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ARPN Journal of Science and Technology >> Volume 7, Issue 2, November 2017

ARPN Journal of Science and Technology


Effect of Different Dilutions of Sea Water on Germination and Seedling Performance of Some Acacia Tree Species

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Author Nasreldin Adam Ali ,Salaheldin Goda Hussein
ISSN 2225-7217
On Pages 1203-1207
Volume No. 3
Issue No. 12
Issue Date January 01, 2014
Publishing Date January 01, 2014
Keywords Red Sea water, EC, Acacia species, salinity tolerance.



Abstract

An experiment was conducted in the Faculty of forestry nursery at Shambat campus (University of Khartoum) in plastic containers during the period February- June 2008 to determine the salinity tolerance of the: Acacia mellifera, Acacia nubica, Acacia seyal, Acacia Senegal, Acacia tortilis. Authenticated seeds were obtained from Tree Seed Centre - Agricultural Research Corporation at Soba,Sudan. Sea water was transported from Port Sudan and mixed in calculated quantities with tap water to prepare the following concentrations: 5 dSm-1,10 dSm-1, 15 dSm-1, 20 dSm-1 plus pure tap water (0.4 dSm-1). Soil was Red loamy sand from western Omdurman (El Rawkeep).Initially 50 seeds were sown in each pot then thinned to 10 seeds in the first 5 weeks and watered by tap water every other day. Thereafter, tap water plus sea water was used as per the calculated concentration according to field capacity. The irrigation amount for each plot was One liter plus 25 milliliters as leaching requirement. The following measurements were recorded: germination and survival percent shoot length, root length. Measurements were taken 3 times in the first week, twice in the second week and once in the third and 4th week, then once every two weeks followed by once every three weeks. The final measurements were taken after a month from the last measurements i.e after 18 weeks from seeding. Statistical analysis was done according to SAS program & Duncanís multiple range tests. The results showed that all seeds of the tested species germinated in concentrations of 0.4 dsm-1, 5 dsm-1 ,10 dsm-1. But no germination was obtained at 15 dsm-1,20 dsm-1. The results further showed that there were significant differences at P=0.05 between 10 dsm-1, 15 dsm-1 and 0.4 dsm-1, . Significant differences were found between 10 dsm-1, 15 dsm-1 . Significant differences were found between 10 dsm-1, 15 dsm-1, and 20 dsm-1 for all measurements. The results indicated that the most salinity tolerant species were Acacia mellifera and Acacia tortilis followed by Acacia senegal while. Acacia nubica and Acacia seyal were weekly tolerant. The ere fore Acacia mellifera and Acacia tortilis are recommended. For afforestation-reforestation in saline sites and for utilizing sea water: rain water- mixture in the area. It is further recommended that field trials be conducted for evaluating the performance of these species in the field.


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