Особливості репродуктивної здатності видів роду Juglans L. у колекційних насадженнях національного ботанічного саду імені М. М. Гришка НАН України
| Rok vydání: | 2020 |
|---|---|
| Předmět: |
Sowing
Biology medicine.disease_cause Horticulture періодичність плодоношення урожайність фертильність пилкових зерен життєздатність пилку схожість насіння Productivity (ecology) Germination Genus Pollen medicine lcsh:SD1-669.5 General Earth and Planetary Sciences Reproductive capacity lcsh:Forestry General Environmental Science |
| Zdroj: | Науковий вісник НЛТУ України, Vol 30, Iss 4, Pp 41-45 (2020) |
| ISSN: | 2519-2477 1994-7836 |
| DOI: | 10.36930/40300407 |
| Popis: | The determination of reproductive capacity of species of the genus Juglans L. was performed in the period of 2016-2017. Research methods that were applied were as folllows: biological and statistical (visual observations and analysis of the results); laboratory (pollen fertility studies). In the course of research we have found that the percentage of fertile pollen ranged from 92.3 % (J. regia L. f. fertilis Petz et Kirch.) to 70.4 % (J. mandshurica Maxim.). The percentage of sterile pollen is revealed to be the lowest in plants of J. regia L. f. fertilis Petz et Kirch. – 7.6 %, higher in plants J. ailantifolia Carriere (35.1 %). The indicators of real seed productivity of species of the genus Juglans L. were the highest in J. regia L. f. fertilis Petz et Kirch. (10.7), and the lowest in J. microcarpa Berland. (0.5). The average value of potential reproductive capacity was the highest in J. regia L. f. fertilis Petz et Kirch. – (23.3), and the lowest in J. microcarpa Berland. (1.6). The productivity coefficient of the experimental species was the highest in J. mandshurica Maxim. (80.1) and the lowest in J. major (Torr.) A. Heller (33.3). The research has also identified that the highest yield (6 points) in experimental plants of J. nigra L. was recorded in 2018, and the lowest (2 points) in plants of J. microcarpa Berland. in 2017. Non-viable seeds of experimental species in terms of introduction are the most abundant in J. regia L. f. fertilis Petz et Kirch. (3-2.7 %), and the least in J. mandshurica Maxim. (0.6-0.7 %). The stratification of seeds of species of the genus Juglans L. in terms of introduction ranges from 120 (60) (J. regia L. f. fertilis Petz et Kirch.) to 145 days (J. nigra L., J. cinerea L.). The best seed germination for most of the experimental species of Juglans L. was observed during autumn sowing in the soil with fertilizers, which amounted to 92 % (J. regia). Seed germination rates of J. regia f. fertillis was 10 %. A study of the reproductive capacity of plants of the genus Juglans L. showed that the results differ between plants of different species, but species of the genus Juglans L. form a high percentage of fertile pollen, i.e. from 92.3 % (J. regia L. f. fertilis Petz et Kirch.) to 70.4 % J. mandshurica Maxim.), fruiting annually, form a complete similar seed, which indicates adaptation to the conditions of introduction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|