Effect of orange leonardit material doses on salt stress resolves in peanut (Arachis hypogaea L.)

This study was established as a pot experiment in open air conditions in the campus area of Bingöl University Faculty of Agriculture in order to investigate the positive and negative effects of NaCl salt and leonardite material doses prepared at different rates in the summer season of 2021 on the development of NC-7 peanut variety. The peanut experiment was established according to the randomized plots factorial design with 4 replications. In the experiment, NC-7 peanut variety and 5 different doses of leonardite (0 kg/da, 25 kg/da, 50 kg/da, 75 kg/da and 100 kg/da) and 4 different NaCl doses (0 mM, 50mM, 100mM and 150mM) were used. 5 kg of soil was placed in the pots and 5 peanut seeds were planted in each pot, and after the emergence, thinning was done and 3 plants were left in each pot. As a result of the study; plant height 10.06-12.36 (cm), number of branches 3.00-3.78 (pieces/plant), seedling fresh weight 5.66-8.94 (g), seedling dry weight 4.42-7.27 (g), leaf area index 36.62- 47.53 (cm2), root length 26.31-45.93 (cm), root fresh weight 0.44-2.52 (g), K ratio 0.957-1.337 (%), Na ratio 386.25-699.05 (mg) /kg) observed to vary between. According to the data obtained in the experiment; NaCl salt application had a significant effect of 0.05 on the seedling dry weight, seedling fresh weight, sodium (Na) and root fresh weight of our peanut variety. Leonardite application had a significant effect of 0.05 on plant height, root length, K (potassium) and root fresh weight of our peanut variety. Looking at the Leonardite x NaCl interaction, root length, root fresh weight, seedling dry weight, K (%) ratio and Na (mg/kg) amount were found to be significant at the level of 0.05. As a result, It was determined that leonardite material applied to peanuts grown in soils with high NaCl dose reduced the effect of salt in the soil.