Investigation of survival, growth and physiology of six afforested species under ‎different ‎irrigation regimes

Document Type : Scientific article

Authors

1 Ph.D student of Forestry, Faculty of Natural Resources, Gilan University, Gilan, I.R. Iran. ‎

2 Professor, Forestry Department, Faculty of Natural Resources, Tarbiat Modarres University, Mazandaran, I.R. Iran. ‎

3 Ph.D of Forestry, Faculty of Natural Resources, Tarbiat Modarres University, Mazandaran, I.R. Iran. ‎

4 Associate Professor, Forestry Department, Faculty of Natural Resources, Guilan University, Gilan, I.R. Iran. ‎

Abstract

In this research, morphological, physiological and biochemical of 6 tree species in industrial Foolad Mobarakeh of Isfahan region at different irrigation intervals (seven, 14, 21 and 28 days) were studied in a completely randomized design and factorial in 2019. Survival, height, diameter, crown characteristics, photosynthesis, transpiration, stomatal conductance, water use efficiency, proline, and whole leaf chlorophyll were evaluated. The results of comparing the means showed that with the prolongation of irrigation cycles from once every seven days to once every 28 days, the survival rate of species and morphological traits such as height, diameter, and crown of the species decreased. Physiological and biochemical characteristics under the influence of species did not differ statistically significantly, while increasing the irrigation period from seven days to 28 days showed dramatic changes in these characteristics. Photosynthesis, stomatal conductance, transpiration, water use efficiency and total leaf chlorophyll were highest in irrigation cycle once every seven days and minimum once every 28 days, while leaf proline content had the opposite trend so that the lowest amount in the irrigation cycle once every seven days and its maximum amount was observed in the irrigation cycle once in 28 days. There was no difference between species in terms of physiological parameters. Generally, the results showed that the species Caucasian nettle tree, chinaberry and black locust have good performance in irrigation periods. Although it has been determined that the best irrigation treatment is once every 7 days, but 14 and 21 days also have high survival rate and can be used to reduce water consumption‎.

Keywords

References

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Forest Research and Development
Volume 8, Issue 1
May 2022
Pages 97-111

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