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论述腐植酸的组成、分类,腐植酸在改良土壤、增加肥效、增加药效、提高植物品质、保持生态环境等方面的作用,以及对植物生长的刺激作用。
Discusses the composition and classification of humic acid, the role of humic acid in improving soil, increasing fertilizer efficiency, increasing efficacy, improving plant quality, maintaining ecological environment, and stimulating plant growth.