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Effects of irrigation with saline water on seedlings growth of forest species and their soil characteristics

M.Majidain, S.M. Hojati, M.R. Pourmajidian, H. Jalilvand

Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Iran

Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Iran

Key words: Irrigation, saline water, Caspian Sea, seedling.

Abstract

Valley-Irrigation-VRI-1According to the limited amount of fresh water resources in the country, identifying and evaluating the effects of irrigation with saline water is necessary to produce tree seedlings for reviving the destructed lands, agroforestry and forest enrichment. One of the sources of providing saline water in north of the country is Caspian Sea. Seedlings of six species including alder, oak, eucalyptus, hackberry, Cupressus sempervirens and Cupressus arizonica were used. This study was done in a completely randomized design with four replications for each species and each irrigation. The parameters of diameter and height of the seedlings were measured at the beginning of the study period (March 2013, before stress application). After the treatments application, these parameters were monthly measured. Soil samples were taken at the beginning (March 2013) and end (October 2013) of the period. Based on the results, the highest and lowest diameter growth of saline water treatment was observed for Cupressus sempervirens and alder, respectively. The highest and lowest height growth of saline water treatment was observed for Cupressus sempervirens and oak, respectively. The highest and lowest soil electrical conductivity of saline water treatment was observed for alder and Cupressus sempervirens, respectively. The result of this study showed that irrigation with saline water had influence on diameter and height growth as well as soil characteristics and conifers had shown higher resistance than hardwoods. Therefore, it is suggested to examine the effect of irrigation with saline water on other conifers and native species in further studies.

Get the original articles: http://www.innspub.net/volume-6-number-4-february-2015-ijb/

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