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Evolution of Red Soil Fertility and Response of Rice Yield Under Long-Term Fertilization

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Abstract

[Purpose] In order to evaluate the evolutionary trends of integrated fertility in red soil rice fields under different long-term fertilization regimes. [Methods] This study was based on the long-term fertilization experiment from 1982, including seven treatments: CK (no fertilization), NPK (nitrogen, phosphorus, and potassium fertilizer), M (cow manure), NPKM, NPM, NKM, and PKM. Soil nutrient and yield data recorded over 40 years were analyzed, and the Nemero index method was used to comprehensively evaluate soil fertility. [Results] Under long-term fertilization, the soil integrated fertility index (IFI) of each experimental treatment ranged from high to low as follows: NPKM > NPM > PKM > NKM > M > NPK > CK. The soil IFI of the CK, NPK, and M treatments was significantly lower than that of the NPKM, NPM and PKM treatments that combined both organic and inorganic fertilizers. Soil IFI was significantly positively correlated with the contents of soil organic matter, total N, available N, total P, Olsen P and available K. The IFI was significantly and positively correlated with rice yield. NPKM, NPM, NKM, and PKM had relatively high integrated fertility and rice yield, whereas the CK, NPK, and M treatments had low integrated fertility and crop yield. Furthermore, NPKM, NPM, and NKM treatments of rice achieved high yields while maintaining high yield stability and sustainability. [Conclusion] Long-term organic-inorganic fertilization promotes the improvement of integrated red soil fertility, NPKM treatment can maintain high rice yield and yield stability and sustainability, making it a recommended fertilization measure.

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Acknowledgements

We appreciate all the managers for the long-term experiment. This study was financially supported by Natural Science Foundation of Sicuhan Province, China (2022NSFSC1059, 2022NSFSC1646), the Open fund of key Laboratory of Waste Fertilizer Utilization, Ministry of Agriculture and Rural Affairs, China (KLFAW202203), and the Development Program of Hunan Province, China (2021WK2008).

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Correspondence to Tuo Zhang or Huimin Zhang.

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Gao, P., Zhang, T., Cui, X. et al. Evolution of Red Soil Fertility and Response of Rice Yield Under Long-Term Fertilization. J Soil Sci Plant Nutr (2024). https://doi.org/10.1007/s42729-024-01718-9

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  • DOI: https://doi.org/10.1007/s42729-024-01718-9

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