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

Authors :
Ouyang Canbin
Aocheng Cao
Hongyan Cheng
Zhaoxin Song
Yuan Li
Xi Jin
Dongdong Yan
Bin Huang
Wensheng Fang
Qiuxia Wang
Qingli Han
Source :
Journal of Agricultural and Food Chemistry. 68:5049-5058
Publication Year :
2020
Publisher :
American Chemical Society (ACS), 2020.

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.

Details

ISSN :
15205118 and 00218561
Volume :
68
Database :
OpenAIRE
Journal :
Journal of Agricultural and Food Chemistry
Accession number :
edsair.doi...........9fb5d58b5268fbf5fd2e60dc28846367
Full Text :
https://doi.org/10.1021/acs.jafc.9b08033