Investigation the effect of different Saline Water Regimes on Morphologic and Growth properties of Quinoa

In this study, five qualities of water are evaluated on morphological properties and water productivity of Quinoa (CV. Titicaca). The research was done based on a completely randomized design, including 3 replications as pot planting in the Ferdowsi University of Mashhad in Greenhouse conditions, during 2017-2018. In this study, five irrigation regimes existed (freshwater, saline water, alternate saline water, and freshwater, a mixture of 50:50 saline and freshwater, subsurface irrigation of saline water). The seeds of Quinoa were planted at a depth of 2.5 centimeters in the soil of each pot and were irrigated with tap water. Plants harvested after 70 days, shoot fresh and dry weight, leaf number, plant height, SPAD index, leaf area, branch number, stem diameter, and water productivity were measured. The obtained data analyzed using statistical software of SAS (Ver. 9.0) and the means were compared using the LSD test at 5% percent levels. The results showed that the effect of different irrigation regimes on leaf number, shoot fresh weight, plant height, SPAD index, and leaf area were significant at the 1 percent level (p < 0.01), but branch's number, shoot dry weight, stem diameter, and water productivity was significant at the 5 percent level (p < 0.05). In this study, all of these parameters decreased significantly with irrigated by saline water. Subsurface irrigation has resulted in decreasing shoot fresh and dry weight by 14.4 and 17.2 percent, respectively. Alternate treatment has resulted in decreasing shoot fresh and dry weight 22.8 and 39.8 percent, respectively. So, results showed that Quinoa has good tolerance to elevated levels of salinity and it seems that a good stand establishment in saline soils and water conditions could be insured if proper management is exerted in farms