Investigating root development depth of wheat under saline conditions

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

Arash Tafteh ¹ , Niazali Ebrahimipak ² , Mohammad Reza Emdad ³

1 - Assistant Professor, Department of Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran.
2 - Associate Professor , Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research and Education Organization, Karaj, Iran.
3 - Associated Professor, Department of Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran.

Received: 2021-09-10 Accepted : 2021-11-05 Published : 2021-10-23

Keywords: Salinity, Modeling, wheat, Root depth,

Abstract :

In the study , irrigation efficiency and its main equation, the depth of root development has been considered as an important and indisputable factor. Therefore, determining the exact depth of root development at different stages of plant growth is importance. In this research, by digging profiles directly, the depth of wheat root changes in Hamidiyeh, Kowsar, Atabiyeh, Yasmin Ferdows, Daryoun, Weiss, Shadegan and Hindijan regions with soils with different salinities of 7.3, 23.1, 12.8, 12.7, 4.9, 24, 10.7, 14.22 dS / m respectively, were measured at a depth of 0 to 60 cm. Also, water salinity in each of the above pilots was 1.8, 1.9, 2.5, 2.2, 1.7, 2.4, 6.4 and 3.2 dS / m, respectively. The predominant soil texture of these areas is Clay Loam and Silty Clay Loam, respectively. As the results show, the texture of these pilots is heavy and the results of this research can be generalized in the same range of soil texture. In this regard, the Borg-Grimes (1986) root development depth model was evaluated based on FAO information and indigenous information obtained from the region. The results show that FAO data cause a large error of about 176% and the use of indigenous relationships in different soil salinity classes shows that using these equations with an average error of 18% can be a more appropriate estimate of Root depth various in these areas.

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