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Effects of Dazomet Fumigation on Soil Phosphorus and the Composition of phoD-Harboring Microbial Communities
journal contribution
posted on 2020-03-24, 12:08 authored by Bin Huang, Dongdong Yan, Qiuxia Wang, Wensheng Fang, Zhaoxin Song, Hongyan Cheng, Yuan Li, Canbin Ouyang, Qingli Han, Xi Jin, Aocheng CaoThe 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.