Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userThe Accumulative Capacity of Pinus brutia and Cupressus sempervirens to Lead (Pb) and Zinc (Zn)
المقدرة التراكمية عندالسرو دائم الاخضرار (Cupressus sempervirens) و الصنوبر البروتي (Pinus brutia) لعنصري الرصاص (Pb) و الزنك (Zn)
1349
0 61
0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2013
fields
Forestry and Ecology
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
هدفت هذه الدراسة إلى معرفة و مقارنة مقدرة نوعين نباتيين هما الصنوبر البروتي (Pinus brutia) ،السرو دائم الاخضرار (Cupressus sempervirens) المزروعة ضمن مصفاة بانياس على مراكمة عنصري الرصاص (Pb) و الزنك (Zn) الناتجة بشكل أساسي عن الانبعاثات من المصفاة. جمعت العينات النباتية من الأوراق و القلف و الخشب للأنواع المدروسة بالإضافة إلى عينات من التربة المحيطة بها، و تم تقدير تراكيز العناصر فيها باستخدام جهاز التحليل الطيفي بالامتصاص الذري (atomic absorption spectrophotometer). و قد أظهرت النتائج عدم وجود تلوث كبير بهذين العنصرين و كذلك عدم وجود فروق معنوية بين النوعين النباتيين في مراكمة الرصاص و الزنك حيث تراوحت كمية الرصاص في الأنواع النباتية للأجزاء النباتية المدروسة بين 24.96-30.84 ppm)) في الصنوبر البروتي و (24.05- 30.23 ppm) في السرو دائم الاخضرار، بينما تراوحت كميات الزنك بين (34.99 -82.99 ppm) في الصنوبر البروتي و (18.11-59.86 ppm) في السرو دائم الاخضرار. كما أكدت هذه الدراسة تفوق قلف الصنوبر البروتي على باقي الأجزاء النباتية الأخرى في مراكمة الرصاص، في حين تفوقت أوراق السرو دائم الاخضرار على باقي الأجزاء النباتية الأخرى في مراكمة الزنك.
This study aims to investigate the abilities of two tree species (Pinus brutia and Cupressus sempervirens) planted in Banias Refinery Company to absorb and accumulate lead and zinc basically emitted by the Refinery. Samples of the planted species (leaves, bark, and wood) and soil from around the plants were collected and analyzed by atomic absorption spectrophotometer. The results did not show significant pollution with these two elements. Moreover, there were not any significant differences between the two species in terms of the accumulation of Pb and Zn. While the Pb concentrations ranged between (24.96-30.84 ppm) for P. brutia and (24.05-30.23 ppm) for C. sempervirens, the Zn concentrations ranged between (34.99-82.99 ppm) for P. brutia, (18.11-59.86 ppm) for C. sempervirens. It was also revealed that P. brutia bark accumulated Pb more than the other parts, whereas C. sempervirens leaves accumulated Zn more than the other parts.
References used
ASHRAF,M.,OZTURK,M.&AHMAD,M.S.A. Plant adaptation and phytoremediation. Springer Science+ Business Media B.V.,London New York,2010,1-481
AZHAR,N.,ASHRAF,M.Y.,HUSSAIN,M.&HUSSAIN,F .Phytoextraction of Lead (Pb) by EDTA application through Sunflower (Hellanthus Annuus L.) Cultivation:Seedling Growth studies .Pak.j.Bot.,38(5) , 2006, 1551-1560
BASLAR,S.,DOGAN,Y.,DURKAN,N.&BAG,H. Biomonitoring of Zinc and Manganese in bark of Turkish red pine of western AnTOLIA.Journal of Environmental Biology,30(5), 2009, 831-834
rate research
Read More
The effect of salinity and the treatment with fungicide on seed germination of Cupressus
sempervirens L. was investigated.
Five concentrations of salinity (0, 0.5, 1, 5 and 10%) were used. One part of the seeds was
treated with fungicides (Benomyl
), while the other part was germinated without fungicide
treatment. The results showed that seed germination was reduced by salinity, but the reduction was
more pronounced without fungicide and with salt concentration, the seeds didn't germinate at 5 and
10% NaCl.
Despite the decrease of germination indices with the increase of salt concentrations, the
statistical results didn't show significant differences in salinity concentrations and the control in
germination speed without fungicide, but they were significant with the fungicide. The statistical
results showed significant differences between the presence and absence of fungicide in all
treatments
Pinus brutia cover 67.87% of AlFronloq protected area, this forest provide habitat
for wildlife especially forest birds. The aim of this study is to define bird species that use
Pinus brutia forest and their relation to vegetation characteristics.W
e listed 63 bird species,
9 of them recorded for first time, 31.8% of species are resident in study area, where
raptors presented 15.9%.
The study showed positive correlation between species richness and plant richness
(R=0.588, P= 0.007). Shrubs layer coverage and richness affected positively bird species
richness and density. The study showed also decreasing of bird species richness with
Altitude, while raptors richness were increased with Altitude.The dominat species were
Coal tit Parus ater, wren Troglodytes troglodytes ,whereas species like Chaffinch Fringilla
coelebs, chiffchaff Phylloscopus collybita were the most abundant.
Estimation of tree and stand volume is a key calculation for productive forest
management (de Miguel et al., 2012). A precise estimation of tree volume needs to take the
variation in bole forms into account while calculation, this can be done by es
timating tree
form factor.
This study aims to construct a mathematical model to calculate the form factor of
brutia pine trees grown in the regions of Rabiaa in northern Latakia. The form factor model
can help foresters to precisely estimate the volume of tree and forest stands.
During the period 2008-2011, 72 pine trees of various ages and sizes, located in
natural stands of different densities and site qualities, were felled.
Diameters at different heights of the felled trees were measured; trees volumes and
volumes of equivalent cylinders were calculated, and consequently the values of tree form
factor were computed. The dataset was randomly split into two parts, 75% (55 trees) of the
data for constructing form factor model and 25% (17 trees) for model validation.
A form factor model was obtained using the non-linear regression equations in the
statistical program SPSS. Value of the coefficient of determination adjusted (R²adj) was
about 0.81. The model has been validated using several statistical methods, the relative
bias ( e%) was ca. 17.9%, while the value of model accuracy ) % x m ) was 22.9 %. In
order to obtain lower value of model relative bias and higher value of accuracy it’s
recommended to use a larger database comprising all distribution areas of pine in Syria.
This research aimed to investigate the competitive situation and the growth
reduction as a result of competition for brutia pine trees grown in
Kafardabeel stand – Jableh. In the year 2015, 15 circle plots (with area size
of 400 m²) in the study a
rea planted in 1974 were sampled; all variations in
the site like tree density, aspect, slop, topography and site fertility were
covered. In the sample plot diameter at breast height of all trees and also
coordinates of central tree and coordinates of all compotators as well as
were measured. In order to study the competitive situation, two different
types of competition indices: position dependent (Heygi1, Heygi2, BAL) and
position independent (CCF) indices were used.
This study aimed to estimate the height of the Pinus brutia trees in Kafardabeel
forested area- Jableh. Eight mathematical forms (Michailoff, Prodan, Petterson, Parabel,
Korsun, Logarithmic, Freese, Chapman-Richards) were used.
In 2015, the diamet
er of 330 trees at breast height (dbh) were measured, and only
heights of 165 of them were taken. Measurements were carried out in 15 sample plots all
over the study area to cover site variations in altitude, exhibition, gradient and density.
Data were split into two parts: 116 tree (70%) were used for model constrction, while the
remaining trees 49 tree (30%) were used for model validation.
The Results showed that, Parabel had the highest value for the Coefficient of
Determination (R²=0.53) and the lowest value of the relative accuracy (mx%) (17.665%).
That means it was the the best model to calculate tree height using diameter at breast
height. This model can help foresters in forest management planning for study area and
similar sites.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
