|Author:||El-Haddad, E. H. ; Aboushal, A. A. ; Mohamed, M. E.|
|Book Group Author:||NA|
A greenhouse experiment was conducted to study soil salinity changes, wheat growth, and water use as affected by different salinity levels (ECi) and leaching fractions (LF). Eighteen large columns (20 cm in diameter and 120 cm depth) were packed with sandy clay loam soil and were planted with wheat (Triticum aestivum var. Sakha 69). Three salinity levels having electrical conductivity values of 4, 6, and 8 dS/m were used in this study with an amount to provide two leaching fractions (0.20 and 0.30). After each irrigation, the drainage water from each column was collected and its volume and electrical conductivity were measured. Salt balance was performed by comparing the total amount of salts drained into the drainage water and the total amount of salts contributed by irrigation water during the experiment. At the time of maturity, wheat plants were harvested and soil samples were taken at different depths for analyses. The results indicated that soil salinity (ECe) and sodium adsorption ratio (SARe) were increased as ECi increased or LF decreased. The salt balance data indicated that salt accumulation (salt input-salt output) increased by 67.20% as ECi increased from 4 to 8 dS/m, while increasing LF from 0.20 to 0.30 decreased salt accumulation by 9.9%. The results also indicated that 67.9 and 54.3% of the salts added during the experimental period were stored by the soil for 0.20 and 0.30 LF, respectively, regardless of salinity levels. Grain yield of wheat were not affected neither by ECi nor by LF treatments. Although, water use was decreased significantly by 21% as ECi increased from 4 to 8 dS/m, it was not influenced by LF. Straw yield, the vegetative vigour parameter and water use-efficiency were decreased significantly only at 8 dS/m, while they did not vary due to LF variations. Water use-efficiency for 0.20 LF was significantly higher compared with that of 0.30 LF, indicating that the same grain yield of wheat can be produced with lower amount of water.
|Pages:||1 - 14|
|Journal:||Egyptian Journal of Soil Science|
clay loam soils, crop yield, electrical conductivity,growth, irrigation water, leaching, plant water relations, saline water,soil salinity, soil types, water use efficiency, wheat, Triticum,Triticum aestivum, Triticum, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, salt water, Field Crops(FF005) (New March 2000), Plant Water Relations (FF062), PlantProduction (FF100), Soil Chemistry and Mineralogy (JJ200), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]