Growth and Productivity of Non-Indigenous Woody Species in the Middle Urals
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2021, Vol 9, Issue 6
Abstract
Climate warming has been recorded over the last decades. The air temperature in Yekaterinburg has been rising since the 1930s. Temperatures dropped sharply in 1940–1949, then rose sharply and fell again, especially in 1967–1968, when many large introduced species considered to be adapted died: Phellodendron amurense Rupr. and Pseudotsuga taxifolia (Lindl.) Britt. Due to the cyclical nature of weather conditions, it was necessary to assess the features of adaptation and state of the introduced plants in recent years. Snowless autumn and winter, temperatures above zero in early spring are unfavourable for many species, especially or conifers. Thus, in 2014 much snow fell on October 16 and melted in 2 weeks, temperatures below zero did not afford plants to prepare for the winter; in March 2015 the temperature rose up to +10 °C while the ground temperature was below zero for a long time. As a result of physiological dryness 100 % of specimens of variegated forms of northern white cedar Thuja occidentalis L. `Ellwangeriana Aurea`, `Ericoides` died. In other forms the leafage died to the snow cover level and recovered after abundant rains: `Aurea spicata`, `Gold Pearl`, `Golden Globe`, `Lutescens`, `Semperaurea` and `Wareana Lutescens`. Due to a steady increase in the sum of positive temperatures and reaching a certain age, many conifer species entered the fruiting stage and gave self-seeding: Pinus peuce Grieseb, Pinus strobus L., Picea canadensis (Mill.) Britt. et al., Picea pungens Engelm., Pseudotsuga taxifolia (Lindl.) Britt., and Abies sachalinensis (F. Schmidt) Mast. In the warmest year of 2016, the latter gave an abundant yield – red-brown cones with protruding seed scales; a strong wind dropped them all. They remained under the snow for the winter and did not crumble (probably, the fruits were unripe), so Abies sachalinensis was mistaken for Keteleeria fortunei (A. Murray bis) Carrière), which has cones that do not crumble. Unusual flowering was observed in Crataegus oxyacantha L. `Rosea Plena`, Mespilus germanica L., Syringa reflexa C.K.Schneid, Hamamelis virginiana L. With the rise in average annual temperatures, the number of years with abnormal weather conditions increased and the condition of some plants deteriorated. For citation: Semkina L.A., Tishkina E.A. Growth and Productivity of Non-Indigenous Woody Species in the Middle Urals. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 100–109. DOI: 10.37482/0536-1036-2021-6-100-109
Authors and Affiliations
L. A. Semkina, E. A. Tishkina
Growth and State of Mixed Stands of Forest Plantations of the Kamennaya Steppe
By now, a vast amount of experimental material has been accumulated in the field of protective afforestation of the Central Chernozem Region of Russia, which allows estimating the stability and longevity of various trees...
Formation of Coaxial Fields of Residual Stresses in the Circular Saw Blade
The working tool of machines with circular cutting units is a circular saw, the condition of which largely determines the quality of material processing. Circular saw blades in the process of operation are subjected to a...
Navigation and Piloting System of Unmanned Aerial Vehicle for Forest Fire Monitoring
Forest fires are a common natural disaster all over the world. A great number of fires occur annually in the forest ecosystems of the European North of Russia for natural reasons and as a result of anthropogenic impacts....
Changes in the Morphological Characteristics of Secondary Fiber Obtained from Wet-Strength Paper During Gentle Refining of the Recycled Pulp. Part 2. Fines Characteristics
The process of recycled pulp refining is usually associated with a significant change in the morphological characteristics of the secondary fiber and the formation of additional amounts of fines. It is well known that fi...
Seasonal Growth of Scots Pine under the Conditions of Water-Logged Soils of the North
The seasonal rhythm of height growth of young shoots of Scots pine growing in a 33-year-old shrubby-sphagnum pine forest of the northern taiga natural-climatic zone has been studied in a complex with the main physiologic...