Qualifying scientific work is dedicated to the topical issues of technology improving of Spinach cultivation in the Right-bank Forest-Steppe of Ukraine, which summarizes the effectiveness of innovative technology elements and finds new approaches to vegetable garden spinach growing using new varieties and hybrids; observance of optimal plant placement schemes, application of plant growth regulators, which is quite relevant for the distribution; the establishment of the adaptability of varieties and hybrids and the improvement of the technology of vegetable spinach cultivation.
The estimation of the vegetable spinach varieties proved that in the Right-bank Forest-Steppe of Ukraine the high yield of marketable products is ensured by the Malachite variety – 22.5 t/ha, which is an additional 2.8 t/ha of high-quality crop for increasing plant weight to 60.3 g. In other varieties and hybrids was 0.6–2.3 t/ha, the profitability level reached 53.1 %; the bioenergy efficiency ratio was 3.4.
The Lewis stability coefficient indicates that the spinach varieties of the Polissya Krasen’ and Malachite are more stable in terms of yield, despite growing conditions in the years of research (Kstn = 1.56–1.65), whereas the Sporter and Spiros hybrids had a higher value (Kstn = 1.66–1.73).
It has been proved that with the increase of plants density per planted area, the yield of spinach was increased. The highest yield was obtained for the wide-row sowing method and the schemes 45×10 sm – 25.7 t/ha, for the ribbon method and the arrangement scheme (20 + 50)×10 sm – 26.7 t/ha.
The pre sowing vegetable spinach seeds treatment with growth regulators Emistim C, Gumysol, Lignogumat contributed to its rapid germination, increased plant growth and development, and resulted in a yield increase of commodity products for 2.0–6.1 t/ha and an increase in chemical composition.
The mathematical relation (determination coefficient 0,64–0,74) indicates the existence of a linear dense relationship between the spinach yield and the weight of the plant, as indicated by the correlation coefficient (0.823–0.994) and the yield is increased, respectively, by the coefficient of regression.
The production of commercial products of spinach varieties is rather cost-effective and provides high economic efficiency and high bioenergy estimation. The best indicators of economic efficiency were characterized by the Malachite variety, for which the conditionally net profit is UAH 45,98 thousand, profitability level – 105%, KbE – 3,5. The high value of the net profit for the application of the scheme of placement 45 × 10 sm and (20 + 50)×10 sm is UAH 55346 thousand, profitability level – 75–83 %, KbE 3,2–3,4. The pre-sowing vegetable spinach seeds treatment with plants growth regulators Emistim C, Gumysol and Lignogumat showed that the high conditionally net profit makes UAH 47,4–57,48 thousand, profitability level – 83–102 %, KbE – 3,4.
