, LBS) reduced the concentration of respirable particulate matter (PM10 and PM2.5) in the CBP, and decreased the serum total protein and total cholesterol levels in heifers. Notably, LBS achieved the highest content of high-density lipoprotein compared to other treatments. Microbiome results revealed that EM inoculation reduced the bacterial abundance (Chao1 index) and fungal diversity (Shannon & Simpson indexes), while increasing the relative abundance of various bacterial genera (Pseudomonas, Paracoccus, Aequorivita) and fungi (Pestalotiopsis), which are associated with cellulose decomposition that ultimately resulted in accelerating organic matter degradation and humification. Furthermore, high nutrient elements (TK&TP) and low mycotoxin content were obtained with EM inoculation, with LBS showing a particularly pronounced effect. Meanwhile, LBS contributed to a decline in the proportion of fungal pathogen categories but also led to an increase in fungal saprotroph categories.ConclusionGenerally, EM inoculation positively impacted compost product quality as organic fertilizer and barn environment by modifying the abundance of cellulolytic bacteria and fungi, while inhibiting the reproduction of pathogenic microbes, especially co-supplementing with L, B and S achieved an amplifying effect.

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