Investigation on Fermentation Characteristics and Microbial Communities of Wheat Straw Silage with Different Proportion

Overview

Journal Toxins (Basel)

Publisher MDPI

Specialty Toxicology

Date 2023 May 26

PMID 37235364

Authors

Zhenyu Wang

Zhongfang Tan

Guofang Wu

Lei Wang

Guangyong Qin

Yanping Wang

Huili Pang

Affiliations

Soon will be listed here.

Abstract

Mycotoxins, secondary metabolites of fungi, are a major obstacle to the utilization of animal feed for various reasons. Wheat straw (WS) is hollow, and miscellaneous bacteria can easy attach to its surface; the secondary fermentation frequency after silage is high, and there is a risk of mycotoxin poisoning. In this study, a storage fermentation process was used to preserve and enhance fermentation quality in WS through the addition of Artemisia argyi (AA), which is an effective method to use WS resources and enhance aerobic stability. The storage fermentation of WS treated with AA had lower pH and mycotoxin (AFB1 and DON) values than the control due to rapid changes in microbial counts, especially in the 60% AA groups. Meanwhile, the addition of 60% AA improved anaerobic fermentation profiles, showing higher lactic acid contents, leading to increased efficiency of lactic acid fermentation. A background microbial dynamic study indicated that the addition of 60% AA improved the fermentation and aerobic exposure processes, decreased microbial richness, enriched abundance, and reduced and abundances. In conclusion, 60% AA treatment could improve the quality by increase fermentation quality and improve the aerobic stability of WS silage by enhancing the dominance of desirable , inhibiting the growth of undesirable microorganisms, especially fungi, and reducing the content of mycotoxins.

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