Search published articles

Showing 3 results for Survival

Babk Pilehvar, Sayed Vahid Sayedena, Javad Soosani, Hamzeh Jafari Sarabi,
Volume 1, Issue 2 (3-2015)

Assessment of the plantation is fundamental for managers to improve plantation quality and successful plantation in the future. This study aimed to assess and compares Makhmalkooh forest park plantation data due to 18 years old period. Sampling was performed in a randomized systematic design using 60 circular plots in a 50*150 m rectangular grid. Diameter at breast height, basal area, tree height and crown canopy were measured for each species in all plots, and then total volume and mean of growth increment based on age were computed. Results showed that Cupressus arizonica and Amygdalus scoparia had the highest value in density, heterogeneity in species composition, and crown canopy and Capressus sempervirens and Olea europea had the least one. The survival rate for all species were 78.5 percent and different plantation types showed significant difference in diameter, basal area, crown canopy and total volume. The most value in mean of diameter and height increment was assigned to Pinus brutia and Cupressus sempervirens and the least value were assigned to Olea europea and Amygdalus scoparia. The results showed that Cupressus arizonica and Pinus brutia are the best species for afforestation in this region.
Mehdi Heydari, Ali Mahdavi, Elham Jaferyan, Vahid Mirzaeizadeh,
Volume 2, Issue 2 (3-2016)

Judas tree belongs to valuable species in Zagros forests. Nowadays, due to the special beauty of this species, it has received substantial attention in afforestation. In this regard, the improvement of seed germination is a suitable way to improve the quantity and quality of producing seedlings in nurseries and the establishment of forest plantation. In this study, the seed germination characteristics and seedling survival of Cercis griffithii in different soil treatments have been surveyed in the nursery of Aivan County in Ilam province. The experiment was set up as a randomized complete design with four treatments each contained 120 pots. Three seeds in plastic pots were sown in nursery soil (Control Control soil- cattle manure (5:1), Control soil- Litter (5:1) and Control soil- Cattle manure- Litter (5:1:1). According to the one-way ANOVA results, significant differences were observed between soil treatments in terms of germination rate, maximum, mean daily germination and germination energy, while there were no significant differences in other germination characteristics between soil treatments. The highest germination rate, maximum, mean daily germination and germination energy were observed in the treatment of Control soil- Cattle manure- Litter. In terms of time, seedling survival decreased from September to March. The results showed that there is a significant correlation between mean daily germination and different soil composition. In general, it can be concluded that germination and survival of Cercis griffithii can be improved using organic compounds in the nursery.

Morteza Rooki , Masoud Tabari Kouchaksaraei , Seyed Ehsan Sadati ,
Volume 3, Issue 2 (3-2017)

Background and objectives: Mediterranean Cypress (Cupressus sempervirens var. fastigiata) is a native, evergreen species. Due to its various merits, particularly its wide use in parks and urban green spaces, it is of interest in most climatic regions of Iran, including Zagros provinces. Due to the poverty of soil and limitation in water sources, the production of seedlings of this species has become particularly problematic in some of these regions. By using rhizobacteria Pseudomonas fluorescens inoculation in soil, for the first time, the present study aims to determine the resistance and variations of growth characteristics of seedlings under water deficit conditions.Materials and methods: The experiment was conducted as a factorial, using a completely randomized design with two treatments (i.e., with rhizobacteria and without rhizobacteria), different watering levels (3, 6, 9 and 12 days) in three replicates. After 5 months, growth characteristics of seedlings were measured.Results: Increasing the watering period (water deficit) caused to significantly decrease the survival, diameter, shoot biomass and total biomass, so that all seedlings were died under 12-day watering level. In watering period of 9 days, survival was reduced to 49.83 percent. There was no significant difference in collar diameter, root length, root volume and root/shoot biomass with water deficit intensity. However, the survival rate, height growth, shoot biomass, root biomass, total biomass and seedling quality index were greater in seedlings inoculated with rhizobacteria, compared with those of non-inoculated seedlings.Conclusion: The seedlings of Mediterranean Cypress inoculated with Pseudomonas fluorescens rhizobacteria are able to tolerate the water deficit stress and increase their growth performance; however, under optimal conditions, the rhizobacteria inoculation has no positive effect on survival rate of the seedlings.

Page 1 from 1     

© 2024 CC BY-NC 4.0 | Journal of Forest Ecosystems Researches

Designed & Developed by : Yektaweb