Dragon bamboo (Dendrocalamus giganteus) is a giant sympodial
bamboo species widely distributed in Asia. However,
it remains unclear how dragon bamboo and soil microbes interact
to affect soil properties. In this study, we investigated
the planting patterns (semi-natural and artificial) on different
slopes (sunny and shady) to determine the effects on soil properties
and microbial community. The results showed that
the soil in which dragon bamboo was grown was acidic, with
a pH value of ~5. Also, the soil organic matter content, nitrogen
hydrolysate concentration, total nitrogen, available potassium,
and total potassium of the dragon bamboo seminatural
forest significantly improved, especially on the sunny
slope. In contrast, the available phosphorus level was higher
in the artificial bamboo forest, probably owing to the phosphate
fertilizer application. The bacterial and fungal diversity
and the bacterial abundance were all higher on the sunny
slope of the semi-natural forest than those in the other samples.
The microbial operational taxonomic units (OTUs)
shared between the shady and sunny slopes accounted for
47.8–62.2%, but the core OTUs of all samples were only 24.4–
30.4% of each sample, suggesting that the slope type had a
significant effect on the microbial community. Some acidophilic
microbes, such as Acidobacteria groups, Streptomyces
and Mortierella, became dominant in dragon bamboo forest
soil. A PICRUSt analysis of the bacterial functional groups
revealed that post-translational modification, cell division,
and coenzyme transport and metabolism were abundant in
the semi-natural forest. However, some microorganisms with
strong stress resistance might be activated in the artificial
forest. Taken together, these results illustrated the influence
of dragon bamboo growth on soil physicochemical property
and microbial community, which might help understand the
growth status of dragon bamboo under different planting
patterns.
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