Sievidov I. Improvement of technology elements for growing indeterminate tomatoes in spring film greenhouses.

The dissertation presents a theoretical justification and a practical solution to the scientific problem of increasing the productivity of tomato hybrids of indeterminate type, by establishing the characteristics of growth and development of plants, and optimizing the elements of cultivation technology (plant density, feeding), depending on the range and conditions of the growing season in spring film greenhouses. A summary of the achievements and analysis of scientific research of domestic and foreign authors on the characteristics of the growth and development of tomato plants is carried out. The relevance of the introduction into production of new, more productive indeterminate tomato hybrids for growing in spring film greenhouses has been determined. For the first time, the peculiarities of crop formation of indeterminate F1 tomato hybrids in spring film greenhouses have been experimentally investigated and substantiated. The biological features of plants of indeterminate F1 tomato hybrids in spring film greenhouses without heating have been studied, their total adaptive productivity has been determined, and the duration of stages of organogenesis has been specified. The potential of indeterminate hybrids, parameters of their adaptability to the conditions of spring film greenhouses without heating are determined. The optimal plant density and the most effective preparation for root fertilization of tomato plants have been established, which provides an increase in yield. The economic and bioenergetic efficiency of the proposed methods and elements of tomato growing technology in spring film greenhouses without heating is calculated