Effects of Dazomet Fumigation on Soil Phosphorus and the Composition of phoD-Harboring Microbial Communities

Abstract

The soil phosphorus (P) cycle and P transformation are largely driven by the soil bacterial microbial community. However, little is known about the effects of dazomet (DZ) soil fumigation on soil P and soil microbial communities associated with P transformation. This research investigated P released from three farm soils as a result of DZ fumigation and changes in enzyme activity, gene abundance, and the encoding alkaline phosphatase PhoD microbial community. After DZ fumigation, we observed a briefly significant increase in the available P and the active P fractionation. The soil ALP activity, 16s rRNA abundance, and the phoD gene decreased significantly after DZ fumigation. The abundance and diversity of phoD-harboring microbes also decreased shortly after fumigation, increased significantly 14–28 days later, and then decreased again toward the end of the experimental period of 86 days. The shared OTUs between treatments became fewer with increasing time after fumigation. The changes in available P and the active P fractionation after DZ fumigation were significantly correlated with the abundance of the dominant phoD-harboring microbes. DZ fumigation promoted P mineralization in these farm soils and changed the composition of phoD-harboring microbial communities, which will benefit crops able to absorb and use P.

Fungicides alter the distribution and diversity of bacterial and fungal communities in ginseng fields

“…More specifically, the class Actinobacteria was dominant in E (47.45%) while Alphaproteobacteria reduced from 15.29 to 4.84 % and minimum in E. The abundance of Ktedonobacteria and Gammaproteobacteria were increased (6.09-1.09% and 5.11-12.32%) as well as richest in D treated soil, and the richest genus of Arthrobacter and Bacillus were highest in E (19.74% and 4.45%) (Figure1). Similarly, Huang et al[23] observed significantly increased in Arthrobacter abundance in dazomet treated soil, which might be attributed by Arthrobacter ability to degrade dazomet as a nutrient source.…”

Effects of Chemical and Solar Soil-Disinfection Methods on Soil Bacterial Communities

“…In particular, the soil bacterial community structure significantly changed after DZ and CP fumigation. In many studies, DZ fumigation significantly altered the bacterial abundance as well as the abundance, diversity, and composition of the overall microbial community [53,54]. The results showed that Firmicutes were the predominant phylum, accounting for 47.4% of the total bacterial flora.…”

Opportunities and Challenges in Studies of Host-Pathogen Interactions and Management of Verticillium dahliae in Tomatoes

“…When fumigants (DMDS, chloropicrin, 1,3-D) were used alone, a higher dosage was required for V. dahliae and Meloidogyne incognita suppression, but when any two of these fumigants were combined, the lower dosage was effective [144]. Dazomet was also reported to promote phosphorus mineralization and allowed crops to absorb and use phosphorus [145].…”