With the widespread application of fulvic acid (FA) in agriculture, improving the industrial yield of FA has become an urgent priority. Therefore, it is particularly important to explore efficient and clean process conditions for the factory production of FA from low-rank coal, as undertaken in this study. Additionally, an in-depth study of the biological activity of FA was performed to provide a theoretical reference for its practical application.

中文翻译：

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柠檬酸-乙醇法提取黄腐酸及其生化活性

随着黄腐酸（FA）在农业中的广泛应用，提高FA的工业产量已成为当务之急。因此，正如本研究所开展的那样，探索从低阶煤工厂化生产 FA 的高效清洁工艺条件尤为重要。此外，还对FA的生物活性进行了深入研究，为其实际应用提供理论参考。