
Agricultural and Biosystems Engineering Publications
Document Type
Article
Publication Date
2014
Journal or Book Title
Transactions of the ASABE
Volume
57
Issue
6
First Page
1803
Last Page
1810
DOI
10.13031/trans.57.10622
Abstract
Anaerobic digestion is one of the most popular methods for swine manure treatment in China, and the resultant digestates are mainly used as fertilizer on arable land. Residues from anaerobic fermentation may be used to mitigate the use of chemical fungicides, but relevant information is lacking. In this lab-scale study, original digestate (OD) from a swine manure-fed digester and centrifuged supernatant liquid (SL) with different storage times (0, 7, 14, or 28 d) were added to potato dextrose agar (PDA) media at a rate of 5% to investigate the effects on in vitro mycelial growth of seven phytopathogenic fungi: Fusarium oxysporum, Sclerotinia sclerotiorum, Rhizotonia cerealis, Bipolaris sorokinianum, Rhizoctonia solani, Exserohilum turcicum, and Bipolaris maydis. Diameters of the fungal colonies were measured at 1 d intervals for 7 consecutive days, and the absolute growth rate (AGR) and growth coefficient (k) were calculated. Results showed that the colony sizes of Fusarium oxysporum, Sclerotinia sclerotiorum, Rhizotonia cerealis, Bipolaris sorokinianum, and Rhizoctonia solani on the OD-treated media were significantly smaller (p < 0.01) than the corresponding controls regardless of the storage time. Similarly, independent of storage time, SL-treated media were shown to significantly (p < 0.01) suppress AGR compared to the controls for all seven fungi except for Exserohilum turcicum, where no significant difference was observed between the 14-day-old SL treatment and control. The average k values of the fungi on the OD-treated media ranged from 29% to 143% of the values on the SL-treated media. The results of this study suggest potential use of digestate for plant disease control, which would reduce the use of chemical fungicides. Further studies are needed to investigate the fungicidal mechanism and fungicidal efficacy of OD and SL under field conditions.
Access
Open
Copyright Owner
American Society of Agricultural and Biological Engineers
Copyright Date
2014
Language
en
File Format
application/pdf
Recommended Citation
Tao, Xiuping; Shang, Bin; Dong, Hongmin; Chen, Yongxin; and Xin, Hongwei, "Effects of Digestate from Swine Manure Digester on in Vitro Growth of Crop Fungal Pathogens: A Laboratory Study" (2014). Agricultural and Biosystems Engineering Publications. 617.
https://lib.dr.iastate.edu/abe_eng_pubs/617
Comments
This article is from Transactions of the ASABE 57 (2014): 1803–1810, doi:10.13031/trans.57.10622. Posted with permission.