Author/Authors :
Nikravesh، Iman نويسنده Shahid Chamran University of Ahvaz , , Boroomandsab، Saeed نويسنده Shahid Chamran University of Ahvaz , , Moazed، Hadi نويسنده Shahid Chamran University of Ahvaz , , Naseri، Abd-Ali نويسنده Shahid Chamran University of Ahvaz , , Mansouri، Maryam Jalili-Shah نويسنده Shahid Chamran University of Ahvaz ,
Abstract :
Irrigation water quality affects soil physical and hydraulic properties. The present paper aims to investigate the effect of different salinity treatments in the presence of constant turbidity on the final infiltration rate of soil, saturated hydraulic conductivity, and total porosity of the soil. The salinity treatments were applied at five levels (S1=1,S2=2,S3=4, S4= 6, and S5=8 deci-Siemen/meter) with constant turbidity (T=200NTU). The treatments were examined at three different soil depths (0 to 15, 15 to 30 and 30 to 45 cm) with silt loam texture and three replications in a randomized complete block design. The final infiltration rate, saturated hydraulic conductivity, and total porosity of the soil were made respectively by Green-Ampt, constant head, and gravimetric methods. The results were analyzed in SPSS. Findings revealed that, compared to TS1 treatment, the soil final infiltration rate of TS2, TS3, TS4, and TS5 treatments respectively decreased 3, 11, 28.5, and 39percentages. Compared to TS1 treatment, the saturated hydraulic conductivity of TS2, TS3, TS4, and TS5 treatments respectively decreased 26, 41, 45, and 54 percentages. Comparison of saturated hydraulic conductivity of soil at various depths showed the increase of 47.5% and 55% respectively in the second and third depths than first depth. Compared to TS1 treatment, the soil total porosity of TS2, TS3, TS4, and TS5 treatments respectively decreased 2, 4, 4.4, and 6.5 percentages. Comparison of total porosity of the soil at various depths showed the increase of 2% and 5% respectively in the second and third depths than first depth.
