MORPHOMETRIC INDICATORS OF CONES AND QUALITY OF SEEDS ON EUROPEAN LARCH PLANTATIONS

UDC 630*232.311.3

  • Yakimov Nikolay Ignat’yevich – PhD (Agriculture), Assistant Professor, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: yakimov@belstu.by

  • Kruk Nikolay Konstantinovich – PhD (Biology), Assistant Professor, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: kruk@belstu.by

  • Tupik Pavel Valer’yevich – PhD (Agriculture), Assistant Professor, the Department of Forest Plantations and Soil Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: pavel_tupik@belstu.by

  • Yurenya Andrey Vladimirovich – PhD (Agriculture), 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

DOI: https://doi.org/10.52065/2519-402X-2021-240-6-52-57

Key words: forest-seed plantations, European larch, morphometric indices of cones, quality of seeds.

For citation: Kruk N. K., Yakimov N. I., Tupik P. V., Yurenya A. V. Morphometric indicators of cones and quality of seeds on European larch plantations. Proceedings of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resources, 2021, no. 1 (240), pp. 52–57 (In Russian). DOI: https://doi.org/10.52065/2519-402X-2021-240-6-52-57.

Abstract

Studies were carried out on four forest-seed plantations of European larch in the GLHU “Ivatsevichsky forestry”. Forest-bearing plantations were created with a frequency of several years from 2008 to 2014. They are characterized by good growth and the state of growing trees. The preservation of trees on plantations is 87.2–100%. The height of the trees varies between 2.8–3.3 m, which facilitates the collection of cones.

Biometric indicators of cones (length, diameter, mass) were determined based on measurements of 800 pieces of cones, which were collected 200 pieces from each plantation. After extraction of seeds, their yield from cones, mass of 1000 pcs of seeds, germination energy and germination of seeds were determined.

The results of studies of morphometric indices of larch cones showed that their average length is 3.1 cm, and the average diameter is 2.2 cm. The average weight of one cones is 2.32 g. The yield of seeds from cones was 5.2%.

The germination energy of larch seeds was 14.7%, and germination – 28.3%. The number of empty seeds devoid of embryo and endosperm was 49.7%. The mass of 1000 pieces of larch seeds was 4.4 g. This is due to the presence of a large number of empty unfertilized seeds. Therefore, in order to improve the sowing properties of the seed lot, weeding and flotation methods should be used.

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12.10.2020