Borun V. Development and justification of the grape nursery drip irrigation regimes under conditions of the south of Ukraine

The work discloses and for the first time establishes the regularities of influence of various LPSM of the grape nursery, schemes of landing of graftings in a nursery on the basic physiological (general flooding, the content of easily holding water, intensity of breath and transpiration), biochemical (the contents of sugars and starch) indicators of tissues of leaves, shoots and roots in grapes, as well as biometric indicators of growth and development of their vegetative mass and root system. As a result, the optimal drip irrigation regimes for grape seedlings have been established. Such regimes include differentiated regimens while maintaining LPSM at 100-90-80% full moisture capacity (FMC) and 100-80% FMC. The graftings are recommended to be planted in the nursery in a ribbon in two rows. It has been experimentally proved that the cultivation of grafted grape seedlings in a nursery with rational graftings schemes, optimal drip irrigation regimes contributing to the better development of the assimilation apparatus of plants (a greater number of leaves, leaf area, foliage was formed) and the growth of their vegetative mass. Plants were characterized by a greater total length of shoots, length of the ripened part, diameter and volume of the total and ripened growth. They developed a larger number of roots, incl. roots of the Ist order. Following the results of this thesis, for the production a highly efficient method of irrigating grape nursery which increases the yield of standard seedlings with nursery to 60%, on 70% or more to save the amount of irrigation water, saving on energy, labor and material resources to use land efficiently under nursery was suggested.