Melon crops occupy an important place in the diet of the population and contain a large amount of vitamins, minerals and organic acids. Melon ( Cucumis melo L.) has very useful properties and provides the body with substances and elements necessary for human health. In this respect, the use of micro-fertilizers in polyculture, and in particular in the cultivation of melons, is one of the most pressing issues. This is because microelements are involved in many physiological and biochemical processes in the body—from the processes of anabolism and catabolism inside the cell to the reproduction of the organism. As a result of the positive effect of microelements, the amount of chlorophyll in leaves increases, photosynthesis increases, and the assimilative activity of the whole plant increases. The lack of microelements causes defects in the growth and development of crops; their development is delayed, the resistance to adverse conditions is reduced, and they are often damaged by diseases and pests. The article describes the effect of the use of zinc, copper, manganese, and cobalt microelements in the cultivation of melon crops on the formation of male and female flowers and the nitrogen content in the leaves. The effect of microelements increased the nitrogen content in the leaves and the number of flowers. The melon varieties Amiri and Kizil Gulobi were used for the study.
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