Agriculture and forestry

Hotvianska Anna Sergiivna – postgraduate student of the Institute of vegetable growing and melon-growing of the National Academy of Sciences of Ukraine, researcher of the Dnepropetrovsk Experimental Station of IVG of the National Academy of Sciences of Ukraine (52041, villige Alexandrovka, Beloretskaya St., 17 e-mail: danilina_anny@ukr.net.).

The article presents the results of studies on the effect of fertilizer and density seeding on the background of a differentiated irrigation on productivity and yield uterine bulbs of onion variety Lyubchik. The introduction of fertilizers promotes an increase in the yield of uterine bulbs by 3.0–4.2 t / ha. An increase in the density of onion planting to 1000–1,200 thousand pieces / ha provides an increase in the yield of uterine bulbs by 18.1–36.1% compared to the control. The fractional composition of the mother bulbs is determined depending on the elements of the technology under investigation. With an increase in the density of plants, the number of mother bulbs increases substantially due to an increase in the collection of the fraction of 30–39 mm. It has been established that the maximum productivity of the mother bulbs (35.1 t / ha) and their yield (517 thousand pieces / ha) is formed when the P45K30 is locally applied + 2 top-dressing N15 (fertigation) + 2 foliar top-dressings Reakom 3 l / ha and seeding density 1200 thousand pieces / ha on the background of drip irrigation with a differentiated moisture regime.

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