اثر فیلترکیک بر صفات مرفوفیزیولوژیکی و عملکرد ذرت شیرین تحت شرایط تنش خشکی آخر فصل

In order to investigate the effect of Filter Cake application on some morpho-physiological characteristics and yield of sweet corn (Zea mays var saccharata) under different irrigation regimes, an experiment was conducted in Ramin Agriculture and Natural Resources University, Khuzestan, in 2012. The experiment was arranged in split-plot design in RCBD (Completely Randomized Block Design) with three replications. Treatments were drought stress (irrigation after 25, 50 and 75% depletion of available water content) in main plots and Filter Cake (0, 10, 20 and 30 tonha-1) arranged in sub-plots. Results showed that drought stress increased electrolyte leakage (EL) and proline content (PC) while height of plant, relative water content (RWC), chlorophyll stability index and ear and grain yield were decreased. The intensive drought stress had the greatest effect on EL and PC (54% increase), and decreased ear and grain yield by21 and 37% compared to control, respectively. Application of filter cake on non-stress condition increased height of plant and economic yield. But Filter Cake in intensive stress reduced RWC and yield and increased EL compared to control. Also, the application of 30 tonha-1 of Filter Cake in intensive stress condition decreased ear and grain yield by 14.5 and 10.7% respectively. Thus, positive effect of Filter Cake application was clear on non-stress condition, but on drought stress condition it decreased the economic yield.