| Abstrakt: |
An introductory study of Maclura tricuspidata (Carriere) Bureau in the Khorol Botanical Garden is shown. It is singled out as an important stage of the creation of a collection plantation, which is used to establish the degree of stability of the species in new conditions of growth and the prospects of its distribution and cultivation both in the research region - in the Poltava Region, and in the natural and climatic zone - the Forest Steppe of Ukraine. It is noted that in the process of developing plants, seeds soaked for one day were sown in a nursery with a substrate of one part of the soil and two parts of river sand, where the soil fertility was about 40%, and the growth during the growing season was 15-20 cm. After growing, the seedlings were grafted by the method of improved copulation and split into the varieties 'Che Seedless', 'Norris' and pollinator. Grafting was done in the root neck, which allowed the seedling to be transplanted to a permanent place of growth in a botanical garden with a depth of 15 cm at the site of grafting into the soil in order to preserve varietal characteristics in case of loss of the aerial part of the plant due to damage by frost with critical sub-zero temperatures for the species. The expediency of protecting the root system from the effects of low temperatures in the cold season, when the lower part of young plants and the circle around the stem are covered with a thick layer of fallen leaves, and with this agrotechnical method, the soil around the root system does not freeze to depth, which has a positive effect on the state of wintering - plants do not freeze. For visual identification by external features of the M. tricuspidata samples available in the collection, photofixation of the leaves, linear measurements of the leaf blade and spines as lateral elements of the shoot, and description of the shape of the leaf blade were made. In this way, a collection plantation of M. tricuspidata was established using the varieties of foreign selection 'Che Seedless', 'Norris', their pollinator and seedling form. Further enrichment of the collection with a variety of introductory material will contribute to the successful implementation of selection research tasks on the selection of local resistant forms. [ABSTRACT FROM AUTHOR] |
