Acorn production of pedunculate oak in northeast of Ukraine
Author:
Rumiantsev Maksym1, Kobets Oleksii1, Vysotska Natalia1, Luk’yanets Volodymyr1, Obolonyk Iryna1, Tupchii Olha2, Bondar Oleksandr3, Nazarenko Vitalii2
Affiliation:
1. 1 Ukrainian Research Institute of Forestry and Forest Melioration named after G.M. Vysotsky , 86 Pushkinska Street , Kharkiv , Ukraine 2. 2 State Biotechnological University , 44 Alchevskyh Street , Kharkiv , Ukraine 3. 3 Taras Shevchenko Regional Humanitarian-Pedagogical Academy of Kremenets , 1 Litseina Street , Kremenets , Ukraine
Abstract
Abstract
We analysed the quantity and quality of Quercus robur L. acorns after years with a very poor yield under the canopy of natural oak stands of various compositions, ages and stock densities in the northeastern part of Ukraine. We determined the mass of 1,000 healthy and damaged acorns of the current year. The levels of variability were estimated for the number and mass of acorns under the canopy of the studied stands. The dependences of the number of acorns on the age of oak stands and their stock density were studied. The total number of acorns under the canopy of natural oak stands was 9,900–19,000 seeds per hectare with a total mass of 26.8–54.1 kg per hectare in 2020 and 8,600–17,200 seeds per hectare with a total mass of 22.7–48.4 kg per hectare in 2021. The proportion of damaged acorns was about 70% both in 2020 and 2021. The largest number of acorns was concentrated under healthy trees (without signs of decline) that had a well-developed crown and, therefore, received more sunlight and heat. The identified quantitative and qualitative estimates and acorn spreading pattern need to be considered when selecting sites for further natural seed regeneration in old-aged oak stands.
Publisher
Walter de Gruyter GmbH
Reference48 articles.
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