Feasibility of using conjunctive irrigation with seawater to irrigate coriander (Coriandrum sativum L.)

Salinity is a limiting factor in agricultural production that inflicts great damages on agricultural products. In order to decrease or stop salinity stress, numerous methods are proposed by different researchers. One of the methods to reduce the damages of salinity stress is the conjunction use of fresh and seawater. The goal of this study was to investigation the effect of conjunctive irrigation with seawater and fresh water on yield and yield components of Coriander (Coriandrum sativum L.) in greenhouse condition. the research was done based on completely randomized design including 3 replications as pot planting in Gorgan University of Agricultural Sciences and Natural Resources during 2016. In this study, four irrigation regimes existed of (Irrigation with one-fourth of sea water with tap water, Irrigation with half seawater and then one more half with fresh water, Irrigation with three-fourth of sea water with tap water, Irrigation with tap water). The results inducted that the effect of different moderation of irrigation regimes on shoot fresh weight, plant height, branches number and chlorophylls were highly significant (P<0.01), but Leaf number per plant and shoot dry weights were significant at 5 percent levels (P<0.05). The highest amount of shoot fresh weight (10.3 gr), shoot dry weight (1.87 gr) and Leaf number (15) was measured at irrigation by tap water. The result showed that the one-fourth seawater and tap water irrigation regime compared to other regimes after control regimes had the highest of all of them properties. increased one-fourth of seawater has resulted to decreasing of shoot fresh and dry weight 53.9 and 61.0 percent, respectively.