Application of Growth Regulators and Saprophytic Fungi Trichoderma viride Pers ex Fr. to Improve the Sanitary Condition of the Soil under Pepper Crops
2020
Olga Georgieva | Natalia Karadzhova
The article presents studies of the effect of the microbiological preparation"Trichodermine", bio-organic fertilizers and growth regulators based on humic acids "Nagro","Stimix", "BioLife" and mineral fertilizers (NPK) on the biological activity of the soil, thedegree of disease caused by Alternaria capsici-annui Savul & Sandu and the yield of pepper inthe field. It was found that the differences in the indicator "Biological Activity of the Soil"depend on the number of microorganisms, the composition (species diversity) and thepercentage of the main Micromycetes. Organic products help to optimize soil health andreduce the total content of fungal colonies, and in the composition of Micromycetes, thefungus Trichoderma sp. is more common. When mineral fertilizers are applied, the number offungal pathogens and toxin producers increases. A higher total yield was obtained in thevariants with biological treatment. The yield increase is from 9% to 29%
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