The comparison of the effect of osmopriming , hydrothermalpriming at different levels of phosphoruse on yield and yield components of corn (Zea mays L.) .

In this study, we aimed to determine the effects of halo-priming on yield and yield components of four wheat cultivars in a saline soil. A field study was conducted in factorial based on randomized complete block design (RCBD). Soil pH was 8/1 and electrical conductivity was 9 dS/m. Wheat cultivars (Falat, Ghods, Chamran and Shoori4) were primed with CaCl2 solutions (Control, 0, 50 and 100 mM). Plant length, spike length, kernel in spike, kernel weight, grain yield, biological yield and harvest index were affected by cultivars. The highest grain yield, plant length and harvest index were observed in Shoori4 and Ghods cultivars, and the lowest grain yield, spike length and kernel in spike were observed in Chamran cultivar. Kernel in spike was highest in Ghods cultivar, and highest kernel weight was observed in Shoori4 and Chamran cultivars. The results of this study indicated that halo-priming had different effects in different wheat cultivars. Priming with 0 mM CaCl2 (hydro-priming) increased germination rate of Chamran and Ghods cultivars significantly. Halo-priming significantly increased leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR) of Chamran cultivar. Hydro-priming increased grain yield of Chamran cultivar, but decreased grain yield of shoori4 cultivar. Halo-priming with 100 mM CaCl2 decreased grain yield of Ghods cultivar. Among the investigated wheat cultivars, Chamran was received the highest positive effects of hydro-priming.