بررسی تغییرات عملکرد علوفه، پرولین و مالون دی آلدهاید در ذرت و سورگوم تحت تنش خشکی و کاربرد بقایای جو، زئولیت و پلیمر سوپرجاذب

In order to investigate the changes in forage yield, proline and malondialdehyde of maize and sorghum under water stress and combination treatments of barley residue, zeolite and superabsorbent polymer (RZS) an experiment was conducted in two years (2012-2013) in Kerman-Iran. Randomized complete block design, arrangement in factorial split was used with three replications. Water stress based on 70 and 140 mm evaporation from pan and plant type (maize and sorghum) as factorial combination were located in main plots. RZS treatments were in sub plots as follows; 10 t ha-1 zeolite + 4.5 t ha-1 residue(ZR), 60 kg ha-1 superabsorbent + 4.5 t ha-1 residue(SR), 5 t ha-1 zeolite + 30 kg ha-1 superabsorbent +4.5 t ha-1 residue(ZSR), 4.5 t ha-1 residue (R) and Control(C). In both plants, increased proline and malondialdehyde under water stress but forage yield was decreased significantly. Between combination treatments of barley residue, zeolite and superabsorbent polymer, control treatment had the highest proline and malondialdehyde and lowest soluble protein and forage yield. The amount of forage yield of maize and sorghum (first cutting) were 62.8 and 49.3 t ha-1 respectively. Based on the results, the application of 10 t/ha zeolite and 4.5 t ha-1 barley residue increased the yield of both plants by drought mitigation and reduction of oxidative stress.