Detection of fungi on (seeds; seedlings root's and soils) of cypressand pinespecies (brutia; canary and stone) in forest nursery

In this study a total of /14/ fungal genera have been isolated from seeds; seedlings roots and soilsofCypress and Pine species (brutia; canary and stone) samples brought from Hinnade's nursery, and it were: Alternaria; Rhizoctoni; Fusarium; Chaetomium; Mucor; Phythophtora; Rhizopus; Aspergillus; Penicillium; Cladosporium; Saccharomyces; Sordaria; Pytiumand Trichoderma. The first 12 genera were isolated from seeds. Alternaria andFusarium appeared on alldifferent types of plants with the highest frequency of the first genus 23.3% and 36.6% of the second one on cypress. The first 5 genera were isolated from seedlings roots in addition to genus Pythium. And also the Genus Fusariumwas frequented on all study types with high frequencies reached to 58.5%onbrutia.The genusRhizoctoniawas not isolated from seeds and roots of Cypress while it was isolated from seeds and roots of all species of pine./7/ fungal genera were isolated from seedlings soils three of it (Alternaria,Aspergillus,Fusarium) were isolated from the soils of all species of plants with the highest percentages of the first 68.97% on cypress's soil and 22.22% of the second from stone pine and 35.13%of the genusFusarium from brutia. The highest frequency was for genus Fusarium 35.13% on brutia. The genusPythium was onlyisolated from the seeds and soils of brutia pine.

Some factors affecting the natural generation of Pinus pinea L. stand in Dahr Kheribat site - Lattakia

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 floor 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.