Preprint Article Version 1 NOT YET PEER-REVIEWED

Determination of Wheat Growth, Crop Coefficient (KC) and Water Stress Coefficient (Ks) under Different Salinity

  1. Water Engineering Department, Kashmar Higher Education Istitute, Kashmar, Iran
Version 1 : Received: 16 November 2016 / Approved: 17 November 2016 / Online: 17 November 2016 (10:55:59 CET)

How to cite: Abedinpour, M. Determination of Wheat Growth, Crop Coefficient (KC) and Water Stress Coefficient (Ks) under Different Salinity. Preprints 2016, 2016110091 (doi: 10.20944/preprints201611.0091.v1). Abedinpour, M. Determination of Wheat Growth, Crop Coefficient (KC) and Water Stress Coefficient (Ks) under Different Salinity. Preprints 2016, 2016110091 (doi: 10.20944/preprints201611.0091.v1).

Abstract

A field experiment was conducted for determination of crop coefficient (KC) and water stress coefficient (Ks) for wheat crop under different salinity levels, during 2015-16. Complete randomized block design of five treatments were considered, i.e., 0.51 dS/m (fresh water) as a control treatment and other four saline water treatments (4, 6, 8 and 10 dS/m), for S1, S2, S3 and S4 with three replications. The results revealed that the water consumed by plants during the different crop growth stages follows the order of FW>S1>S2>S3>S4 salinity levels. According to the obtained results, the calculated values of crop coefficients significantly differed from those suggested by FAO No.56 for the crops. The Ks values clearly differ from one stage to another because the salt stress causes both osmotic stress, due to a decrease in the soil water potential, and ionic stress which the average values of water stress coefficient (Ks) follows this order; FW(1.0)=S1(1.0)>S2(1.0)>S3(0.93)>S4(0.82). Overall, it was found the differences are attributed primarily to specific cultivar, the changes in local climatic conditions and seasonal differences in crop growth patterns. Thus, further studies are essential to determine the crop coefficient values under different variables, to make the best management practice (BMP) in agriculture.

Subject Areas

crop coefficient; evapotranspiration; salinity; wheat crop

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