A rice variety with a high straw biomass retained nitrogen and phosphorus without affecting soil bacterial species

Abstract

It is well documented that rice paddy fields act as agricultural wetlands that remove or retain nutrients; however, their associated effects on soil microbial communities are rarely reported. The present study evaluates the impact of rice variety on nutrient removal via plant uptake, nutrient retention in the soil, and bacterial associations in rice paddy fields, using a network analysis that compares the soil bacterial communities of two rice varieties. We found that the high-straw rice variety (YD-1) allows uptake of a high amount of nitrogen (N) and phosphorus (P) from paddy rice fields via harvesting, but causes less residual total N and P to remain in the soil. However, both rice varieties (YD-1 and XS-134 (Xiushui-134)) had non-significant effects on the dominant bacterial taxa. The short-term response of bacterial community diversity to rice variety is found to be mainly due to less frequently recovered species. A network analysis that incorporates soil nutrients as nodes, along with bacterial taxa, found that only one node representing the total P related to the non-dominant species had an indirect association with the rice straw biomass. The observed short-term impact of the two rice varieties (XS-134 and YD-1) on soil bacterial diversity and nutrient surplus in these agricultural wetlands is limited under a high level of fertilization.

Urbanization pressures alter tree rhizosphere microbiomes

“…Acidobacteria Bryobacter, characterized as an aerobic chemo-organotrophic bacterium capable of utilizing various sugars, polysaccharides, and organic acids, plays a significant role in the C cycle 61 . In our forest edges, abundance of Bryobacter increased with soil OM content and concentrations of P with urbanization (Sup Table 2 & 4 ) suggesting Bryobacter is directly linked to P availability and soil OM content 62 . However, we observed no relationship between Bryobacter relative abundance (%) and P concentrations or organic matter across all of our forest soils (p > 0.10).…”

Soil bacterial community response to rhizoma peanut incorporation into Florida pastures

“…Other research has identified positive correlations between the abundance of Bryobacter and soil phosphorous availability (Liang et al., 2020; Malviya et al., 2021; Rosier et al., 2021). Bryobacter , along with other dominant soil genera in this study, likely contribute significantly to soil nutrient and carbon cycling processes.…”

Effects of Strigolactone on Torreya grandis Gene Expression and Soil Microbial Community Structure Under Simulated Nitrogen Deposition

“…The relative abundance of Bryobacter increased under GR24 treatment. Abundance of Bryobacter was positively correlated with soil health and directly correlated with available P concentration ( Huang et al, 2020 ; Liang et al, 2020 ). These results indicate suggest that SLs promote increase in abundance of beneficial bacteria and reduction of harmful bacteria in soil.…”