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- Title
Synthetic Humic Acids Solubilize Otherwise Insoluble Phosphates to Improve Soil Fertility.
- Authors
Yang, Fan; Zhang, Shuaishuai; Song, Jingpeng; Du, Qing; Li, Guixiang; Tarakina, Nadezda V.; Antonietti, Markus
- Abstract
Artificial humic acids (A‐HA) made from biomass in a hydrothermal process turn otherwise highly insoluble phosphates (e.g. iron phosphate as a model) into highly available phosphorus, which contributes to the fertility of soils and the coupled plant growth. A detailed electron microscopy study revealed etching of the primary iron phosphate crystals by the ‐COOH and phenolic groups of humic acids, but also illustrated the importance of the redox properties of humic matter on the nanoscale. The combined effects result in the formation of then bioavailable phosphate nanoparticles stabilized by humic matter. Typical agricultural chemical tests indicate that the content of total P and directly plant‐available P improved largely. Comparative pot planting experiments before and after treatment of phosphates with A‐HA demonstrate significantly enhanced plant growth, as quantified in higher aboveground and belowground plant biomass.
- Subjects
HUMIC acid; SOIL fertility; PLANT biomass; PHOSPHATES; PROPERTIES of matter; BIOFERTILIZERS
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 52, p18989
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201911060