scholarly journals The specifics of the tannin content in the wood of individuals of the genus spruce (Picea) in urban conditions (on the example of Izhevsk)

2021 ◽  
Vol 2 (44) ◽  
pp. 23-23
Author(s):  
Alexander Saakian ◽  
◽  
Keyword(s):  
Water Extract ◽  
Urban Ecosystem ◽  
Soil Conditions ◽  
Tannin Content ◽  
Picea Obovata ◽  
Stem Wood ◽  
Picea Pungens ◽  
Scientific Potential ◽  
Growing Conditions ◽  
Urban Conditions

The article presents materials on the study of the peculiarities of the tannin content in the wood of Picea obovata Ledeb. and Picea pungens Engelm., growing in the urban ecosystem, as well as in natural plantings outside the city. The growing conditions of the trees were characterized by a complex index of atmospheric pollution and soil conditions. The content of tannins in wood was determined by the spectrophotometric method based on the optical density of the water extract at a wavelength of 277 nm. The correlation between the content of tannins of stem wood and the state of atmospheric air is revealed, which can be explained by damage to the assimilation apparatus of trees. The dependence of the tannin content on the pH of the soil environment was also revealed. There were no statistically significant differences in the species, as well as in the place of growth. The research was carried out with the financial support of the grant "Scientific Potential – 2020". Keywords: PÍCEA OBOVATA, PICEA PUNGENS, TANNINS, CONIFERS, SPRUCE, RESISTANCE

scholarly journals Agroclimatological potential of tomato (Lycopersicon lycopersicum L.) production areas

2005 ◽  
Vol 53 (1) ◽  
pp. 19-26
Author(s):  
Zdeněk Žalud
Keyword(s):  
General Circulation ◽  
General Circulation Models ◽  
Limiting Factors ◽  
Soil Conditions ◽  
The Czech Republic ◽  
Lycopersicon Lycopersicum ◽  
Growing Conditions ◽  
Production Areas ◽  
Meteorological Elements ◽  
The Given

The methodology itself was based on assumption that the tomato growing areas are characterized by the certain minimum temperature sum required for the profitable production. It is obvious that the increase of the temperature predicted by the General Circulation Models will lead to the increase of these temperature sums over the whole area of the Czech Republic. However it is clear that not only meteorological elements but also suitable soil conditions are limiting factors for successful tomato growing. Therefore the presence of the predefined soil types was the second factor determining the suitability of the given region for the tomato growth. The results of the study confirmed the hypothesis that the global warming will lead to enlargement of the areas with suitable growing conditions for tomato and almost certainly for other kinds of vegetables. The changes are documented by the maps in order to identify the shifts in the distribution and extend of these areas on the district (NUTS 3) level.

scholarly journals A forested urban park : what is the value of Allan Gardens to the City of Toronto?

2021 ◽  
Author(s):  
Senna Sabir
Keyword(s):  
Forest Structure ◽  
Urban Forest ◽  
Soil Conditions ◽  
Analysis Tool ◽  
Property Value ◽  
Resource Analysis ◽  
Street Tree ◽  
Growing Conditions ◽  
The City ◽  
Forest Managers

The purpose of this study was to conduct an assessment of Allan Gardens' urban forest and to investigate the value of environmental and aesthetic benefits it provides the City of Toronto. This project used the Street Tree Resource Analysis Tool for Urban Forest Managers (STRATUM) model to assess forest structure, function, and monetary value of benefits. Soil in Allan Gardens was also investigated to determine the growing conditions for park trees. Results indicate that Allan Gardens maintained 309 trees that provide $60,407 annually in net annual environmental and property value benefits to the City of Toronto. Soil conditions in the park were found to be highly variable, where some locations were highly compacted and may be restricting tree root growth. To sustain and enhance these benefits in the future, Toronto's urban forest requires dedicated management and maintenance that includes new plantings, but prioritized protection and maintenance of existing trees and soil.

scholarly journals The Estimation of the Initial Stage of Succession of Green-pine Trees Windfall in the Eastern Moscow Suburbs

2020 ◽  
Author(s):  
Igor Zykov ◽  
Olga Khotuleva ◽  
Galina Egorova
Keyword(s):  
Life Forms ◽  
Pine Forests ◽  
Soil Conditions ◽  
Soil Mesofauna ◽  
Initial Stage ◽  
Longhorn Beetles ◽  
Standing Trees ◽  
Pine Trees ◽  
Growing Conditions ◽  
Degree Of Participation

The paper is devoted to the study of entomocomplex of stem pests, the number and biology of its dominant species and the ecological structure of the soil mesofauna of the two differing in composition and growing conditions, areas of wind pine forests-green insects. The main causes of windfalls, which are unfavorable soil and soil conditions and the defeat of trees by the root sponge, are established. The degree of participation of different types of feed substrate in the dynamics of the number of stem pests in the lesion is estimated. In addition to the windfall of trees, stem pests are the adjacent one, decreasing the resistance of pine in the walls of the forest, overmature trees or trees weakened by anthropogenic, standing trees, the trunks of which are damaged by windfall to a lesser extent than the remaining standing part of inboard of broken trunks. We identified eight species of entomophagous parasitic on the grubs of Longhorn beetles and jewel beetles. It is noted that the population of ground beetles, in windswept areas studied, is characterized by a decrease in species diversity, a decrease in the number of moisture-loving species typical of pine forests of the Eastern Moscow region, a change in the spectrum of life forms in the direction of reducing litter species and increasing the proportion of litter-soil.

scholarly journals Leaf mineral element content and soil characteristics on in vitro antioxidant and enzymatic inhibitory activities of aqueous fennel extracts

2021 ◽  
pp. 73
Author(s):  
Nesrine Majdoub ◽  
Soukaina el Guendouz ◽  
Jorge Carlier ◽  
Clara Costa ◽  
Carlos Alberto Correia Guerrero ◽  
...  
Keyword(s):  
Biochemical Characterization ◽  
Biological Properties ◽  
Mineral Elements ◽  
Soil Conditions ◽  
Human Consumption ◽  
Foeniculum Vulgare ◽  
Growing Conditions ◽  
Spearman’S Correlation

This study was conducted to evaluate the biochemical characterization of three harvested Foeniculum vulgare plants collected from two bioclimatic zones in order to investigate the soil growing conditions effect. The results showed a great variability of the phenolic amounts and biological properties of samples rely on localities. FvSEN contained the highest amounts of phenolic compounds. These amounts were accompanied by the greatest antioxidant ability through almost studied assays. FvSEN and FvZO were significantly different. In addition, the samples exhibited a significant and variable enzymatic inhibition activity with values ranging from 30 to 50 µg/mL for lipoxygenase assay. But these extracts did not revealed significant differences on their tyrosinase abilities. On the other hand, the levels of mineral elements were also estimated. These contents varied depending on sample and locality. The growing soil conditions of samples in terms of different parameters is likely related to their antioxidant and enzyme inhibition potentialities added to their mineral composition which settled by Spearman’s correlation. These data may confirm the interesting potential of F. vulgare as a valuable source for natural antioxidant molecules but the growing soil conditions can affect all the potentialities of these plants set for human consumption and other uses.

scholarly journals Implementation of information support mechanism for proactive management of urban ecosystem development

2020 ◽  
Vol 4 (4) ◽  
pp. 13-19
Author(s):  
N. V. Karpova ◽  
◽  
D. K. Chesheva ◽  
Keyword(s):  
Urban Areas ◽  
Urban Ecosystem ◽  
Information Support ◽  
Support Mechanism ◽  
Proactive Management ◽  
Economic Support ◽  
Effective Development ◽  
Favorable Conditions ◽  
Urban Conditions

The formation of information systems within the framework of ecological and economic support of urban-ized territories creates favorable conditions for justifying the harmonious state of the natural environment in urban conditions. Therefore, the development of information bases of ecological and economic orientation allows us to provide favorable conditions for the effective development of urban areas. In addition, the introduction of digital technologies will significantly improve the quality of architectural and planning solutions while achieving high environmental and economic efficiency of urbanization.

scholarly journals Effect of early to late wood proportion on Norway spruce biomass

2012 ◽  
Vol 60 (6) ◽  
pp. 287-292
Author(s):  
Radek Pokorný ◽  
Petra Rajsnerová ◽  
Jiří Kubásek ◽  
Irena Marková ◽  
Ivana Tomášková
Keyword(s):  
Norway Spruce ◽  
Aboveground Biomass ◽  
Stand Age ◽  
Allometric Relationships ◽  
The Czech Republic ◽  
Stem Wood ◽  
Late Wood ◽  
Growing Conditions ◽  
Summer Time ◽  
Lower Stem

Aboveground biomass, allometric relationships and early to late wood proportions were investigated in two even-aged monocultures of Norway spruce (Picea abies [L.] Karst) located at mountain and highland localities of the Czech Republic. However similar stand age and tree size, mountain trees comparing to them from highland showed less/tapering stems, lower aboveground biomass and lower stem wood density along the whole stem vertical profile as a result of different early to late wood proportion. These proportions were 79 % and 54 % for early wood, and 21 % and 46 % for late wood within mean stem annual circle in mountain and highland locality, respectively. These different proportions seem to reflected site specific growing conditions, particularly highly sufficient water availability during spring time in mountain region- support early wood growth, whereas elevated air temperature during summer time in highland region stimulate late wood growth.

scholarly journals A forested urban park : what is the value of Allan Gardens to the City of Toronto?

2021 ◽  
Author(s):  
Senna Sabir
Keyword(s):  
Forest Structure ◽  
Urban Forest ◽  
Soil Conditions ◽  
Analysis Tool ◽  
Property Value ◽  
Resource Analysis ◽  
Street Tree ◽  
Growing Conditions ◽  
The City ◽  
Forest Managers

The purpose of this study was to conduct an assessment of Allan Gardens' urban forest and to investigate the value of environmental and aesthetic benefits it provides the City of Toronto. This project used the Street Tree Resource Analysis Tool for Urban Forest Managers (STRATUM) model to assess forest structure, function, and monetary value of benefits. Soil in Allan Gardens was also investigated to determine the growing conditions for park trees. Results indicate that Allan Gardens maintained 309 trees that provide $60,407 annually in net annual environmental and property value benefits to the City of Toronto. Soil conditions in the park were found to be highly variable, where some locations were highly compacted and may be restricting tree root growth. To sustain and enhance these benefits in the future, Toronto's urban forest requires dedicated management and maintenance that includes new plantings, but prioritized protection and maintenance of existing trees and soil.

Extract of Trema Orientalis (L.) Stem Bark: A Potential Source of Environmentally Friendly Tanning Agent for Leather Industry

2022 ◽  
Vol 117 (1) ◽  
Author(s):  
Murshid Jaman Chowdury ◽  
Md. Abdur Razzaq ◽  
Md. Imran Biswas ◽  
Ariful Hai Quadery ◽  
Md. Tushar Uddin
Keyword(s):  
Water Extract ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Elevated Concentration ◽  
Tannin Content ◽  
Chemical Additives ◽  
Water Solvent ◽  
Trema Orientalis ◽  
Vegetable Tanning

Researchers around the world are in continuous endeavor to develop environment friendly tanning agent due to adverse effect of conventionally used chromium during leather tanning. Recent trend of tanning is thus heading to chrome-free and greener chemical processing options. Vegetable tanning is an exoteric leather processing technique because of their lower pollution load on the environment. Considering the inadequacy and high costing for the commercialized tannins, development of alternative tannins from locally available plants and their characterizations are important. In this research, the stem barks of Trema Orientalis (L.) were extracted at different temperatures employing water solvent with or without additives (sodium hydroxide or sodium sulphite) to attain phenolic-rich extractives. To ascertain appropriateness as a vegetable tanning agent, the obtained extracts were thereafter characterized in respect to yield, total phenolic content, tannin content and molecular structure. The extraction yield for all extracts improves and the quality remains nearly unchanged with temperature rising. The elevated concentration of chemical additives enhances the extraction yield but lessens the quality of extracts. In terms of extraction yield and the quality of extracts the best condition for extraction was discerned at 80°C with water solvent. This water extract has a decent extent of phenolic and tannin content of 266.13 mg Gallic acid equivalent/ gm of dry extract and 30.12 % respectively. The final extract exhibits excellent leather retanning tendency comparable to the commercial quebracho tannins.

scholarly journals Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties

2009 ◽  
Vol 55 (No. 5) ◽  
pp. 208-214
Author(s):  
O. Špulák ◽  
D. Dušek
Keyword(s):  
Dry Matter ◽  
Chemical Properties ◽  
Soil Conditions ◽  
Forest Site ◽  
Weed Species ◽  
Blue Spruce ◽  
Picea Pungens ◽  
The Impact ◽  
Humus Horizons

The impact of blue spruce (<I>Picea pungens</I>) and reed <I>Calamagrostis villosa</I>) cover on quantity and quality of upper soil layers was investigated. The research was conducted in the Jizerské hory Mts., Czech Republic (altitude 880 m, acidic spruce forest site type – 8K). Mean weight of dry matter of holorganic horizons was similar under both variants. Totally, there were accumulated 153 t/ha of dry matter of humus horizons in blue spruce and 174 t/ha in reed. Soil pH (KCl) varied from 3.7 to 3.2 under blue spruce stand and from 3.6 to 3.3 under reed. The differences of concentrations of nutrients (P, K, Ca, Mg) were not found significant either. Only L horizon showed significant differences: there were higher values of cation exchangeable capacity (T) and higher content of exchangeable bases (S) under reed. We found very similar forest-floor humus properties under both species. Therefore we can not state worsening of the soil conditions under blue spruce compared to areas covered with tested forest weed species.

scholarly journals Longevity of Ulmus pumila L. in protective afforestation on semi-desert lands of the Astrakhan Zavolzhye

2021 ◽  
Vol 16 (1) ◽  
pp. 77-85
Author(s):  
Vladimir Vasilievich Lepesko ◽  
Ludmila Petrovna Rybashlykova
Keyword(s):  
Sandy Loam ◽  
Steppe Zone ◽  
Ecological Effect ◽  
Soil Conditions ◽  
Ulmus Pumila ◽  
Dry Steppe ◽  
Two Factors ◽  
Forest Reclamation ◽  
Growing Conditions ◽  
Improved Technology

The article provides a predictive assessment of longevity of Ulmus pumila L. stands in the Astrakhan Zavolzhye. The effi and expediency of renewable logging for rejuvenation and increasing the longevity of plantings in the semi-desert were confi The classifi of ecotopes of the Astrakhan Zavolzhye on suitability for cultivation of protective and shadow elm plantings on pasture lands was developed and presented. In the Caspian region, Ulmus pumila became widespread in forest reclamation of semi-desert lands in the 1950s. Since then, till the beginning of the 1990s, Bogdinskaya research agroforestry experimental station laid on the sandy massifs about 1 thousand hectares of Ulmus pumila L. plantings, which currently amounts to 1824 %. The long-term practice of using protective shade Ulmus pumila umbrellas has shown their signifi ecological effect on functioning pastures. The aim of the research was to develop an improved technology for creating long-lived protective shade stands of Ulmus pumila on degraded pastures of the Astrakhan Zavolzhye. The research was carried out using generally accepted methods of stand forest taxation by A.P. Anuchin (1961), 1. Bitvinskas (1974) and A.S. Manaenkov (2001). Soil conditions were studied by drilling sounding to 3 m depth. The results of the research revealed that the longevity of wood species in the dry-steppe zone was determined mainly by two factors: productive moisture in the soil and salinity level. The most favorable growing conditions for Ulmus pumila were unsalted (to a depth of at least 3 m) brown sandy soils, sandy loam soils, dark-colored swale soils with periodic redistributed accumulation of moisture. In arid conditions of the Astrakhan Zavolzhye in island plantations (group of trees, umbrellas, 0.51 ha parts of forest area) and optimal growing conditions without logging and reforestation, Ulmus pumila lives up to 6070 years.

Sign in / Sign up

Export Citation Format

Share Document