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Limited effectiveness of selected bioeffectors combined with recycling phosphorus fertilizers for maize cultivation under Swiss farming conditions

Symanczik, Sarah; Lipp, Carina; Mäder, Paul; Thonar, Cécile and Kundel, Dominika (2023) Limited effectiveness of selected bioeffectors combined with recycling phosphorus fertilizers for maize cultivation under Swiss farming conditions. Frontiers in Plant Sciences, 14, pp. 1-12.

[thumbnail of symanczik-etal-2023-ForntiersPlantSci-Vol14-No1239393-p1-12.pdf] PDF - Published Version - English
Available under License Creative Commons Attribution.


Document available online at: https://pubmed.ncbi.nlm.nih.gov/37719227/


The use of plant biostimulants, also known as bioeffectors (BEs), has attracted increasing attention as an environmentally friendly strategy for more sustainable crop production. BEs are substances or microorganisms that are applied to plants or the surrounding soil to stimulate natural processes to enhance nutrient uptake, stress tolerance, and plant growth. Here, we tested the effectiveness of five BEs to enhance maize growth and phosphorus (P) uptake from various recycled P fertilizers in a series of pot and field experiments. First, the impact of two bacterial BEs and one soil-specific plant-based BE on crop performance was assessed in a 4-week screening experiment conducted in two arable, P-deficient soils of differing soil pH (a silty clay loam of pH 7.1 and a silty loam of pH 7.8) amended with recycled P-fertilizers (rock phosphate, biogas digestate, green waste compost, composted dairy manure, and chicken manure pellets). Then, for each soil type, the plant growth-promoting effect of the most promising BE-fertilizer combinations was re-assessed in an 8-week experiment. In addition, over a period of up to 3 years, three field experiments were conducted with maize in which up to two bacterial BEs were used either alone or in combination with a plant-based BE. Our experiments show that while BEs in combination with specific P-fertilizers can promote maize growth within the first weeks of growth under controlled conditions, the observed effects vanished in the long term, both in pots and under field conditions. In a tracing experiment, in which we tested the persistence of one bacterial BE over a period of 5 weeks, we observed a drastic decrease in colony-forming units already 2 weeks after inoculation. As previously shown in other studies, our data indicate that the plant growth-promoting effects of BEs found under controlled conditions are not directly transferable to field conditions. It is suggested that the drastic decline in inoculated bacterial strains in the tracing experiment is the reason for the decline in plant growth effect.

EPrint Type:Journal paper
Keywords:BIOFECTOR, bacillus, bioeffectors, field trial, humic acids, pseudomonas, seaweed, Abacus, FiBL10068
Agrovoc keywords:
field trials -> field experimentation
Subjects: Soil > Soil quality
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Composting and manuring
Research affiliation:Belgium > Wallonia > Other Organizations Wallonia
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Crop protection > Biocontrol
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Nutrient management
Related Links:https://www.fibl.org/en/themes/projectdatabase/projectitem/project/621, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10501308/pdf/fpls-14-1239393.pdf
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:51703
Deposited On:27 Sep 2023 11:18
Last Modified:27 Sep 2023 11:18
Document Language:English
Refereed:Peer-reviewed and accepted

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