Hriska Boteva, Tsvetanka Dintcheva and Boyan Arnaoudov
“Maritsa” Vegetable Crops Research Institute, 4003 Plovdiv, Bulgaria
Boteva, Hr., Dintcheva, Ts. & Arnaoudov, B. (2021). Growing of green beans in open field by application of biofertilizers. Bulg. J. Agric. Sci., 27 (3), 519–523
The aim of the study was to determine the influence of biofertilizers on the vegetative growth and productivity of green beans cultivated by the organic method in the region of Thracian Lowlands.
The field trials were conducted during the period from 2015 to 2017 in the experimental field of Vegetable Crops Research Institute “Maritsa” – Plovdiv, on highly leached meadow cinnamon soil after spinach (autumn sowing). Three Bulgarian varieties of green beans: Tangra, Pagane and Evros were tested with two biofertilizers: Emosan and Biosol, under the scheme of growing 80/30 cm.
The differences in the productivity of the tested green beans varieties produced by the organic method have been identified. With the largest vegetative mass are the plants of Evros variety, fertilized with Emosan (177.21 g), followed by the combined application of Biosol + Emosan (176.84 g), where the largest bean is mass and a number of beans per plant. The impact of fertilization with Biosol on vegetative manifestation is less pronounced for these indicators.
The highest yield was obtained from the Evros variety. Under the influence of bioproducts, yields range from 13550.4 kg/ha (fertilization with Biosol) to 14560. 5 kg/ha (combined fertilization with Biosol and Emosan), the increase is 15.9% and 24.5%, respectively compared to the control. The average effect of the bioproducts, included in the survey for the Evros and Pagane varieties, is very close – 22.8%. No statistically significant differences were found between the two varieties relative to the total yield indicator. The impact of applied bioproducts is the least pronounced in the Tangra variety.
It was established that the variety has a greater impact on the level of yield compared to fertilization with bioproducts.
Evros and Pagane varieties are suitable for organic growing and they are recommended for use in organic farms.