Organomineral fertilizers application efficiency on onion crops

The purpose of the study is to establish the effect of organomineral fertilizers on the productivity of onion crops. Objectives: to establish the effect of the composition and dose of organomineral fertilizers on onion crops, to determine the effectiveness of root and foliar treatments. With the non-waste method of processing lowland peat, three types of organomineral fertilizers are obtained, their common name is the agrochemical Tyumensky: peat-humic mixture (grade A), sulfate-fulvic solution with the addition of mineral fertilizers (grade B), humic preparation (grade C). Root feeding of winter garlic plants with a solution of brand B provided an increase in the yield of three varieties in the range of 14-33 % due to an increase in the diameter and weight of the bulb. The maximum germination of onion sets (100 %) was observed when soaking the set in brand B solution (2 ml/l) and irrigating with grade A at a dose of 2 l/ha. The greatest increase in plant height was noted with the root application of grade A at a dose of 2 l/m2 - 6.7 cm (31 %). The maximum increase in the diameter and weight of the bulb in relation to the control was obtained in the variant with pre-sowing seed treatment with a solution of brand B and root application of brand A at a dose of 2 l/m2 - 2.6 cm and 76.9 g, respectively. The yield increased by 1.25 and 1.45 kg/m2 with the use of the agrochemical Tyumensky in the form of root treatment in doses of a working solution of 2 and 5 l/m2. Pre-sowing soaking of sets in brand B solution also significantly increased the yield - by 0.79 kg/m2. The maximum increase in the content of dry matter and sugars and the minimum content of nitrates in the bulbs were noted in the variant when the seeds were soaked in a solution of brand B and watered with a solution of brand A at a dose of 2 l/m2.