scholarly journals Effect of Different Doses of Ash from Biomass Combustion on the Development of Diatom Assemblages on Podzolic Soil under Oilseed Rape Cultivation

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2422
Author(s):  
Jadwiga Stanek-Tarkowska ◽  
Małgorzata Szostek ◽  
Mateusz Rybak

The aim of the study was to determine the effect of fertilization with various doses of ash from biomass combustion (balanced to the amount of K2O introduced into the soil) on the growth of representatives of soil microorganisms, i.e., diatoms. In a one-factor field experiment (control, NPK, 100, 200, 300, 400, 500 kg/ha), soil samples were collected from the 0–5 cm layer of podzolic soil under the cultivation of winter oilseed rape (Brassica napus L. var. napus) at the end of August 2019 and 2020. The biomass combustion ash used for soil fertilization was characterized by an alkaline reaction (pH = 12.83 ± 0.68) and high levels of basic macroelements required for proper plant growth and development. The particle size distribution in each plot was identified as loamy silt (pgl). Before the experiment (autumn 2018), the soil exhibited an acidic reaction (pHH2O = 5.8), low conductivity (EC = 68 µS), and 19.09% moisture at the 0–5 cm level. In total, 23 diatom species were identified in the material collected from the topsoil in all variants of the experiment. Hantzschia amphioxys, Mayamaea atomus, Mayamaea permitis, Nitzschia pusilla, Pinnularia obscura, Pinnularia schoenfelderi, and Stauroneis thermicola were the most abundant populations.

2020 ◽  
Vol 21 (22) ◽  
pp. 8740
Author(s):  
Daria Chlebek ◽  
Artur Pinski ◽  
Joanna Żur ◽  
Justyna Michalska ◽  
Katarzyna Hupert-Kocurek

Endophytic bacteria hold tremendous potential for use as biocontrol agents. Our study aimed to investigate the biocontrol activity of Pseudomonas fluorescens BRZ63, a new endophyte of oilseed rape (Brassica napus L.) against Rhizoctonia solani W70, Colletotrichum dematium K, Sclerotinia sclerotiorum K2291, and Fusarium avenaceum. In addition, features crucial for biocontrol, plant growth promotion, and colonization were assessed and linked with the genome sequences. The in vitro tests showed that BRZ63 significantly inhibited the mycelium growth of all tested pathogens and stimulated germination and growth of oilseed rape seedlings treated with fungal pathogens. The BRZ63 strain can benefit plants by producing biosurfactants, siderophores, indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC) deaminase, and ammonia as well as phosphate solubilization. The abilities of exopolysaccharide production, autoaggregation, and biofilm formation additionally underline its potential to plant colonization and hence biocontrol. The effective colonization properties of the BRZ63 strain were confirmed by microscopy observations of EGFP-expressing cells colonizing the root surface and epidermal cells of Arabidopsis thaliana Col-0. Genome mining identified many genes related to the biocontrol process, such as transporters, siderophores, and other secondary metabolites. All analyses revealed that the BRZ63 strain is an excellent endophytic candidate for biocontrol of various plant pathogens and plant growth promotion.


Planta ◽  
2004 ◽  
Vol 221 (3) ◽  
pp. 328-338 ◽  
Author(s):  
Jens Tilsner ◽  
Nina Kassner ◽  
Christine Struck ◽  
Gertrud Lohaus

1997 ◽  
Vol 150 (4) ◽  
pp. 414-419 ◽  
Author(s):  
Jeroen A. Wilmer ◽  
Johannes P.F.G. Helsper ◽  
Linus H.W. van der Plas

2014 ◽  
Vol 37 (3) ◽  
pp. 556-559 ◽  
Author(s):  
Lenka Havlícková ◽  
Eva Jozová ◽  
Miroslav Klíma ◽  
Vratislav Kucera ◽  
Vladislav Curn

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