Abstract
This article presents the results of two years of research (2017-2018) on the effects of the growth regulator Hemo bles (humic acid - 85%) on the growth, development and productivity of tomato plants in greenhouses. The object of study is the tomato Big Beef F1. Middle-ripening, indeterminate type. Tomatoes were grown according to generally accepted technology in greenhouse conditions. When studying the effect of humic acid on tomato plants, the treatment was carried out in concentrations (250 mg/l, 500 mg/l, 700 mg/l), 3 times, with an interval of 30 days. This experiment was aimed at studying the effect of spraying with humic acid (Hemo bles) on the vegetative growth, flowering and fruiting of a tomato. Spraying of plants was carried out after 30, 60 and 90 days. Data collection: Ten plants from each repetition (out of 3) were selected to measure the following parameters: plant height (cm), number of leaves per plant, leaf area index LAI (m2/plant), chlorophyll content (chromometer) and fruit weight (g). Biochemical properties were evaluated at the stage of fruit ripening; dry matter was calculated by weighing the fruits before drying and after drying at 105° C; ascorbic acid (AA) was determined by 2,6-dichlorophenolindophenol. As a result of studies, it was found that the use of humic acid increases the productivity of tomato plants.
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