تاثیر تنش کم آبی و تراکم‌های مختلف ماش بر ویژگی های فیزیولوژیک برگ گیاه آمارانت (Amaranthus Caudatus L.)

An experiment was conducted in 2013 at the Research Farm of the University of Tabriz, to evaluate the effect of water stress and mungbean plant density on the leaf area index, leaf area ratio, specific leaf area, leaf weight ratio and yield of amaranth. Sowing density of mungbean were 0, 20, 40 and 60 plant / m2. The field experiment was arranged as split plot based on RCBD with three replications. Irrigation treatments (irrigation after 70 and 140 mm evaporation from class A pan) were applied after seedling establishment. The leaf area index, leaf area ratio and specific leaf area were considerably decreased with decreasing water availability. This reduction was largely attributed to deduction in cell size. Small cells can withstand turgor pressure better than large cells, and can contribute to turgor maintenance more effectively under drought conditions. The highest yield was recorded for plants under I2. This increase can be attributed to the high proportion of leaf weight under stress conditions. In forage plants, leaf weight ratio is important. All features of Amaranth leaf and biomass yield in favorable conditions and limited irrigation, especially in stressful situations, the intercropping system was enhanced compared to monoculture.