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Abstract: A pot experiment was carried out in a green house at the Research and Experiments Station of the

By Loutfy I. El-juhany, I. M. Aref and A. I. M. Ahmed


irrigated with saline water by adding sodium chloride to tap water. Four treatments represented four gradual levels of salinity were applied as a control and low, medium and high saline water represented by sodium 1 + chloride solutions with EC =1, 4, 8 and 16 dsm, respectively. Increasing Na concentrations in irrigation water decreased the diameter, height, root length, number of leaves, average leaf size and total leaf area of the seedlings. These resulted in decreases in Leaf, stem, roots and consequently total plant dry weight indicating a reverse trend between these traits and salinity levels. Increasing salinity decreased LWR and increased SWR, while RWR did not change. RGR, LWR, SLA and LAR of Eucalyptus species all decreased with increasing the concentration of sodium chloride in irrigation water, while NAR was not affected. Relative water content of the leaves decreased with increasing salinity. Concentrations of Na, K, Cl and Na: k ratio increased with increasing salinity. Key words: Eucalyptus camaldulensis Eucalyptus intertexta Eucalyptus microtheca Salinity Growt

Year: 2014
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