Influence of Saline Water on Plant Growth, Yield and Quality of Sunflower Hybrid

Sunflower is an important oil crop, which is tolerant to water and salt stress and can be planted in vast areas of China. In our studies, four salinity levels of irrigation were used to irrigate one kind of sunflower (TO01244) under two irrigation low limits (65%FC and 75%FC). Plant growth, Soil salinity and leaf water status, yield and quality were researched. The results showed the means of plant heights under 2g/L, 3.5g/L and 5g/L irrigation water were 9.07%, 12.45% and 18.35% lower than the tap water respectively. In soil salinization the means of ECe increased by 271.13%, 173.22%, 132.98% and 4.73% respectively under irrigation water of four salinity levels. It can be found that the seed under 3.5g/L irrigation water had more linoleic acid, which is healthy to human and contribute to address the cardiovascnlar and cerebrovascular diseases as an important part of the sunflower oil. Facing the increasingly serious lack of fresh water resources, development and utilization of underground saline water would play an important role in agricultural production.