Specific features of the growth of Scots pine vegetative organs in the forest-steppe zone of Cisbaikalia

2007 ◽  
Vol 38 (6) ◽  
pp. 381-387
Author(s):  
V. F. Zabuga ◽  
G. A. Zabuga
Keyword(s):  
Scots Pine ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Vegetative Organs

scholarly journals Successions of microbiotic communities of sandy soils in pine stands of different ages in the forest-steppe zone

2021 ◽  
Vol 6 (48) ◽  
pp. 15-15
Author(s):  
Nikolay Nevedrov ◽  
Ekaterina Kuznetsova ◽  
Elena Baidak ◽  
Galina Popova
Keyword(s):  
Scots Pine ◽  
Sandy Soils ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Microbiological Activity ◽  
Hydrothermal Conditions ◽  
Innovative Methods ◽  
Turf Soils ◽  
Response Increase ◽  
Transformation Processes

Peculiarities of transformation processes in soils should be taken into account when developing strategies for their rational use and optimization of their functions. The purpose of the work is to study the successions of soil microbiotic coenosis of azonal Al-Fe-humus sandy soils in pine forest stands of different age in the cities of the Kursk region. Traditional and innovative methods of studying the microbiological activity of soils are used in the work. Al-Fe-humus sandy soils of the forest-steppe covered with 100-year-old stands of Scots pine emit 2.1-2.3 times more CO2 than Al-Fe-humus sandy soils under 25 - and 70-year-old stands of pine and 1.5 times more than similar soils under herbaceous phytocenoses. It has been established that stands of Scots pine during 100 years of vegetation lead to significant changes in the basic properties of soils, changes in response, increase in podzolic process, changes in hydrothermal conditions, as well as increase in the biomass of the main groups of soil microorganisms (up to 38.1 times). Keywords: MICROMYCETES, ACTINOMYCETES, SANDY PODZOLS, GRAY HUMUS (TURF) SOILS, CO2 EMISSION, MICROBIOLOGICAL ACTIVITY OF SOILS

scholarly journals Hylobius species (Coleoptera: Curculionidae) from Siberia and the distribution patterns of adults feeding in Scots pine stands

2000 ◽  
Vol 11 (1) ◽  
pp. 57-66
Author(s):  
Andrei Gourov
Keyword(s):  
Scots Pine ◽  
Distribution Patterns ◽  
Steppe Zone ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Mature Trees ◽  
Additional Food ◽  
Pine Stands ◽  
Scots Pine Stands

Seven Hylobius species are known from Siberia, while the occurrence of three of them is doubtful. Information available about the supplementary feeding of adult weevils is reviewed. It is likely that H. abietis and H. albosparsus are the only species of economic significance in this territory. In the northern forest-steppe zone, adult weevils usually prefer to feed separately on isolated or border young trees under the canopy of light Scots pine stands, but avoid the undercanopy regeneration in the dense stands. In the southern taiga zone, adults are abundant on cutover areas where they feed in clumps of young regeneration. In fresh clearcuts, up to 100% of juvenile trees may be damaged by the feeding of weevils, whereas the damage intensity declines sharply with the distance to the clearcut. An edge effect in the distribution of adult weevils needs verification and, probably, is time-dependent. Inside the stands, the crowns of mature trees may constitute an additional food niche for adults if the usual sources and preferred environmental conditions are not available.

scholarly journals THE ELEMENTAL COMPOSITION OF THE VEGETATIVE ORGANS OF SORTS REGAL AIR AND SPEAK TO ME OF HEMEROCALLIS HYBRIDA

2020 ◽  
pp. 245-250
Author(s):  
Lyudmila Leonidovna Sedel'nikova ◽  
Ol'ga Vasil'yevna Chankina
Keyword(s):  
Trace Elements ◽  
Elemental Composition ◽  
Mineral Composition ◽  
Western Siberia ◽  
Chemical Elements ◽  
Total Content ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Vegetative Organs ◽  
Ecological Conditions

The data on the content of 22 chemical elements in the leaves and rhizomes of Hemerocallis hybrida plants of the Speak to me and Regal Air varieties growing in soil-ecological conditions of the forest-steppe zone of Western Siberia are presented. The General regularities of accumulation and distribution of macro- and microelements in leaves and rhizomes of plants of two varieties of daylilies are established: excess of the content of many microelements (vanadium, chromium, nickel, rubidium) in rhizomes in comparison with leaves. It was revealed that the concentration of chemical elements in plants differed both in organs and between varieties. The peculiarity of the mineral composition of the Regal Air variety was the excess of the total content of trace elements in 1.5–3 times compared to the variety Speak to me. Concentrations of individual elements in the leaves and rhizomes of daylilies differed significantly. It is shown that in both varieties in the leaves the amount of bromine was 4 times higher than in rhizomes, strontium – 1.5–1.8 times. The concentration of toxicant elements in the phytomass of Hemerocallis hybrida varieties was significantly lower than permissible concentration, which makes it possible to use them for medicinal purposes.

Biological features of Iris setosa in the forest-steppe zone of Western Siberia

2020 ◽  
Vol 19 (1) ◽  
pp. 55-59
Author(s):  
L. L. Sedelnikova
Keyword(s):  
Growth Cone ◽  
Western Siberia ◽  
Steppe Zone ◽  
Early Spring ◽  
Seasonal Development ◽  
Forest Steppe ◽  
Adaptive Potential ◽  
Vegetative Organs ◽  
Second Stage ◽  
Generative Organs

The seasonal rhythm of development of Iris setosa during the growing season of 2016–2018 in the conditions of the forest-steppe zone of Western Siberia is analyzed. It was determined that in the pre-winter the cone of growthof the renewal shoot forms vegetative organs-leaves, which corresponds to the second stage of organogenesis. Differentiation of the growth cone of the shoot to generative organs begins in early spring in May during a period of intensivegrowth. Within 14–15 days, the growth cone undergoes intrarenal development from stages III to VIII of organogenesis.IX–XII stages of organogenesis correspond to phenodates from flowering to fruiting. The duration of flowering is 10–25days. Plants undergo a full cycle of seasonal development from regrowth to fruiting, have high cold resistance, resistanceto diseases and pests. In the forest-steppe zone of Western Siberia, the adaptive potential of I. setosa is 23–30 points. Itwas found that according to the adaptation criteria, highly promising plants of I. setosa from the Trans-Baikal population.

scholarly journals Dynamic bioproductivity of Scots pine stands within Northern Steppe of Ukraine conditions

Agrology ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 108-113
Author(s):  
V. M. Lovynska ◽  
S. A. Sytnyk ◽  
V. I. Chorna ◽  
K. P. Maslikova
Keyword(s):  
Scots Pine ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Dynamic Changes ◽  
Aboveground Phytomass ◽  
Study Region ◽  
Theoretical Substantiation ◽  
Current State ◽  
Pine Stands

Dynamic changes in forest ecosystems, which can be both short-term and long-term, are assessed on the scale of long-term biologically determined stages, through the determi-nation of age parameters. In this context, the results on the dynamic changes of the components of the aboveground phytomass of Scots pine in the northern steppe zone of Ukraine are presented. Based on the simulated growth tables of the studied modal artificial pine stands, standards for the dynamics of their bioproductivity have been developed for such components of aboveground phytomass as trunk in bark, branches in bark and needles. Modeling and statistical evaluation to determine the phytomass of the aboveground part of the pine stand: wood and bark of the trunk, branches and needles of the crown in a completely dry state. Tables of theoretical distribution of indicators of components of phytomass of pines for an age category from 10 to 80 years are con-structed. Regularities of phytomass changes of trunk components in bark and crown for stands of I–IV classes of quality were found. It is established that the dynamics of changes in the components of both the stem part and the components of the crown is characterized by a gradual increase in phytomass with age. The trend of dynamic changes is similar for all studied rating classes. It is ob-vious that stands of the first quality have the highest productivity of the studied classes. Decreased creditworthiness is accompanied by a gradual decline in productivity. It is investigated that the most significant differences in the phytomass parameters of different qualities are characteristic of older stands. It is calculated that the phytomass of the trunk in the bark varies from 5.4 t/ha (10 years) to 144 t/ha (80 years), and the nature of changes in the phytomass of the crown with age actually reflects the trend of phytomass dynamics of branches compared to pine. A comparative assessment of the dynamic changes of phytomass components of pine stands of the northern steppe part with the results of bioproductivity of pines of Ukrainian Polissya and Forest-Steppe, forest-steppe and northern-steppe regions of the European part, Kazakhstan and Siberia is given. On the basis of the received tables of dynamic changes of bioproductive processes in pines of the Northern Steppe the theoretical substantiation of practical use of normative-reference material for conditions of steppe part of Ukraine is made. The obtained results provide an opportunity to assess the current state of pine forests in the study region and predict the dynamics of their changes, which will allow the objective implementation of forestry measures, taking into account the regional peculiarities of pine formation.

INFLUENCE OF CLIMATE CHANGES ON TREE-RING CHARACTERISTICS OF SCOTS PINE PROVENANCES IN SOUTHERN SIBERIA (FOREST-STEPPE)

IAWA Journal ◽  
2003 ◽  
Vol 24 (4) ◽  
pp. 371-383 ◽  
Author(s):  
Yu.V. Savva ◽  
F.H. Schweingruber ◽  
E.A. Vaganov ◽  
L.I. Milyutin
Keyword(s):  
Tree Ring ◽  
Scots Pine ◽  
Weather Conditions ◽  
Steppe Zone ◽  
The Other ◽  
Forest Steppe ◽  
Statistical Parameters ◽  
Southern Siberia ◽  
Growth Variability ◽  
Local Weather

Scots pine provenances from all over Russia planted in 1964 at the forest- steppe zone were analyzed. Eight tree-ring characteristics from 12 different provenances were measured densitometrically. The time span of tree-ring observation covers the period from 1969 to 1997. The sensitivity coefficient of latewood width, latewood and maximum densities and latewood percentage decreases in relation to the increasing latitude of the provenances. The growth of all studied provenances is dictated by the local weather and climate. The correlation coefficients of indices between the local provenance and the other provenances are not lower than 0.46–0.97, and the synchronicity coefficients are minimally 0.84. The Euclidean distances vary from 0.11 to 0.13 between the local provenance and the other provenances. All statistical parameters show that the interannual variability reflects the prevailing influence of the local weather conditions. Variability of weather conditions determines up to 87% of the growth variability in the forest-steppe of southern Siberia.

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