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The Effects of Acidic Compost Tea on Activation of Phosphorus, Fe, Zn, and Mn in Calcareous Soil and Cotton (Gossypium hirsutum L.) Growth in **njiang, China

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Abstract

Calcareous soil has a strong fixation effect on phosphorus (P), iron (Fe), manganese (Mn), and zinc (Zn), including on the interaction between these elements by limiting their availability and absorption by cotton. Therefore, we propose employing acidic composted tea (CT) to alleviate their contradiction. A pot experiment was set up to explore the CT effect on cotton leaf gas-exchange measurements, availability of P, Fe, Mn, and Zn in calcareous soil, their relationship, and absorption by cotton. The net photosynthetic rate (Pn) of fertilization treatments increased by 62.7–65.1% compared with unfertilized control (p < 0.05); compared with organic fertilizer application, CT application reduced soil pH by 1%, increased the soil’s Olsen-P by 25.2%, mainly originating from NaOH-P dissolution, and increased the available Fe and Mn by 23.0% and 1.1%, respectively; however, available Zn decreased due to its absorption by cotton. CT also increased trace element accumulation in cotton plants, which significantly affected cotton dry matter and yield. Available soil P increment had no antagonistic effect on trace element availability and accumulation. In contrast, CT promoted P, Fe, Mn, and Zn accumulation in cotton plants, with a synergistic relationship between the absorption of various elements. Fe, Mn, and Zn were constantly removed; hence, they should be supplemented to maintain trace element balance. This study provided new material and methods for managing P and trace elements in calcareous soil.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (31660598 and 31360501) and Key Laboratory of Oasis Ecoagriculture, **njiang Production and Construction Corps/College of Agronomy, Shihezi University. We thank Junhua Li for his guidance in manuscript revision, and Cheng Shuai from Shiyanjia Lab (www.shiyanjia.com) for improving the English.

Funding

This research was supported by the National Natural Science Foundation of China (31660598, 31360501).

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All authors designed the study. T. L. and S. B. R. collected the data. T. L., W. D. L., L. L. C., and T. M. quantified recordings, ran statistical analyses, and drafted the manuscript. T. L., J. H. L., and C. Z.W. improved the quality of language. All authors read, revised, and approved the manuscript.

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Correspondence to Junhua Li.

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Luo, T., Lu, W., Chen, L. et al. The Effects of Acidic Compost Tea on Activation of Phosphorus, Fe, Zn, and Mn in Calcareous Soil and Cotton (Gossypium hirsutum L.) Growth in **njiang, China. J Soil Sci Plant Nutr 22, 3822–3834 (2022). https://doi.org/10.1007/s42729-022-00933-6

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  • DOI: https://doi.org/10.1007/s42729-022-00933-6

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