Biochemical Evaluation of Garden-Strawberry Berries When Using Foliar Top-Dressing
This study examined the use of foliar treatment with solutions of macroand microelements when growing garden strawberries of the varieties Elista, Pervoklassnitsa, Zephyr, and Solnechnaya Polyanka in the conditions of the Krasnoyarsk forest. The agrochemical background of the soil when planting garden strawberry bushes in the open ground indicated its high fertility in terms of a set of indicators. At the same time, there was a shortage of micronutrient elements in the soil at the experimental site: Cd (0.2 mg/kg), Cu (0.5 mg/kg), Zn (1.3 mg/kg), Co (0.6 mg/kg) and Cr (0.3 mg/kg). Availability of manganese (65.4 mg/kg) and lead (2.0 mg/kg) was average. The Elista variety was distinguished in the control version of the experiment in the accumulation of copper in the berries (0.9 mg/kg). After foliar treatments with Cu 1% + 8 microelements, the highest Cu content was observed in the berries of the Solnechnaya Polyanka (1.1 mg/kg) and Pervoklassnitsa (1.0 mg/kg) varieties. The Zephyr variety had the lowest copper content in its berries: 0.4 mg/kg. The control variant of the Zephyr variety was distinguished in its iron content (4.6 m/ kg). After foliar treatments with Fe 2% + 8 micronutrient elements, the maximum amount of iron in the berries was recorded in the Solnechnaya Polyanka variety: 4.4 mg/kg. The Elista and Zephyr varieties had a rich biochemical composition without treatment with micronutrient elements. The Pervoklassnitsa and Solnechnaya Polyanka varieties were responsive to foliar feeding with micronutrient elements.
Keywords: Strawberries, non-root top-dressing, biochemical composition of berries
 Bopp, V. L., Kuzmina, E. M. and Mistratova, N. A. (2020). Horticulture of Siberia. Krasnoyarsk: Krasnoyarsk State Agrarian University.
 Prichko, T. G., Germanova, M. G. and Smelik, T. L. (2019). Commercial Qualities and Chemical Composition of Strawberry Berries Selection of FSBSI NCFSCGVWM. Fruit and berry growing in the South of Russia. vol. 58(04), pp. 104-113. Retrieved from http://journalkubansad.ru/pdf/19/04/09.pdf. Date of the application 02.08.2020.
 Mistratova, N. A., Savinich, E. A. and Forsel, A. V. (2017). Assessment of Varieties Fragaria Ananassa Duch. On Biochemical and Commodity Indicators of Berries in the Conditions of the Krasnoyarsk Forest-Steppe. Pomiculture and Small Fruits Culture in Russia, vol. 5, pp. 72-76.
 Pennington, J. and Fisher, R. (2010). Food Component Profiles for Fruit and Vegetable Subgroups. Journal of Food Composition and Analysis, vol. 23, pp. 411-418.
 Yakovenko, V. V. and Lapshin, V. I. (2014). Assessment of Strawberry Varieties by Yield and Quality of Berries. Fruit and berry growing in the South of Russia. vol. 28(04), pp. 1-8. Retrieved from journal.kubansad.ru/pdf/14/04/05.pdf. Date of the application 05.08.2020.
 Prichko, T. G., et al. (2016). Influence of Foliar Dressings on the Quality of Strawberries. Fruit and berry growing in the South of Russia. vol. 58(04), pp. 104-113. Retrieved from httpjournal.kubansad.ru160413. pdf. Date of the application 05.08.2020.
 Vetrova, O. A. and Roeva, T. A. (2019). The Effect of Mineral Fertilizers on the Biochemical Composition and Quality of Fruits. Modern gardening. vol. 3, pp. 48-69. Retrieved from http://journal-vniispk.ru/pdf/ 2019/3/33.pdf. Date of the application 10.08.2020.
 Kondakov, A. K. (2006). Fertilization of Fruit Trees, Berry Fields, Nurseries and Flower Crops. Michurinsk: Michurinsky State Agrarian University.
 Popova, V. P., Fomenko, T. G. and Petrov, I. A. (2013). Efficiency of using Fertilizers and New Generation Growth Regulators to Increase Productivity of Apple Trees. Fruit and berry growing in the South of Russia. vol. 19(1), pp. 75-87. Retrieved from http://journalkubansad.ru/pdf/13/01/09.pdf Date of the application 10.08.2020.
 Rezvyakova, S. V. and Gurin, A. G. (2020). Technology for the Production of High-Quality Apple Seedlings based on Growth Stimulants and Fertilizers. Fruit and berry growing in the South of Russia. vol. 64(4), pp. 78-88. Retrieved from http://journalkubansad.ru/pdf/20/04/07.pdf. Date of the application 10.08.2020.
 Levkova, M. Y., et al. (2005). About the Possibility of using Medicinal Plants for the Treatment and Prevention of Microelementosis and Pathological Conditions. Micronutrients in Medicine, vol. 6, pp. 3-10.
 Voloshin, E. I. (2015). Fertilizer Application Guide for Berry Crops. Krasnoyarsk: Krasnoyarsk State Agrarian University.
 State Standart R 53135-2008 Planting Material of Fruit, Berry, Subtropical, Nut-Bearing, Citrus Crops and Tea. Retrieved from: http://docs.cntd.ru/document/1200069387. Date of the application 10.08.2020.
 Dospekhov, V. A. (1985) Methods of Field Experience. Moscow: Agropromizdat.