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  Artificial humic acid improves maize growth and soil phosphorus utilization efficiency

Yuan, Y., Gai, S., Tang, C., Jin, Y., Cheng, K., Antonietti, M., et al. (2022). Artificial humic acid improves maize growth and soil phosphorus utilization efficiency. Applied Soil Ecology, 179: 104587. doi:10.1016/j.apsoil.2022.104587.

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Genre: Journal Article

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 Creators:
Yuan, Yue1, Author
Gai, Shuang1, Author
Tang, Chunyu1, Author
Jin, Yongxu1, Author
Cheng, Kui1, Author
Antonietti, Markus2, Author           
Yang, Fan1, Author           
Affiliations:
1NEAU-MPICI, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3235412              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: Abiotic mechanisms; Acid phosphatase; Artificial humic substances; Maize growth; Phosphate-solubilizing bacteria
 Abstract: Phosphorus is one of the largest nutrients limiting crop productivity. Humic substances, as macromolecular polymers, are potential carbon materials responsible for soil additives to increase soil phosphorus utilization and mitigate phosphorus loss. However, the effect of artificial humic substances (A-HS) on maize agronomic traits and soil phosphorus transformation in black soil areas has not been investigated, and the mechanisms by which it affects phosphorus utilization by seedlings remain unclear. In this study, phosphate fertilizer and A-HS are jointly applied to a model soil, and maize growth and the soil phosphorus availability are determined at various A-HS concentrations in greenhouses using the root-bag technique. Herein, A-HS includes artificial humic acid and fulvic acid with commercial humic acid for comparisons. Positive effects on agronomic traits and phosphorus uptake in maize seedlings were quantified. As A-HS also influences the soil microbiome, the present study further explored the changing trend of soil acid phosphatase and phoC gene community structure by high-throughput sequencing techniques, using the Illumina MiSeq platform with Functional Annotation of Uparse annotation, to provide insights into how A-HS affects microbially mediated phosphorus transformation. The study found a declining alpha diversity of phoC microbial communities in rhizosphere and bulk soil. A-HS affects the structure of maize rhizosphere and bulk soil microbial communities and enhances soil phosphorus effectiveness and nutrient uptake by maize. As a general result, this study supports that the application of artificial humic acid in sustainable farming techniques can not only increase phosphorus availability in farmland but also stimulate the formation of a healthy soil microbiome.

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Language(s): eng - English
 Dates: 2022-11-012022
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.apsoil.2022.104587
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Title: Applied Soil Ecology
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 179 Sequence Number: 104587 Start / End Page: - Identifier: ISSN: 0929-1393