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The effect of leonardite-derived amendments on soil microbiome structure and potato yield

  • Humic substances originating from various organic matters can ameliorate soil properties, stimulate plant growth, and improve nutrient uptake. Due to the low calorific heating value, leonardite is rather unsuitable as fuel. However, it may serve as a potential source of humic substances. This study was aimed at characterizing the leonardite-based soil amendments and examining the effect of their application on the soil microbial community, as well as on potato growth and tuber yield. A high yield (71.1%) of humic acid (LHA) from leonardite has been demonstrated. Parental leonardite (PL) and LHA were applied to soil prior to potato cultivation. The 16S rRNA sequencing of soil samples revealed distinct relationships between microbial community composition and the application of leonardite-based soil amendments. Potato tubers were planted in pots in greenhouse conditions. The tubers were harvested at the mature stage for the determination of growth and yield parameters. The results demonstrated that the LHA treatments had a significant effect on increasing potato growth (54.9%) and tuber yield (66.4%) when compared to the control. The findings highlight the importance of amending leonardite-based humic products for maintaining the biogeochemical stability of soils, for keeping their healthy microbial community structure, and for increasing the agronomic productivity of potato plants.

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Metadaten
Author:Nuraly Akimbekov, Xiaohui Qiao, Ilya DigelORCiD, Gulzhamal Abdieva, Perizat Ualieva, Azhar Zhubanova
DOI:https://doi.org/10.3390/agriculture10050147
Parent Title (English):Agriculture
Publisher:MDPI
Place of publication:Basel
Document Type:Article
Language:English
Year of Completion:2020
Date of the Publication (Server):2020/08/07
Volume:10
Issue:Art. 147
First Page:1
Last Page:17
Link:https://doi.org/10.3390/agriculture10050147
Zugriffsart:weltweit
Institutes:FH Aachen / Fachbereich Medizintechnik und Technomathematik
FH Aachen / IfB - Institut für Bioengineering
collections:Verlag / MDPI
Open Access / Gold
Licence (German):License LogoCreative Commons - Namensnennung