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Register a new user"Studing the growth and productivity of planted Pinus pinea L. in DAHER AL SORANI forest site in Tartous (Syria)
دراسة نمو و إنتاجية الصنوبر الثمري Pinus pinea L. المزروع في موقع تحريج ضهر الصوراني في محافظة طرطوس (سورية)
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تم في هذا البحث تقييم نمو و إنتاجية الصنوبر الثمري Pinus pinea L. المزروع في مجموعات حرجية نقية في موقع تحريج ضهر الصوراني على بعد 50 كم شمال شرق مدينة طرطوس ضمن الطابق البيومناخي الرطب المعتدل. أظهرت النتائج عدم تساوي المجموعات الحرجية المزروعة بمؤشرات نموها بسبب تأثيرعدة عوامل أهمها ظروف الموقع, و الكثافة الشجرية و...الخ. و على الرغم من الإستدقاق متوسط القيمة لجذوع الأشجار (معامل الشكل F تراوح ما بين 0.563 - 0.467) إلا أن ذلك لم ينعكس على المخزون الخشبي الذي بلغ متوسطه 116.337 م3/هـ و بمدى تراوح ما بين (215.3635 - 51.6519 م3/هـ), كما لم ينعكس على معدل النمو السنوي الذي بلغ متوسطه 4.4548 م3/هـ/سنة و بمدى تراوح ما بين (7.9764 - 1.9866 م3/هـ/سنة) عند كثافة متوسطة للموقع بلغت851 شجرة/هـ و بمدى تراوح ما بين ( 1975 – 350شجرة/هـ) عند أعمار ما بين27 - 25 سنة للأشجار المزروعة. كما بينت الدراسة الإستقامة العالية للساق و التفرع القاعدي القليل لأشجار الصنوبر الثمري المزروعة.
This research aimed to evaluate the growth and productivity of planted Pinus pinea in pure stands at "DAHR AL SORANI" forest site. The site is about 50 km north east of Tartous city, which is located in Temperate-Humid Bioclimate Zone. Results showed that the stands were not equivalent in growth indicators; this was due to many factors affecting growth like site characteristics and trees density…etc. In spite of the mediocre values of form factor, the volume and mean of annual increment was not influenced. Results revealed that the mean values of tree density was 851 trees/ha and ranged between 350 - 1975 trees/ha, woody volume was averaged at 116.337 m3/ha and ranged between 51.6519 - 215.3635 m3/ha; annual increment had also an average of 4.4548 m3/ha/year and ranged between 1.9866 - 7.9764 m3/ha/year. The study showed a high straightness of pine. Pinus pinea trees had very rarely forked boles.
References used
ANNESI , T. ; CURCIO, G. ; D’AMICO , L. ; MOTTA, E . Biological control of Heterobasidion annosum on Pinus pinea by Phlebiopsis gigantean . For. Path., Berlin , 35 , 2005 , 127–134
CALAMA , R . ; CANADAS , N. ; MONTERO ,G . Inter- regional variability in site index models for seven-aged stands of stone pine(Pinus pinea L.) in Spain .Annals of Forest Science , France , 60 , 2003 , 259–269
GHARACHORLOU, A. ; KIADALIRI , H. ; ADELI , E. ; Alijanpoor , A. Studying Quantity and Quality of Coniferous Species in Arasbaran Forests (Case Study: Heresar and Kalaleh Regions). World Applied Sciences ,U.S.A. , 8 (3), 2010, 334- 338
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The site was planted between 1960-1962 year with area size of 33 ha. The plots were
systematically sampled with area size of 400 m2. The distance between plots was 100 m.
Results showed that: trees number per hectare (N), stand average diameter (db
h) and
height (H), basal area (G), productivity (V) and average annual growth (A.A.G) were: 237
tree/ha, 34.68 cm, 12 m, 21.91 m2/ha, 137.51 m3/ha and 2.64 m3/ha/year ; respectively.
Stand height curve was developed with coefficient of determination of R2=0.50.
The study was achieved in 2014-2015 at Dahr Khribat stone pine forest, Latakia. to
determine the factors affecting the natural regeneration of the stand. The results of climate
studies indicated that the region is located in the semi-wet climate fl
oor with a mild winter
as the average of rainfall thermal coefficient reached (Q2 = 72.01). The study showed that
the low productivity of cones (20 kg con / tree) was one of the limiting factors of natural
regeneration. The trees high density (462 tree / ha), led to a decrease in tree diameter at
breast level (30 cm) and low coronary size (320.2 m3).
Seed germination was not affected by illumination periods, while salinity levels led
to a significant decrease in germination from 90% at control to 19% at 0.5 mol / l.
All of one year old sapling or seedling were dead during summer months, while more
than 90% of two years old cultivated sapling, survived in all treatments, but no significant
differences among them.
This study was carried out at three different forest sites in Syria in order to
determine the effect of changing rainfall, temperature and soil on kernel
productivity of stone pine (Pinus pinea L.)> these sites included: Jabal Alnabi
Mata, (Tartou
s province, L1), Dahr Alkhoser (Homs province, L2) and E′en
Jron site (Idleb province, L3). Results showed that kernel productivity of stone
pine per tree was 236.3, 252.8, 143 g per tree, and 177, 162.3, and 86.98 kg per
hectare in L1, L2, and L3, respectively. These differences were attributed due
to the variation in the composition, textured and fertility of the soil available in
the three locations studied. It was concluded that trees of stone pine grow better
and superior in Kernel productivity in humid and super-humid bioclimatic
zone.
يحتل الصنوبر الثمري أهمية كبيرة في مجال التشجير الحراجي الإنتاجي والقائي في سورية ورغم هذه الاهمية فإن عدد الدراسات المتعلقة بهذا النوع في سورية يعد قليلا مقارنة بالأنواع الأخرى
Seeds of Pinus pinea L .were collected from AL Kusaibia site near Aleppo
(altitude ٢٩٥m) and from AL Bustan site near Mesiaf (altitude ٨٠٠m). which
have different ecological conditions in order to recommend the best optimal
treatment for breaking
the coat dormancy stage of seeds pre-sowing in both
sites. Six different methods of treatment suchas, mechanical treatment,
treatment with boiling water, treatment with light sucher acid (H٢SO٤) for ١٥,
٣٠, ٤٥ minutes, and with normal water for ٢٤ hours. were applied to break the
coat dormancy of ٦٠٠ seeds in each sites.
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