The effect of use of K-Nanofertilizer (as an environment friendly) in reducing drought stress of soybean

Introduction: Since chemical fertilizers have a major potential to pollute soil and water; in recent years, many efforts were done to minimize these problems by agricultural practices and the design of the new improved fertilizers and environment friendly. Material and Methods: In order to evaluate the effect of a new type of fertilizer potassium (potassium Nanofertilizer) on the qualitative and quantitative characteristics of soybean under irrigation, an experiment was conducted in a split plot arrangement based on randomized complete block design with three replications in Moghan plain at 2015 and 2016 years. The main plot was irrigation at four levels which included IR1: control, IR2: cutting irrigation during vegetative phase, IR3: cutting irrigation during flowering phase and IR4: grain filling phase and three levels of K-Nanofertilizer (NK1= 5 kg/hectare, NK2= 10 kg/hectare and NK3= 15 kg/hectare) as a sub plot. Results: The results of comparing showed that, at all stages of off-irrigation nanofertilizer potassium cause relieve the effects of drought stress. The maximum values of yield and yield components under normal irrigation and off-irrigation conditions were obtained with use of 15 kg/hectare of K-Nanofertilizer (IR1NK3). Also the maximum values of plant height (66 cm), the first pod from the ground (20 cm), number of leaves per plant (345) and the number of side branches (66/19) were obtained in treatment of IR1NK3 and the least they were showed in treatment of IR2NK1. The results showed that the percentage of grain oil and grain protein content is strongly influenced by drought stress especially off-irrigation at during grain filling stage. According to the results, in total can be stated that the consumption of large amounts of potassium Nanofertilizer can be deficit effects of drought stress particularly in grain filling stage reduced to 15 percent And the pollution caused by chemical fertilizers containing the essential elements needed by plants spared.

کلیدواژه ها:

Drought Stress ، Environment ، Nanofertilizer