Вплив екстремальних погодних умов вегетаційного періоду на ріст і розвиток горіха чорного (Juglans nigra L.) у зоні Полісся

Abstract

Distinctive features of the morphometric indicators of the vegetative organs of Juglans nigra by years of research were determined. It was established that the seasonal rhythm of the development of research objects is consistent with the natural and climatic conditions of the introduction area. During the years of research, the weather conditions for black walnut vegetation were extreme. On average, over three years of research, May was the wettest month - 61.80 mm. Quantitative parameters of the leaf blade: length, width of a compound leaf, the number of leaves and their area were strongly correlated with the weather conditions of the growing season of the research years, while no positive correlation was found in the structural changes of the growth of the leaf surface and their number relative to the height of the plant during the three years of observations. In 2019, the following factors negatively affected the formation of the black walnut leaf blade (significantly reducing its parameters): a winter with little snow, insignificant precipitation during the growing season, a long rainless period in the summer months, high temperatures and low air humidity during the growing season. However, during the period of research, young and adult plants of black walnut successfully passed the dry growing seasons, among them no dried trees that fell from the plantations were found. The plants showed adaptive properties to the negative impact of the hot and dry growing season of 2019 in the research area. According to the results of the research, a conclusion was made about the success of the introduction of black walnut in the conditions of the Polissia zone of Ukraine.