Arbuscular Mycorrhizal Fungi for Sustainability and Climate-Smart Agriculture: glomalin and land management

Proceedings of The 3rd World Conference on Climate Change and Global Warming

Year: 2023

DOI:

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Arbuscular Mycorrhizal Fungi for Sustainability and Climate-Smart Agriculture: glomalin and land management

Tünde Takács, Bettina Kelemen, Katica Kocsis, Sándor Pabar4,Ambrus Rév, Péter Juhász, Anna Füzy

ABSTRACT: 

Soil carbon stock fundamentally determines soil fertility, it affects aggregates, water storage, chemical properties, protective functions of soil and it has an important role in the regulation of many atmospheric constituents. The importance of arbuscular mycorrhizal fungi (AMF) is undoubted in facilitating carbon conservation of soils through affecting host plant productivity and through glomalin production.  Glomalin produced by AMF hyphae forms a significant part of soil organic carbon. However, intensive fertilization and tillage harm AMF diversity and functions just like glomalin production. The effect of soil management on glomalin (easily extracted Glomalin-related soil protein; EE-GRSP) has been examined at sites of three long-term field experiments: (1) NPK fertilization experiment treated with and without farmyard manure; (2) conventional and organic farming fields and (3) tillage, mouldboard ploughing and deep cultivation treatments were tested. There were no significant correlation found between the root colonization parameters and the soil glomalin content, however, close correlations were detected between the SOM, the pH, the soil N content, the humus quality parameters, the macroaggregate stability and the EE-GRSP. The effect of seasonality and host plant species were marginal. The soil disturbance had the most significant effect on soil EE-GRSP. The synthesis of our data could result in a land use effect assessment considering the quantitative conditions of the soil glomalin. Glomalin is not just a C storage, but it is also a very important soil health indicator. The project was funded by the Eötvös Loránd Research Network (SA-26/2021) and Hungarian Academy of Sciences (FFTNP).

keywords: glomalin, soil health bioindication, long-term field experiments, organic farming system, tillage