بررسي اثر تنش خشكي بر خواص كمي و كيفي و شاخص هاي رشد ذرت ، سورگوم و ارزن

Performance of the effect of drought stress on qualitive and quantitative characters of corn, sorghum and millet

To study the effects of different levels of drought stress on qualitative and quantitative characteristics of corn, sorghum and millet, an experiment was conducted at experimental farm in Qazvin. The design of the experiment was factorial in Randomize Complete Block Design. Three levels of stress factors without stress (A1), medium level (A2) and high level (A3). three different crop plants: corn (B1), SOrghum (B2) and millet (B3) were employed. The index of stress was RWC for irrigation regime as 60-70% RWC for high stress, 80-85% for medium and over 95% for without stress. The results showed that the whole of traits are affected to drought stress though they were different in corn, sorghum and millet. Protein percent was increased but starch percent was decreased by drought. Dry matter yield and grain yield were decreased and growth rate was also decreased. The corn was more sensitive than sorghum and millet to water stress, so in dry regions sorghum and millet as a forage crops, is suggested.