Effect of saline irrigation water on some soil properties and salt tolerance of new wheat genotypes
Abstract: Greenhouse experiments were conducted during two successive seasons to evaluate the tolerance of new wheat genotypes (Triticum aestivum L.) and the effect of saline irrigation water on soil salinity. It comprised five new wheat genotypes (Geno.) with check variety, Seds 1 grown to maturity in clay loam soil. Four levels of salinity in irrigation water (ECw) : 3000, 6000, 9000 and 12000 mg/l and tap water as control. Soil properties were determined and wheat yield and yield components were recorded and statistically analyzed.
The results revealed that the increase in ECe of the studied soil to 5.2,15.4, 20.2 and 25.8 dSm-1 was almost proportional to the ECw of 3000, 6000, 9000 and 12000 mg/l, respectively compared with control ECe of 2.8 dSm-1. Sodium adsorption ratio (SAR) and ESP were increased as a result of Na accumulation in the soils.
Wheat growth, grain yield and yield components were significantly decreased with increasing ECw. Grain yield was particularly sensitive being reduced by 3.41, 19.59, 33.46, and 40.03% over the control for irrigation water salinity (ECw) of 3000, 6000, 9000 and 12000 mg/l, respectively. However, the effect of control and the irrigation with saline water having 3000 mg kg–1 treatment on grain yield was not significant. The corresponding reduction in biological yield (straw+ spikes weight) was 7.57, 18.36, 27.97 and 34.65% for the same salinity treatments, respectively. According to slope technique of the exponential regression equation, the reduction was markedly less for biological than for grain yield and the grain: biological ratio was 1: 0.79. The yield components were varied within salinity treatments and had the same trend.
On average salinity, wheat genotypes differed significantly and Geno. No 1, 2 and 4 significantly produced higher grain yield and spikes weight compared with the other genotypes. With respect to plant height, Geno. NO 4, 5 and Seds1 were the tallest but Geno. 3 was the shortest genotype. Again, there were no significance differences between the three Geno. No 1, 2 and 4 except for 100 grains weight and plant height. The yield components were varied within wheat genotypes, indicating that Geno. 1 and 3 produced the higher spikes number per pot and geno. 5 had the highest 100 grains weight. According to quantitative approach, the genotype 2 proved to be the most tolerant while genotype 3 and Seds 1 were sensitive to salinity in the alluvial soil. Would draw attention to the possibility that highly productive genotype may be more sensitive to salinity like Geno. 4. The genotype 2, therefore could be described as acquiring both properties of high production and salt tolerance. The use of saline water ECw 6000 mg/l or more can not be sustained in irrigation. But saline water ECw3000 mg /l can be sustained under the study conditions
Publication year 2005
Pages 106-112
Availability location Soils, Water and Environment Research Institute, ARC
Availability number
Organization Name
Country Egypt
City Alexandria
Publisher Name: Prof.Dr. A.M. Balba, Soc. For Soil & Water Research
serial title Alexandria Science Exchange
ISSN 1110-0176
Volume 26 . 2
Department Soil Salinity and Alkalinity Res. Lab.
Author(s) from ARC
Agris Categories Soil erosion, conservation and reclamation
AGROVOC
TERMS		 Salt tolerance.
Proposed Agrovoc Saline Irrigation Water;Soil Properties;wheat genotypes;
Publication Type Journal
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