UDC 630*232.329.6

Nosnikov Vadim Valer’evich – PhD (Agriculture), Associate Professor, Assistant Professor, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: nosnikov@belstu.by

Granik Aleksandr Mikhaylovich – Master of Agriculture, assistant lecturer, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: granik@belstu.by

Yurenya Andrey Vladimirovich – PhD (Agriculture), Associate Professor, Assistant Professor, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: urenya@belstu.by Selishcheva

Oksana Aleksandrovna – PhD (Agriculture), Senior Lecturer, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: oksana_selishchava@mail.ru

DOI: https://doi.org/ 10.52065/2519-402X-2023-270-2-4

Key words: peat substrate, substrate moisture, active acidity, density, conversion factor

For citation: Nosnikov V. V., Granik A. M., Yurenya А. V., Selishcheva O. A. Сhanges in the quality parameters of peat substrates depending on the technological methods and conditions of complexes for growing containerized seedlings. Proceedings of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resource, 2023, no. 2 (270), pp. 28–35. DOI: 10.52065/2519- 402X-2023-270-2-4 (In Russian).

Abstract

The article presents the results of studies of the effect of irrigation water on the acidity and salt content in the substrates used for growing planting material of tree species with a closed root system. The acidity of irrigation water at forestry enterprises has a neutral or slightly alkaline reaction of the environment (6.77–8.19 pH). When irrigating, the pH of the substrate increases, significantly deviating from the optimal values (for 6 months under laboratory conditions, the pH of the substrate increased by 1.7–1.8 units). Methods for regulating this phenomenon are acidification of irrigation water or acidification of the substrate itself in the process of growing planting material. The introduction of nitric or sulfuric acid can effectively reduce the acidity of water to the required level of 5.5 pH. However, it should be borne in mind that in this case there is a significant increase in the content of salts. The use of granulated sulfur as an acidity regulator is more appropriate. Its action is slower compared to acids. It also provides information on recalculating the amount of substrate from a big-bale with peat into a cassette cell. Due to the differences in the technological processes of stuffing cassettes, the conversion factor varies from 1.08 to 1.95. Based on the provision of the skeletal functions of the substrate and the required level of aeration of the root systems, it can be taken as optimal 1.3–1.4.

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15.03.2023