scholarly journals Radial growth patterns of Siberian larch in plantations of the Republic Mari El

2021 ◽  
Vol 932 (1) ◽  
pp. 012010
Author(s):  
Iu P Demakov
Keyword(s):  
Radial Growth ◽  
Annual Ring ◽  
Growth Parameters ◽  
Siberian Larch ◽  
Weather Conditions ◽  
Growth Patterns ◽  
Annual Growth ◽  
Total Width ◽  
Growth Indices ◽  
The Republic

Abstract Based on the measurements of 83 wood cores, the main patterns of changes in the width of the early and late zones in the annual ring of Siberian larch trees (Larix sibirica Ledeb.), as well as their total radial growth indices in the conditions of the Republic of Mari El were identified. It was found that the width of the early wood zone varies in trees from 0.15 to 11.3 mm, late wood – from 0.05 to 4.15 mm, the proportion of latewood – from 1.2 to 82.8 %, and the annual growth indices - from 13 to 423 %. The main factor in the variability of the total width of the annual rings and the layer of early wood is the age of the trees, and the contribution of weather conditions and other unaccounted factors (noise) to the overall variance of the annual growth parameters is no more than 20 %. The variability of the total width of the annual ring also depends on their genotypic features, which determine up to 42.7% of the total variance of the parameter in some cenopopulations. In the dynamics of the growth indices of larch trees, despite the existing specifics of each cenopopulation, the general sharp decline in their values after the droughts of 1972 and 2010, as well as the alternation of the periods of growth and decline, is clearly distinguished.

PATTERNS IN GROWTH OF EARLYWOOD, LATEWOOD, AND PERCENTAGE LATEWOOD DETERMINED BY COMPLETE ANALYSIS OF 18 DOUGLAS-FIR TREES

1966 ◽  
Vol 44 (4) ◽  
pp. 453-466 ◽  
Author(s):  
J. H. G. Smith ◽  
L. Heger ◽  
J. Hejjas
Keyword(s):  
Pseudotsuga Menziesii ◽  
Radial Growth ◽  
Annual Ring ◽  
Ring Width ◽  
Height Growth ◽  
Douglas Fir ◽  
Growth Patterns ◽  
Complete Analysis ◽  
Annual Rings ◽  
Breast Height

Widths of earlywood and latewood in each annual ring, measured on an average radius on a disk taken halfway between each branch whorl, were analyzed to define their variation in 18 Douglas-fir trees (Pseudotsuga menziesii (Mirb.) Franco). Distribution of ring width and percentage latewood also was investigated in these trees which had from 20 to 50 whorls above stump height. Multiple regression and correlation analyses showed that number of rings from pith, and its reciprocal, square, or logarithm accounted for most of the variation in radial growth. Number of rings from pith influenced thickness of both earlywood and latewood much more than the climatic differences reflected by variations in annual height growth and in widths of earlywood and latewood formed at breast height in the same calendar year. Since earlywood and latewood are distributed differently and controlled by different factors, they should be studied separately within annual rings. The statistical methods used in this study provide a simple, efficient, and comprehensive basis for thoroughly describing growth patterns, and for objectively analyzing factors that govern growth.

Irrigation regime and water consumption of potatoes in the Republic of Bashkortostan, depending on the reclamation condition of lands

2020 ◽  
Vol 0 (6) ◽  
pp. 13-19
Author(s):  
Guzel Gumerova ◽  
Georgiy Gulyuk ◽  
Dmitry Kucher ◽  
Anatoly Shuravilin ◽  
Elena Piven
Keyword(s):  
Water Consumption ◽  
Weather Conditions ◽  
Growing Season ◽  
Vegetation Period ◽  
Forest Steppe ◽  
Total Water ◽  
Total Water Consumption ◽  
Republic Of Bashkortostan ◽  
Irrigated Lands ◽  
The Republic

Data of long-term researches (2015–2018) in southern forest-steppe zone of the Republic of Bashkortostan, is justified theoretically and experimentally the mode of irrigation of potatoes on leached chernozems of unsatisfactory, satisfactory and good ameliorative condition of irrigated lands. For the growing periods of potatoes with different heat and moisture supply, the number of watering, the timing of their implementation, irrigation and irrigation norms are established. On lands with unsatisfactory meliorative state the number of irrigation depending on weather conditions of potato vegetation period varied from 0 to 3 (1.5 on average) with average irrigation norm – 990 m3/ha. With satisfactory meliorative state of lands the number of irrigation on average increased from 0 to 4 (2.3 on average) with irrigation norm – 1305 m3/ha. On lands with good meliorative state the number of irrigation was the highest – from 1 to 5 (3 on average) with average irrigation irrigation norm is 1653 m3/ha. It was noted that in the dry periods of potato vegetation the greatest number of watering was carried out (3–5 watering), and in the wet periods (2017) watering was not carried out except for the area with a good reclamation state, where only one irrigation was carried out by the norm of 550 m3/ha. Water consumption of potato was studied in dynamics as a whole during the growing season and the months of the growing season depending on weather conditions of vegetation period and land reclamation condition of irrigated lands, as well as in the control (without irrigation). The lowest total water consumption was in the area without irrigation and averaged 226.8 mm. In irrigated areas, its values increased to 319-353.4 mm. The average daily water consumption varied from 2.12 to 3.3 mm. The highest rates of potato water consumption were observed in June and July, and the lowest – in May and August. In the total water consumption of potatoes on the site without irrigation, the largest share was occupied by atmospheric precipitation and in addition to them the arrival of moisture from the soil. Irrigation water was used in irrigated areas along with precipitation, the share of which was 30.2–46.1 %.

INFLUENCE OF INVESTMENTS ON THE ECONOMIC GROWTH OF THE COUNTRY

2020 ◽  
Vol 7 (3) ◽  
pp. 28-33
Author(s):  
Ravshan Mamatov ◽  
Keyword(s):  
Economic Growth ◽  
Annual Growth ◽  
Production Factors ◽  
Fixed Assets ◽  
Production Growth ◽  
Total Investment ◽  
The Republic ◽  
Investment In Fixed Assets

The economic growth of the Republic of Uzbekistan will depend on production factors that contribute to the annual growth of the country's GDP. At the same time, extensive production growth will lead to the implementation of unpromising investments. A growing share of innovation-oriented investments in the total investment in fixed assets in the country will lead to intensive economic growth in the country

scholarly journals Comparison of the Radial Growth Response of Picea crassifolia to Climate Change in Different Regions of the Central and Eastern Qilian Mountains

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1015
Author(s):  
Xuan Wu ◽  
Liang Jiao ◽  
Dashi Du ◽  
Changliang Qi ◽  
Ruhong Xue
Keyword(s):  
Climate Change ◽  
Tree Growth ◽  
Central Region ◽  
Radial Growth ◽  
Growing Season ◽  
Qilian Mountains ◽  
Growth Patterns ◽  
Total Precipitation ◽  
Picea Crassifolia ◽  
The Qilian Mountains

It is important to explore the responses of radial tree growth in different regions to understand growth patterns and to enhance forest management and protection with climate change. We constructed tree ring width chronologies of Picea crassifolia from different regions of the Qilian Mountains of northwest China. We used Pearson correlation and moving correlation to analyze the main climate factors limiting radial growth of trees and the temporal stability of the growth–climate relationship, while spatial correlation is the result of further testing the first two terms in space. The conclusions were as follows: (1) Radial growth had different trends, showing an increasing followed by a decreasing trend in the central region, a continuously increasing trend in the eastern region, and a gradually decreasing trend in the isolated mountain. (2) Radial tree growth in the central region and isolated mountains was constrained by drought stress, and tree growth in the central region was significantly negatively correlated with growing season temperature. Isolated mountains showed a significant negative correlation with mean minimum of growing season and a significant positive correlation with total precipitation. (3) Temporal dynamic responses of radial growth in the central region to the temperatures and SPEI (the standardized precipitation evapotranspiration index) in the growing season were unstable, the isolated mountains to total precipitation was unstable, and that to SPEI was stable. The results of this study suggest that scientific management and maintenance plans of the forest ecosystem should be developed according to the response and growth patterns of the Qinghai spruce to climate change in different regions of the Qilian Mountains.

Relatii temporale între parametrii climatici si cresterile anuale ale speciilor forestiere (studiu de caz)

2019 ◽  
Author(s):  
Maria Nedealcov ◽  
◽  
Ala Donica ◽  
Ion Agapi ◽  
Nicolae Grigoras ◽  
...  
Keyword(s):  
Climatic Factors ◽  
Growth Parameters ◽  
Ring Width ◽  
Aridity Index ◽  
Quercus Petraea ◽  
Distribution Area ◽  
Natural Distribution ◽  
Annual Ring Width ◽  
Republic Of Moldova ◽  
The Republic

The forests on the natural distribution area from the silvosteppe zone, under the influence of climate change will experience major changes in their structure and functioning. The analysis of growth parameters for Fraxinus excelsior, Quercus petraea, Q. robur in three experimental areas from center of the Republic of Moldova indicates that the radial growth processes are influenced by the same complex of climatic factors, which differ being dendroclimatic response intensity. It has been shown that between the annual tree growth and forest aridity index - FAI, there are close correlations: the higher FAI values indicate the lower annual growth of the trees, and vice versa, low FAI values identify good development conditions of the stands (higher increases in the annual ring width).

MARINE BIOGENIC CARBONATES AND RADIOCARBON—A RETROSPECTIVE ON SHELLS AND CORALS WITH AN OUTLOOK ON CHALLENGES AND OPPORTUNITIES

Radiocarbon ◽  
2021 ◽  
pp. 1-16
Author(s):  
Susanne Lindauer ◽  
Carla S Hadden ◽  
Kita Macario ◽  
Thomas P Guilderson
Keyword(s):  
Calcium Carbonate ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Growth Patterns ◽  
Annual Growth ◽  
Environmental Research ◽  
Climate Research ◽  
Marine Carbonates ◽  
Challenges And Opportunities ◽  
Biogenic Carbonates

ABSTRACT Many organisms living in the ocean create tests, shells, or related physical structures of calcium carbonate (CaCO3). As this is most often from dissolved inorganic carbon, using organisms that create calcium carbonate structures for climate research and dating purposes requires knowledge of the origin of carbon that is incorporated. Here, we give a short overview of research on marine carbonates over the last 60 years, especially that based on shell and coral samples. Both shells and corals exhibit annual growth patterns, like trees, and therefore offer possibilities for yearly resolution of past radiocarbon (14C) variations. We concentrate on their evolution in 14C dating including difficulties in determining reservoir ages as well as the possibilities they offer for archaeological dating, oceanography, calibration purposes as well as environmental research in general.

scholarly journals A synthesis of radial growth patterns preceding tree mortality

2016 ◽  
Vol 23 (4) ◽  
pp. 1675-1690 ◽  
Author(s):  
Maxime Cailleret ◽  
Steven Jansen ◽  
Elisabeth M. R. Robert ◽  
Lucía Desoto ◽  
Tuomas Aakala ◽  
...  
Keyword(s):  
Radial Growth ◽  
Tree Mortality ◽  
Growth Patterns

scholarly journals Climatic Regionalization and the Spatio-Temporal Occurrence of Extreme Single-Year Drought Events (1500–1998) in the Interior Pacific Northwest, USA

2002 ◽  
Vol 58 (3) ◽  
pp. 226-233 ◽  
Author(s):  
Paul A. Knapp ◽  
Henri D. Grissino-Mayer ◽  
Peter T. Soulé
Keyword(s):  
Pacific Northwest ◽  
Radial Growth ◽  
Extended Period ◽  
Growth Indices ◽  
Spring Precipitation ◽  
Enso Events ◽  
Western Juniper ◽  
Northern Nevada ◽  
The Pacific ◽  
Spatio Temporal

AbstractTree-ring records from western juniper (Juniperus occidentalis var. occidentalis Hook.) growing throughout the interior Pacific Northwest identify extreme climatic pointer years (CPYs) (i.e., severe single-year droughts) from 1500–1998. Widespread and extreme CPYs were concentrated in the 16th and early part of the 17th centuries and did not occur again until the early 20th century. The 217-yr absence of extreme CPYs may have occurred during an extended period of low variance in the Pacific Decadal Oscillation. We mapped climatic boundaries for the interior Pacific Northwest based on the location of sites with similar precipitation variability indices. Three regions, the Northwest (based on chronologies from nine sites), the Southwest (four sites), and the East (five sites) were identified. Our results suggest that western juniper radial growth indices have substantial interannual variability within the northwestern range of the species (central Oregon), particularly when compared with western juniper growing in its eastern range (eastern Oregon, southeastern Idaho, and northern Nevada) and southwestern range (southern Oregon and northeast California). We suspect that the substantial differences in the variability of western juniper radial growth indices are linked to the influence of ENSO events on winter/spring precipitation amounts.

scholarly journals Cropping capacity of winter rye cultivated for fodder

2022 ◽  
Vol 1 (49) ◽  
pp. 1-1
Author(s):  
Galina Konieva ◽  
◽  
Vitalii Ochirov ◽  
Vera Ivanova ◽  
Rustam Shabanov
Keyword(s):  
Plant Height ◽  
Dry Matter ◽  
Central Zone ◽  
Weather Conditions ◽  
Crop Productivity ◽  
Yield Potential ◽  
Winter Rye ◽  
Green Fodder ◽  
Cultivation Technology ◽  
The Republic

Realization of the yield potential depends on the biological characteristics of the variety, cultivation technology and weather conditions. The article presents the results of studies carried out in 2018-2021. on the productivity of various varieties of winter rye in dryland conditions of the central zone of the Republic of Kalmykia. The fresh yield of winter rye harvested for fodder depended on the variety. Its highest index was obtained for the Saratovskaya 4 variety and amounted to 17.7 ... 26.9 t / ha. The analysis of the productivity of winter rye harvested for green fodder showed that the studied varieties provided the yield of dry matter at the level of 5.4 ... 7.1 t / ha on average for three years. All varieties have good winter hardiness. Keywords: WINTER RYE, VARIETY, NAKED FALLOW, PLANT HEIGHT, GREEN MASS, FRESH YIELD, CROP PRODUCTIVITY, DRY MATTER

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