This study was carried out during 2013 – 2015 and aimed to assess the effects of
applying dry sewage sludge on dry biomass production and wood volume of Eucalyptus
camaldulensis plantation established on sandy soil in Fedio plantation-Lattakia at A
pril -
2013.
Four experimental treatments were compared at age 22 months: SS1 (sewage sludge
3 kg/tree), SS2 (sewage sludge 6 kg/tree), MF (mineral fertilizer), and C (no fertilizer
applications). Aboveground dry biomass production and wood volume in the SS1
treatment were about 107.60 t/ ha and 121.13 m3/harespectively, MF treatment (87.52 t/ha,
96.98 m3/ha) and SS2 treatment (91.12 t/ha, 103.42 m3/ha)and higher than in the control
treatment (43.89 t/ha, 51.32 m3/ha ).
Generally, sewage sludge is dumped into sanitary landfills, even
though its use in forest stands as a fertilizer and soil conditioner
might be an interesting option. However, sewage sludge must be
applied with care to avoid soil and water pollutio
n. The aim of this
study was to assess the effects of applying dry sewage sludge on
wet biomass production and wood volume of short rotation
Eucalyptus camaldulensis plantation established on sandy soil in
Fedio plantation.
This study aims to recognize some growth characteristics of
Eucalyptus camaldulensis and the effect of climate factors on trees
growth and development. Negative trends were detected in annual
rainfall according to meterological data taken from Homs station.
In this research, the occurrence of Glycaspis brimblecombei Moore (Hemiptera:
Psylloidea: Aphalaridae) was recorded for the first time on Eucalyptus camaldulensis
(Myrtaceae) leaves in Syria. Where collected from the leaves and shoots of young and
old
trees of eucalyptus from Lattakia province in June 2015 in three sites. The morphological
characters examined and compared with the specialized keys for this species. The results
showed that the highest average for psyllid egg masses was in Bustan AlBasha on the
lower surface of the leaves and amounted to 5.80±2.00 mass, had the highest average
number of eggs in the same location and on the lower surface also reached 65.80±47.97
eggs / Leaf. The highest average number of nymphs under the Lerp in Bustan AlBasha on
the lower surface of the leaves as stage as follows: L1: 18.4±9.51, and L2: 9.60±3.32, and
L3: 6.40±0.92, while L4: 2.80±1.74 on the upper and lower surfaces. The highest average
number of psyllid nymphs without white Lerp was for the first nymph L1: In Shahd
Alaasal site on the Lower surface 3.40±0.87, and L2: at the same previous location on the
upper surface of 5.80±2.43, and L3: in Bustan AlBasha site on the Lower surface
2.80±0.58, and L4: in Shahd Alaasal and Bustan AlBasha 0.20±0.20 on the upper and
lower surface. The highest average number of adult in the site Bustan AlBasha on the
upper surface of 1.40±1.16, and the lowest in the site Shahd Alaasal on the upper surface
of 0.20±0.20.
This study aims to compare the ability of three plant species (Eucaleptus camaldulensis L., Acacia cyanophylla L. and Ricinus communis L.) on the accumulation of cadmium (Cd) resulting from the different existing pollution sources in the study area (
Abdul Qader Al Husseini Street - Latakia) especially resulting from traffic. The samples were collected from different parts (leaves, wood, bark) of the species mentioned in addition to samples of the soil, then the samples were processed and analyzed by atomic absorption spectrophotometer.
The results showed a difference in the content of cadmium in the studied species, ranged between (0.25 mg/kg) and (0.42 mg/kg) dry weight, where the highest content in Ricinus wood (0.42 mg/kg) and then Eucalyptus wood (0.4 mg/kg) and minimum content in Acacia wood (0.32mg/kg). Ricinus and Acacia showed high ability to accumulate cadmium reaching Bioconcentration factor (BF=1.33) for Ricinus and (BF=1.13) for Acacia
القدرة التراكمية للأوكاليبتوس المنقاري والعفص الشرقي لبعض العناصر الثقيلة في شارع الشاطئ الاأزرق- مدينة اللاذقية