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Register a new userDetermination of Suitable Treatments for Braking the Coat Dormancy Stage of Pinus Pinea L. Seeds, Collected from Different Ecological Sites in Syria
كسر طور السكون الغلافي لبذور الصنوبر الثمري Pinus Pinea L المجموعة من مواقع حراجية . متباينة الظروف البيئية في سورية
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جمعت بذور الصنوبر الثمري Pinus Pinea L من موقعي الكسيبية في محافظة حلب، و البستان الحراجي في منطقة مصياف بمحافظة حماه على ارتفاع ٢٠٠ و ٨٠٠ م عن سطح البحر على التوالي، حيث يتصفان بظروف بيئية مختلفة و ذلك بهدف تحديد المعاملة المثلى لكسر طور السكون الغلافي لهذه البذور قبل زراعتها و ضمان إنباتها بصور متجانسة. عوملت ٦٠٠ بذرة مجموعة من كل موقع بست معاملات مختلفة شملت: المعاملة الميكانيكية، النقع بالماء المغلي، المعاملة بحمض الكبريت التجاري لمدة ٤٥ ،٣٠ ،١٥ دقيقة، و النقع بالماء العادي لمدة ٢٤ ساعة.
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.
References used
أسعد، ريم، نور الدين، علي. ١٩٩٥ . دراسة أولية لإدارة المشاجر الاصطناعية وتنظيمها بهدف تنظيم الرعي وتحديد الحمولة الرعوية (موقع الكسيبية محافظة حلب) قسم الحراج والبيئة كلية الزراعة، جامعة حلب، ٦٠ صفحة
الرفاعي، عبد الله. ١٩٩٥ . البذور والمشاتل الحراجية منشورات جامعة حلب، كلية الزراعة، ٣٠٣ صفحة
رحمة، أديب. ١٩٧٦ . أساسيات علم الحراج (الجزء العلمي). منشورات جامعة حلب، كلية الزراعة ١٠٧ صفحة.
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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.
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 sho
wed 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.
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.
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.
This study was conducted during the period 2014-2016 in the nursery College of
Agriculture, University of Tishreen, this study aimed to calculate the percentage of
germination of the seeds of Laurus nobilis and Pinus pinea using different proportio
ns of
olive cake with a mixture Arboretum, and study some of the planter resulting properties as
well as some physical and chemical characteristics of agricultural mixture that used. were
analyzed using spss statistical program
The mixing nursery soil (sand, soil 1: 1) with olive cake rates (25,50,75,100)% .
assessment: germination percentage, wet and dry weight of shoot and root grouped,
volumetric weight, moisture middle and chemical characteristics. , For germination
percentage it has increased every germination of seeds of laurel and pine fruiting increase
the proportion of bagasse in the agricultural center in general ratio, and on the contrary has
increased wet weight of shoots with decreasing proportion of olive cake in both types
studied. For the physical properties there was a decrease in the volumetric weight of the
agricultural community to increase the proportion of the studied olive cake, as soil
moisture ratio increased to increase the proportion of bagasse. Rich agricultural circles
used container Regarding chemical properties have been observed on the olive cake metal
elements (iron, magnesium and copper), The salinity and acidity remained within normal
limits, so the study has demonstrated the validity of the use of olive cake as a medium for
planting in whole or in part agricultural mixtures used in nurseries.
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