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Information Journal Paper

Title

The Effect of Irrigation with Different Salinity Levels of the Caspian Sea on the Yield of Medicago Sativa and Sanguisorba Minor Species

Pages

  111-131

Abstract

 The limitation of freshwater resources necessitates the full or combined use of unconventional water sources. One of these sources is the available saline water. The aim of this research is to investigate the method of combining Caspian Sea water with freshwater on the performance of Medicago sativa and Sanguisorba minor species. The selection of these species was due to their high production, excellent acceptance by livestock, suitable nutritional value, high seed production, and easy establishment. For this purpose, an experiment was conducted in the form of a split-plot design in complete randomized blocks with three replications and five treatments: freshwater (control) and 10, 20, 30, and 50% ratios of Caspian Sea water cultivation in the field in 2020. Germination indices, shoot and root dry weight, production, relative humidity, sodium, potassium, nitrogen, and protein percentage were investigated. Data were analyzed using variance analysis and MINITAB software version 18, and mean comparisons in Excel software using LSD test were investigated. The results showed that the Alfalfa species had complete Germination up to a Salinity level of 20%, and the Poterium species had a 37. 5% Germination rate up to a Salinity level of 20%. In the Alfalfa species, the highest amount of production per unit area was in the 10% treatment, and in the Poterium species, it was in the control treatment and then decreased. The percentage of relative humidity, potassium, nitrogen, and protein decreased in both species with increasing Salinity level, while the sodium percentage increased. Overall, the Alfalfa species had better performance in terms of yield per unit area and salt tolerance than the Poterium species in all stages of Germination and growth and had good potential for growth under saline stress conditions up to 20%. Therefore, it is recommended as a salt-tolerant species.

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