scholarly journals Observations on the nutrient status in air polluted urban forest stands.

Silva Fennica ◽  
1981 ◽  
Vol 15 (4) ◽  
Author(s):  
Tuulikki Pakonen
Keyword(s):  
Urban Forest ◽  
Nutrient Status ◽  
Forest Stands

The micrometeorology of the urban forest

1989 ◽  
Vol 324 (1223) ◽  
pp. 335-349 ◽  
Keyword(s):  
Urban Forest ◽  
Urban Climate ◽  
Environmental Design ◽  
Local Scale ◽  
Urban Trees ◽  
Single Specimen ◽  
Air Filtration ◽  
Forest Stands ◽  
Planted Forest

Urban trees occupy a wide variety of habitats, from a single specimen competing in the urban jungle to extensive remnant or planted forest stands. Each is shown to produce distinct micro- to local scale climates contributing to the larger urban climate mosaic. These effects are discussed in relation to the radiative, aerodynamic, thermal and moisture properties of trees that so clearly set them apart from other urban materials and surfaces in terms of their exchanges of heat, mass and momentum with the atmosphere. Their resulting ability to produce shade, coolness, shelter, moisture and air filtration makes them flexible tools for environmental design.

scholarly journals Growth and Nutrient Status of Foliage as Affected by Tree Species and Fertilization in a Fire-Disturbed Urban Forest

Forests ◽  
2015 ◽  
Vol 6 (12) ◽  
pp. 2199-2213 ◽  
Author(s):  
Choonsig Kim ◽  
Jaeyeob Jeong ◽  
Jae-Hyun Park ◽  
Ho-Seop Ma
Keyword(s):  
Tree Species ◽  
Urban Forest ◽  
Nutrient Status

scholarly journals Stacked-timber ratio and stem volume of horse chestnut trees within Kyiv City urban stands

2020 ◽  
Vol 11 (2) ◽  
pp. 32-39
Author(s):  
O. M. Lesnik
Keyword(s):  
Form Factor ◽  
Urban Environment ◽  
Urban Forest ◽  
Factor Model ◽  
Form Factors ◽  
Stem Volume ◽  
Horse Chestnut ◽  
Forest Stands ◽  
Growth Environment ◽  
Forest Mensuration

Urban forest are influenced by urban environment, what has a negative effect on the vital activities of the trees. Growth environment of trees on urban territories and in natural areas are completely different. Research data was collected in urban forest stands of Kyiv city during thinnings. Special methodological characteristics of the measuring of main biometrical tree parameters in urban area are explained in this work. Importantly, chestnut trees have morphological feature which stems are branching on the certain height leading to occurrence of the several main branches. Modelling tree stem volume, the most important pattern to find was a mathematical dependence of form factors on the main tree biometrical parameters. Basic descriptive statistics of chestnut trees parameters were estimated. It is defined that the percentage of trunk volume decreases with an increase of tree diameter and in trees over 60 cm can make up to 30% of the total tree volume. Carrying out a correlation analysis of model trees, it was examined that form factors of tree stems were highly linked to the branching height. Based on the statistical analysis it was estimated that developed mathematical model reflected empirical data adequately and could be validated according to the current forest mensuration accuracy requirements properly. Moreover, a bias of the developed form factor model examined using Student t-criteria is not significant. Respective information-support tables to estimate stem volume of chestnut trees were created based on the developed form factor model, harnessing the classical formula of forest mensuration. Given stem volume tables created considering physiological features of chestnut trees under urban environment conditions can be utilized by the organizations which manage forest stands and parks within settlements.

The dynamics of changes in the structure and species composition of primary forest stands in selected areas of Pieniny National Park

2011 ◽  
Vol 72 (4) ◽  
pp. 339-356 ◽  
Author(s):  
Andrzej Jaworski ◽  
Dorota Jakubowska
Keyword(s):  
Species Composition ◽  
National Park ◽  
Primary Forest ◽  
Forest Stands

Dynamika zmian budowy, struktury i składu gatunkowego drzewostanów o charakterze pierwotnym na wybranych powierzchniach w Pienińskim Parku Narodowym

Sidrophore Production and Phosphate Solubilization by Bacillus cereus and Pseudomonas fluorescens Isolated from Iraqi Soils and Soil Characterization

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
Zaid Raad Abbas ◽  
Aqeel Mohammed Majeed Al-Ezee ◽  
Sawsan H
Keyword(s):  
Bacillus Cereus ◽  
Pseudomonas Fluorescens ◽  
Phosphate Solubilization ◽  
Bacterial Species ◽  
Nutrient Status ◽  
Bacterial Count ◽  
Soil Samples ◽  
Phosphate Solubilizing Bacteria ◽  
Clear Zone ◽  
Zone Formation

This study was conducted to explore the ability of Pseudomonas fluorescens and Bacillus cereus to solubilizing a phosphate in soil for enhancing the planting growth and, its relation with soill characterization. The isolates were identified as P.fluorescens and B. cereus using convential analysis and, its phosphate solubilization ability and sidrophore was shown by the clear zone formation on National Botanical Research Institute���s Phosphate medium. Moreover, Pseudomonas fluorescens isolates (n = 9) and three of B. cereus isolated from agricultural area in Baghdad university, Mustansiriyah university and Diyala bridge. Results displayed that bacterial count were varied in soil samples according to their region, and ranging from 30 to 60 *10 2 CFU/g in Baghdad university soil to 10���20 *10 2 CFU/g in Mustansiriyah university soil, the Baghdad soil macronutrient which included: NH4, NO3, P, and K were, 8.42, 20.53, 19.09, 218.73 respectively, While the physio analysis revealed that the mean of pH was 7.3 and EC was 8.63. on the other hand the micronutrient analysis indicated that the soil samples were included Ca, Fe, Mn, Zn and Cu which gave their mean 5025.9, 8.9, 4.9, 0.5 and 1.5 respectevily. Results revealed that all isolated bacteria (9 isolates of P.fluorescens and three isolates of B. cereus gave ahalo zone which mean their ability to be phosphate solubilizing bacteria at 100%. Results revealed that all isolated bacteria were detected a ability to produce high levels from chelating agents (siderophores)) by P.fluorescens and. B cereus at 100%, when appeared ahalo clear zone. Furthermore, the high levels of phosphate solubilization and siderophore production were grouped in bacterial species isolated from Iraqi soils. might be attributed to many soil factors such as soil nutrient status, soil acidity, water content, organic matter and soil enzyme activities.

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