| Autor: |
I.V. Grynyk, A.Ya. Karas, V.A. Sobol |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Horticulture: Interdepartment Subject Scientific Collection. :52-65 |
| ISSN: |
0558-1125 |
| DOI: |
10.35205/0558-1125-2021-76-52-65 |
| Popis: |
The authors present the results of studying different types of the plum orchards. The trees grafted on the clonal rootstocks VVA-1 and Evryca appeared to take roots best in spring after planting. The trees on those rootstocks began active growth two weeks earlier than on seed rootstock (myrobalan plum) and formed a greater amount of the side shoots. In the second-fifth years after planting the trees on the medium-growing rootstock Evryca grew more actively, on VVA-1 more slowly. The most intensive was the formation of the flattened crowns of the trees grafted on Evryca when in the three-year age the time expenditures were by twice higher than on the other rootstocks. The cultivar Stanley on the clonal rootstocks was the most early-ripening one. Its orchards began marketable fruit-bearing in the three years age. The trees of more vigorous cvs up to the five-year age were lower by a quarter on VVA-1 and of the low variety Oda higher on the seed rootstock and on Evryca and VVA-1 lower by 15 and 33 % respectively. It appeared that it is necessary to limit crowns from the side of the inner-row space for the trees on Evryca beginning from the five-year age. The trees of all the strains had the largest summary shoot length on the myrobalan plum: Oda by 1.5, Stanley by 1.4-2.9, Bogatyrska by 3.3-3.4 times than on VVA-1 and by 1.2; 1.9 and 3.8 times respectively than on Evryca. The trunk diameter of the trees on VVA-1 was by 33-62 % shorter than on the other rootstocks. In the first years of the marketable fruit-bearing the trees of ‘Stanley’ and ‘Oda’ with the orbicular crown on the seed rootstock were more productive (38.4 and 35.9 kg/tree) while on Evryca this index was by 22 % lower. The trees on VVA-1 provided the yield on a level of 31-48 % of that on the myrobalan plum. Since the orchards on different rootstocks were established with the different planting density the highest yield on the whole was achieved in the orchards of cvs Stanley and Oda on Evryca with the orbicular crown (4 x 2.5 m) on the average 297.5 and 278.8 c/ha respectively, that is by 1.4 times more than on the seed rootstock and VVA-1 with the formation of the spindle-like crown (by 1.2-1.3 times higher). The planted crowns on the trees on VVA-1 proved non-effective. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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