Influence of climatic conditions on the propagation of walnut

The results of the influence of climatic conditions on the propagation of zoned and promising cultivars of walnut in the Nikita Botanical Gardens in the steppe zone of the Crimea have been given. Eighty-seven samples were collected from Juglans regia L. plantations. During the experiment, various methods of summer budding of two-year-old walnut seedlings were used: a half-tube with a bud, a wide scutellum with a bud and a cutting with two buds. As a result of statistical processing of the obtained data, it was determined that the period from the beginning of the third decade of June to the middle of August is the most favorable for the propagation of walnut in the open ground. The highest degree of survival of budding (more than 71.0%), by the first two methods, was marked for five propagated cultivars of walnut: ‘Konkursny’, ‘Pamyaty Pasenkova’, ‘Pozdnotsvetushchy’, ‘Malosadovy’ and ‘Scaberi’. The survival of the buds of ‘Arkad’, ‘Alminsky’ and ‘Generalsky’ did not exceed the threshold of 50%. The most significant fluctuations in the degree of survival of the buds were typical for ‘Arkad’ (17.0-69.2%) and ‘Generalsky’ (33.2-82.0%). In all cultivars, a very low degree of grafting survival of the scion (not more than 2.5%) was recorded while grafting with pruner.