Bentonite-Based Organic Amendment Enriches Microbial Activity in Agricultural Soils | Land Portal

Resource information

Date of publication: 
August 2020
Resource Language: 
ISBN / Resource ID: 
10.3390/land9080258
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Copyright details: 
© 2020 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article.

Bentonite-based organic amendments may have the potential to enhance soil microbial properties. The experiment was carried out from 2014 to 2017 comprising four treatments: NPK fertilizer (nitrogen, phosphorus and potassium mineral fertilizer as a control), NPK + cattle manure, NPK + bentonite, and NPK + combination of manure with bentonite (MB) to verify this hypothesis. The effect of treatments on seven different soil microbial properties was measured: dehydrogenase activity (DHA), bacterial phospholipid fatty acid content, fungal phospholipid fatty acid content, microbial biomass carbon (Cmic), 16S rDNA, 18S rDNA, and ammonia-oxidizing bacteria in soil. The results showed that solely bentonite treatment increases the bacterial and fungal biomass, which was further confirmed by the increased 16S rDNA and 18s rDNA gene copy numbers. The only significantly decreased values upon treatment with solely bentonite were recorded for DHA and Cmic. The ammonia-oxidizing bacteria population increased with the sole application of bentonite and reached its maximum value when bentonite was applied with manure. The MB treatment showed the highest value for all seven measured properties. In summary, the application of bentonite solely might increase or decrease the soil activity, but its addition, along with manure, always promotes an abundance of soil microorganisms and their activity. The co-application of bentonite with manure altered the soil microbial properties in a 3-year field experiment in favor of increased microbial biomass, which is beneficial for agriculture and environment and reveals the potential for the restoration of polluted lands.

Authors and Publishers

Author(s), editor(s), contributor(s): 

Datta, Rahul
Holatko, Jiri
Latal, Oldrich
Hammerschmiedt, Tereza
Elbl, Jakub
Pecina, Vaclav
Kintl, Antonin
Balakova, Ludmila
Radziemska, Maja
Baltazar, Tivadar
Skarpa, Petr
Danish, Subhan
Zafar-ul-Hye, Muhammad
Vyhnanek, Tomas
Brtnicky, Martin

Publisher(s): 

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