Effect of water stress and foliar application of Methanol on some morphological traits in soybean

In order to evaluate effects of drought stress and spraying methanol on some morphological traits of soybean, an experiment was run as split plot in a randomized complete block design with three replications done at Research center in Faculty of Agriculture of Moghan. Treatments included three levels of drought stress, S1= 40percent of available soil moisture depletion (control), S2= 55percent of available soil moisture depletion, S3=70percent of available soil moisture depletion as main plots and four levels of methanol, including M1= without spraying of methanol (control), M2= spraying with 7 volumetric percentage of methanol, M3= spraying with 21 volumetric percentage of methanol and M4= spraying with 35 volumetric percentage of methanol as subplots were. The Results showed that increasing of drought stress, can lead to decreased in soybean length, branches number of leaf, number of pod, pod length and stem diameter. Also the Results showed that the effect of methanol spray there was significantly on soybean length, branches number of leaf, number of pod, pod length and stem diameter. The results showed that the highest values were obtained by 21 volumetric percentage of methanol spray, in this treatment the grain yield was 25.6 percent more than control. With the increasing amount of methanol from 21 to 35 volumetric percentage of methanol was reduced soybean length, branches number of leaf, number of pod, pod length and stem diameter, which is probably due to the negative effects of methanol in the high concentration of methanol.