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Influences of tobacco straw return with lime on microbial community structure of tobacco-planting soil and tobacco leaf quality

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Abstract

Soil amendment is an important strategy for improving soil quality and crop yield. From 2014 to 2019, we conducted a study to investigate the effects of tobacco straw return with lime on soil nutrients, soil microbial community structure, tobacco leaf yield, and quality in southern Anhui, China. A field experiment was conducted with four treatments: straw removed (CK), straw return (St), straw return with dolomite (St + D), and straw return with lime (St + L). Results showed that after 5 years of application, the St + L significantly increased the soil pH by 16.9%, and the contents of soil alkaline nitrogen (N) and available potassium (K) by 17.2% and 23.0%, respectively, compared with the CK. Moreover, the St + L significantly increased tobacco leaf yield (24.0%) and the appearance (9.1%) and sensory (5.9%) quality of flue-cured tobacco leaves. The addition of soil conditioners (straw, dolomite, and lime) increased both the total reads and effective sequences of soil microorganisms. Bacterial diversity was more sensitive to changes in the external environment compared to soil fungi. The application of soil amendments (lime and straw) promoted the growth of beneficial microorganisms in the soil. Additionally, bacterial species had greater competition and limited availability of resources for survival compared to fungi. The results showed that soil microorganisms were significantly influenced by the presence of AK, AN, and pH contents. These findings can provide an effective method for improving the quality of flue-cured tobacco leaves and guiding the amelioration of acidic soil in regions where tobacco-rice rotation is practiced.

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Funding

This work was funded by the National Natural Science Foundation of China (grant numbers: 41271320).

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CJ: data curation, writing—original draft, and writing—review and editing; RM: review and editing; CZ: supervision and funding acquisition; CL, QZ, and XH: investigation and data correction. QD: writing—original draft; JS: writing—review and editing, and funding acquisition. All authors contributed to the article and approved the submitted version.

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Correspondence to Jia Shen.

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Jiang, C., Zu, C., Riaz, M. et al. Influences of tobacco straw return with lime on microbial community structure of tobacco-planting soil and tobacco leaf quality. Environ Sci Pollut Res 31, 30959–30971 (2024). https://doi.org/10.1007/s11356-024-33241-w

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  • DOI: https://doi.org/10.1007/s11356-024-33241-w

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