Productivity of winter garlic with different norms of fertilizers

Relevance. Garlic is one of the most valuable food products and the increase in its production is associated with the growing needs of the population, the processing industry and medicine. Garlic is very responsive to the use of fertilizers, which are an integral part of the cultivation of individual crops and are aimed at obtaining high and stable yields with good quality products.Methods. The purpose of the research is to study the productivity of winter garlic, depending on the application of various norms of fertilizers. The studies were conducted in the arid zone of the Stavropol Territory. The objects of research were varieties of winter garlic Lyubasha, Leader, Jubileyny Gribovsky, the rate of mineral fertilizers. Potassium nitrate, monopotassium phosphate, ammonium nitrate, ammophos were used as mineral fertilizers.Results. As a result, it was established that with the use of fertilizers, the quantitative and qualitative indicators of the formation of the yield of garlic increased. The largest vegetative mass of garlic was formed when using the N120P95K50 in the food system; the highest values for plant height and leaf area were obtained, the difference with respect to control, was between 5-18 cm and 9-45 cm2 , respectively. The largest mass of the bulbs was obtained when making garlic N120P95K50 – 51-85 g, which exceeded the control by 15-18 g. Garlic plants grown with the use of N80P95K50 were the least affected with diseases - the degree of development of the diseases was less than with control, by 0.2-1.5%. The use of fertilizers in the cultivation of garlic contributed to an increase in crop yield: the highest indicators were obtained when applying N120P95K50 – 19.4-21.3 t/ha, which was more control, by 0.4-3.2 t/ha. Most of the nutrients in the bulbs accumulated when using N80P95K50: the dry matter content exceeded the control, N80P95K75 and N120P95K50 by 3-10%, sugars – by 0.3-1.4%, essential oils – by 0.02-0.1 mg/100 g, vitamin C – 2-8 mg per 100 g wet weight. The amount of nitrates in garlic bulbs was lower than the MPC by 3-33 mg/kg