Study of salinity distribution in cultivated soil profile under drip irrigation

Subject Areas : Farm water management with the aim of improving irrigation management indicators

leila mirzaeialamuti ¹ ( Msc student in irrigation and drainage engineering - Imam Khomeini International University )
Bijan Nazari ² ( assistant professor of water engineering department, international university of imam Khomeini )
Abbas Sotoodehnia ³ ( Associate professor of water engineering department, Imam Khomeini International University )
Hadi Ramezani Etedali ⁴ ( Associate professor of water engineering department, Imam Khomeini International University )

Received: 2020-02-15 Accepted : 2021-02-16 Published : 2021-02-19

Keywords: Water consumption, drip irrigation, Salinity, crop yield, Forage Maize,

Abstract :

Conservation of soil and water resources in arid and semi-arid countries is a serious concern for salinity. The present study was carried out in a completely randomized block design to investigate soil salt accumulation in tape irrigation. Treatments included: “surface plaque tape”, “semi-subsurface plaque tape in 10 cm depth of soil”, “surface tape”, “semi-subsurface tape in 10 cm depth of soil” and “surface tape with mulch”. Salinity of irrigation water was 2 dS/m with Forage Maize cultivation. The results of salinity analysis indicate that salt distribution in 15-20 cm depth soil and in 10-15 cm space from dripper had highest value. Also in confidence level of 95 %, in all of treatment in 0, 15 and 30 cm space of dripper and 0-20 cm depth of soil level there were different in salt but in another depth (20-40 and 40-60 cm) there weren’t any different also, in use of drip tape irrigation system in soil texture silt-loam discrete kind of tape and location of installation, mainly salt distribution happen between 0-15 cm space of dripper and 0-20 cm depth of soil level and we have to do leaching. In this research, surface tape with mulch treatment had the highest yield and lowest water use between studied treatments. This treatment reduced the amount of salt accumulation by 10.39% on average compared to other treatments.

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