Effect of humic fertilizer on the growth and development of Ulmus pumila L. hybrids

In arid regions, forest strips are one of the most important natural resources. The use of modern preparations that improve the growth and development of plants will allow the most complete and effective cultivation of planting material and meet the need for various types of forest products. Squat elm (Ulmus pumila L.) has increased resistance to drought, decorative and protective properties. During the experiment, the authors tested a humic fertilizer-a growth biostimulator “Biofulen torfogel”, which contains nitrogen, phosphorus, potassium, humic and fulvic acids, which provide the plant with all the necessary nutrients during active growth. It was revealed that Biofulen torfogel has a positive effect on seedlings of squat elm, increasing their biometric parameters several times in comparison with the control. Weather conditions in 2020 and 2022 were milder, as a result of which the weight of the root and foliage of the studied plants under the wagging of the drug turned out to be higher than in 2021. It is established that the regulation of the time of soaking seeds in the preparation “Biofulen” allows you to get elm seedlings of various sizes. Additional treatment of leaves with a biostimulator of growth allows increasing the phytomass, which, in turn, accelerates the processes of photosynthesis, increases the content of chlorophylls and the size of the crown of the tree. Irrigation norms established according to the phases of plant growth and development complement the effect of humic fertilizer and make it possible to provide work on agroforestry development of arid region with seed and planting material of the necessary assortment of long-lasting fast-growing, drought- and salt-resistant tree species and forms. Accelerated cultivation of planting material, in turn, will ensure stabilization and improvement of the ecological situation in the Volgograd region, which is experiencing the disastrous effects of dry winds, droughts, dust storms and water erosion. Stimulating plant growth will allow you to select and propagate the valuable gene pool of the main forest-forming species of the arid zone.

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