Issues


Issues: 1-5 | 6-10
Downloads: 174

COMPARATIVE STUDY ON PHYSIOLOGICAL
POTENTIAL OF PINUS SYLVESTRIS L.
AND PINUS BUNGEANA ZUCC. EX ENDL.
TO GROW IN BULGARIAN URBAN PARKS

Svetoslav Anev

Department of Dendrology, Faculty of Forestry, University of Forestry,
10 Kliment Ohridski blvd., 1797 Sofia, Bulgaria.
E-mail: svetoslav.anev@gmail.com

Abstract:

Pinus bungeana Zucc. ex Endl. is a picturesque multi-trunked pine tree native to north-eastern
and central China with symmetrical crown and grey-green, mottled, exfoliating bark. This species
is already introduced into European urban parks, although there is still limited information
about its appearance when full grown. The first P. bungeana tree in Bulgaria was planted in the
arboretum of the University of Forestry in Sofia. The aim of this study is to compare needle gas
exchange in this tree and Pinus sylvestris L. Both experimental trees are at similar age and grow
out of their natural range of distribution. The net photosynthesis (AN) in response to various air
temperatures and light conditions was analyzed in both P. bungeana and P. sylvestris needles.
Temperature and light responses of photosynthesis obtained in this study show insignificant differences
between P. bungeana and P. sylvestris. The established features are sings for higher
tolerance of P. bungeana to shade and cold, than P. sylvestris. Therefore, it can be assumed that
P. bungeana has physiological potential to grow in Bulgarian urban parks, similar to P. sylvestris.
 

(Forestry Ideas, 2016, Vol. 22, No. 2) [Download]
Downloads: 130

NON-DESTRUCTIVE ALLOMETRIC METHOD
FOR ESTIMATION OF LEAF AREA IN COMMON
BEECH (FAGUS SYLVATICA L.)

Svetoslav Anev (1)*, Petya Dimitrova-Mateva (2), Sabah Lamlom (3),
Ganka Chaneva (4), and Nikolina Tzvetkova (1)

1. Department of Dendrology, Faculty of Forestry, University of Forestry,
10 Kliment Ohridski blvd., 1797 Sofia, Bulgaria
*E-mail: svetoslav.anev@gmail.com
2. South-West State Forest Company, Ministry of Agriculture,1 Antim I Str., 1000 Sofia, Bulgaria
3. Faculty of Natural Resources and Environmental Sciences,
University of Omar Al-Mukhtar, Al Baida, Libya
4. Faculty of Biology, Sofia University ’St. Kliment Ohridski‘,8 Dragan Tzankov Blvd., 1164 Sofia, Bulgaria

Abstract:

A model for leaf area (LA) determination in Common beech (Fagus sylvatica L.) was developed
by using leaves from two different elevation sites. The leaf mass (LM), lamina width (LW),
lamina length (LL), and LA were all measured after excision of leaves from the plants in an open
source software ImageJ. Best subsets regression analysis for relations between LA and different
combinations of LW and LL was performed. The proposed best-fit LA-estimation model is:
LA = 2.40·LL+ 6.65·LW – 23.77. The established highly significant relation (R2 = 0.98, P-value <
0.001, d.f. = 177) between LA and leaf width and length allows this mathematical model to be used
for simple non-destructive field calculation of LA in Common beech, which can thus be tremendously
time saving without compromising on accuracy.
 

(Forestry Ideas, 2016, Vol. 22, No. 2) [Download]
Downloads: 208

HEIGHT STRUCTURE OF COPPICE OAK (HUNGARIAN,
SESSILE AND TURKEY) STANDS

Rumen Petrin and Ivaylo Markoff

Forest Research Institute, Bulgarian Academy of Sciences, 1756 Sofia, Bulgaria.
E-mail: lesni4eja2014@gmail.com

Abstract:

The study has intended to reveal the height structure of relatively even-aged coppice stands
of Hungarian oak (Quercus conferta L.), Sessile oak (Quercus petraea Liebl.) and Turkey oak
(Quercus cerris L.) according to thickness levels in terms of curve forms, and to look for the general
regularities occurring with these. Based on a total of 59 sample plots, the height curves have
been investigated for the three groups of stands according to tree species. The height curves
have been transformed into relative height curves and multiplied by the respective numbers of
trees in order to obtain the complex relative height curves. Due to the numbers of trees, the
complex relative height curves obtain paraboloid shape, and these have been investigated for
finding out their asymmetry in terms of breast-height diameter, i.e. the natural thickness level of
1.0. The complex height curves have been investigated while using a special coefficient of asymmetry
(Cas). As a result of the investigations, the distribution of sample plot numbers according to
height structure asymmetry for the three investigated aggregates is almost the same. The average
curves’ values of the normal numbers have been calculated for the three aggregates through
the natural indicators’ method of Douhovnikov (1966), and the average curves have been compared
with the uniform average curve of normal numbers by Tyurin. Extreme similarities of the
curves’ aspects have been found, which confirms that the tree species does not have substantial
influence upon the height structure of stands.
 

(Forestry Ideas, 2016, Vol. 22, No. 2) [Download]
Downloads: 138

FOREST-FIRE PROTECTION INFRASTRUCTURES
IN NATURAL PROTECTED AREAS WITH MANAGEMENT
BODIES ΙΝ GREECE

Konstantinos S. Tsiolis (1)* and Georgios Sp. Efthimiou (2)

1. Forester, Fire Brigade Officer, 43100 Karditsa, Greece. *E-mail: kostaskard@hotmail.com
2. Department of Forestry and Natural Environment Management, Technological Educational
Institute of Sterea Hellas, 36100 Karpenissi, Greece.
E-mails: gefthi@yahoo.gr, efthimiou@teiste.gr

Abstract:

The recent global climate change has already increased the risk of fire in Mediterranean forests,
including protected natural areas. The adaptation options for fire protection that are related
to forest fires and to climate change contain measures, which are relative to the management of
biomass, the prevention and fighting of fires with proper infrastructure and, above all, with public
sensitization. This research endeavours to examine the current situation of the above measures
and to evaluate the 28 Management Bodies (M.B.) that are responsible for the corresponding
28 protected areas of Greece. As a research tool, the questionnaire method was used, in order
to record and to evaluate the views of the land-use managers and scientists in each of the 28
Protected Areas (P.A.). The survey reveals differences among the various national parks with
regard to fire-protection measures, as well as to the effectiveness of fire-fighting and public commitment,
which were estimated to be more important than the management of fuel biomass. The
results were evaluated in the light of a critical review of measures used in preventing and managing
fires.
 

(Forestry Ideas, 2016, Vol. 22, No. 2) [Download]
Downloads: 132

EXISTING AGROFORESTRY SYSTEM
AND ITS COMPONENT IN TEHRI DISTRICT
OF GARHWAL HIMALAYA

Kundan K. Vikrant (1)*, Dhanpal S. Chauhan (1), and Raza H. Rizvi (2)

1. Department of Forestry & NR, HNB Garhwal University, Srinagar, Garhwal, Uttarakhand –
246174, India. *E-mail: kundankumarvikrant@gmail.com
2. Central Agroforestry Research Institute, Jhansi, Uttar Pradesh – 284003, India

Abstract:

The present study was conducted to investigate the existing agroforestry system and its component
along altitudes in traditional agroforestry systems in Tehri district Garhwal Himalaya, India.
Three different altitudes were considered: lower (286–1200 m), middle (1200–2000 m) and high
altitude (2000–2800 m). All agroforestry components along altitudes were presented including
trees, fruit trees and crops. The proportion of trees, fruit trees, and crops were 45.8 %, 22.9 %
and 31.2 %, respectively. Total 22 forest tree species, 11 fruit tree species, and 15 crops species
were recorded in the study area. The agri-silviculture, agri-horticulture and agri-hortisilviculture
were the common agroforestry systems recorded in the region.

(Forestry Ideas, 2016, Vol. 22, No. 2) [Download]
Issues: 1-5 | 6-10