Alkaline extraction of humic substances from peat applied to organic-mineral fertilizer production

Brazilian Journal of Chemical Engineering

B. Saito²  M. M. Seckler¹ 

[1] ,Institute of Technological Research of the Estate of São PauloSão Paulo SP ,Brazil

关键词: Peat;    Humic substance;    Humic acid;    Fertilizer;    Organic-mineral fertilizer;    Alkaline extraction;   

DOI  :  10.1590/0104-6632.20140313s00002512

来源: SciELO

【 摘 要 】

An organic-mineral fertilizer based on humic substances (HSs) and potassium was developed based on the alkaline extraction of HSs from peat. The HSs have interesting properties for use as a fertilizer since they improve the physical and chemical structure of the soil and provide a source of organic carbon which is readily absorbable by the plants, whereas potassium is a primary nutrient for plants. It was found that highly decomposed peats containing a small inorganic fraction are more favorable for the extraction of HSs. Using these peats, organic-mineral fertilizers that meet the Brazilian legislation have been obtained for a peat-extractant mixture containing 2.57 wt% total organic content (TOC), a K2O/TOC ratio of 1 wt% and an extraction time of 12 hours.

【 授权许可】

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