Didenko I. The optimization of petiole celery growing technology in the Right-bank Forest-steppe of Ukraine

The dissertation is devoted to the issues of development of petiole celery growing technology in the Right-bank Forest-steppe of Ukraine. The efficiency of innovative technology elements is summarized and new approaches are found in cultivating petioles of celery using high yield varieties, cassette technology of growing seedlings, observance of optimal schemes of plant placement in field, application of absorbent substances, which is very relevant for the propagation of vegetable plants and growing petiole celery. Estimation of celery varieties showed that in the Right-bank Forest-steppe of Ukraine the high yield of commercial products is provided by the Anita variety - 30,1 t/ha, which is additionally up to 5,7 t/ha with high qualitative indicators, the level of profitability of cultivation was 72,8%, and the coefficient of bioenergy efficiency - 4,34. Plants of all varieties, seedlings which were grown using a cassette method with a cell size of 4 х 4 and 6 х 6 cm, had higher elevation parameters, vegetative mass, leaf area, growth and development phases were earlier than cultivating them in control. The highest yield of petiole celery plants in all three varieties was observed with a cassette cultivation method with a cell size of 4 ? 4 and 6 ? 6 cm - 22,8-25,7 t/ha. It is proved that as a result of a decrease in the level of thickening of crops, the number of petioles increased. It has been established that it is more profitable to grow petiole celery in the arrangement of 45 х 10 cm and (20 + 50) х 10 cm, which yields a high level of profitability (78,1-123,5%) and the high value of the bioenergetic efficiency was obtained by the arrangement of 45 х 10 cm and (20 + 50) х 10 cm - 4,37-5,37. It has also been proved that the variants of the experiment, where various forms of hydrogel were used, had better biometric indices of plants compared with control. The use of hydrogel in the cultivation of petiole celery positively affects the quality of the plant, its level of yield, is cost-effective (117,5-137,5%) and economically viable. Thus, the use of gel in the Anita variety made it possible to obtain 43,5 t/ha of high quality commodity products, which is an additional 10,8 t/ha in accordance with the control.