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The Effects of Essential Minerals in Different Cations and Anion Forms on Assimilation of Macro and Micronutrients in Soybean Leaves

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Document pages: 10 pages

Abstract: In our present study, we have investigated the acquisition of minerals into soybean leaves as affected by application of various minerals in different forms of positive and negative ions. A greenhouse experiment was conducted including the following 11 treatments applied to the soil: potassium nitrate (KNO3), potassium iodide (KI), potassium chloride (KCl), sodium chloride (NaCl), calcium, magnesium and ammonium nitrates [Ca(NO3)2, Mg(NO3)2 and NH4NO3] and ammonium dihydrogen phosphate NH4(H2PO4), Na2SO4, ammonium sulfate (NH4)2SO4, and disodium phosphate Na2(HPO4). Besides essential minerals, KI was also included as part of this comprehensive study, since according to some reports, molecular iodine (I2) and KI may have positive effect on growth and increased stress tolerance in some species of plants. Soybean seeds were sown in pots arranged in twelve groups 3 replicates in each group including control. At V3 stage the plants were treated with 30 mmol pot of the proper chemicals. Ten days after the treatments, leaves were sampled and were dried, analyzed for 5 macro (K, P, S, Ca & Mg) and micronutrients (B, Cu, Fe, Mn, Zn and Na). The results showed that of all the 11 treatments, KI (T4) application increased the maximum number of mineral nutrients in leaves, which increased K by 31.9, Mg by 8, P by 60.8, S by 38.7 respectively. KI treatment also reported increased micro minerals by B, Cu, and Zn were 53.6 , 36.3 and 10.8 respectively. Similarly, KNO3 (T1) application increased several macro and micronutrients in leaves. We made an attempt to investigate the effects of various other cations like K1+ vs Na1+, and NH+ 4, Ca2+ vs Mg2+; and Anion comparisons I1- vs NO1-3, Cl1-, H2PO14; SO2-4   vs (HPO4)2- in the present investigation. After reviewing our results, of all the 11 (eleven), treatments studied in our present study, T1 (KNO3), T4 (KI) and T10 Ca(NO3)2 applications proved to be the most efficient treatments by affecting the uptake of several minerals in soybean leaves.

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