| Summary: | The catalpa tree is a member of the family Bignoniaceae, a species of catalpa. Representatives of this family consist of trees, shrubs, lianas and grasses, and are distinguished from other members of the family by their ornamental flowers and unusual leaves. There are regions with different climatic conditions, and in the soil and climatic conditions of the experimental cities of Tashkent and Nukus in Uzbekistan, it is important to select the composition of tree species resistant to various environmental factors. In the soil and climatic conditions of different regions of Uzbekistan, along with ornamental native plants, the widespread use of tree species introduced to our country will certainly bear fruit. The results of the study show that the use of Catalpa species in landscaping should take into account their bioecological properties. In Tashkent, the Catalpa speciosa Walder ex Engelm can be widely recommended for semi-shaded areas and in the soil-climatic conditions of Nukus for seedling breeding of Catalpa bignonioides Walt.
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