ArticlePlants (Basel, Switzerland)2026
Is Early Tobacco-Rice Rotation Associated with Soil Nutrient Legacy and Shifts in Bacterial Ecological Potential in a Subtropical Paddy System?
Article in Plants (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In subtropical double-rice regions, replacing early-season rice with tobacco may alter the soil environment inherited by subsequent paddy cultivation. We conducted a one-year field experiment in 2023 to compare rice-rice (RR) and tobacco-rice (TR) pathways. Soils from the 0-10 and 10-20 cm layers were sampled during the early-season pathway-differentiation period and the late-season rice-growing period, and soil properties, bacterial 16S rRNA communities, predicted functional profiles, and rice agronomic traits were analyzed. Relative to RR, TR was associated with 4.12% lower grain yield but 5.10% higher 1000-grain weight and 23.74% higher aboveground dry matter, indicating altered yield formation rather than uniform growth suppression. TR was also associated with lower soil organic carbon (SOC), total nitrogen (TN), alkali-hydrolyzable nitrogen (AN), and available phosphorus (AP). Bacterial communities differed between pathways, with stronger
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