Assessment of Zinc Transport in Different Organs and Various Growth Stages of Soybean under the Influence of Zinc, Iron and Manganese Fertilization

摘要

In order to study of zinc transport at reproductive growth stages in different organs of soybean (Glycine max L.) under the influence of zinc, iron and manganese application, two field experiments were conducted at the research field of the Islamic Azad University of Kermanshah, Iran in 2010 and 2011 growing seasons. Three rates of zinc (0, 20 and 40 kg ha~(-1) from ZnSO_4 source), iron (0, 25 and 50 kg ha~(-1) from FeSO_4 source) and manganese (0, 20 and 40 kg ha~(-1) from MnSO_4 source) were used. At sampling times, five plants selected randomly, zinc concentration was determined by atomic absorption spectrometry and then ratios of this element in soybean organs were calculated. Based on results obtained, with increases soybean old from onset flowering to final maturity, Zn concentration declined in stem and leaves. Also, Zn content in leaves was more than the stem in all the growth stages. [Zn]leaf/[Zn]stem ratio was increased with zinc, iron and manganese applications, So that, the ratio of [Zn]leaf to [Zn]stem was more than 6.5 times. In our experiment, [Zn]seed/[Zn]stem, [Zn]seed/[Zn]leaf and [Zn]seed/[Zn]pod ratios were recorded more than 9, 1.4 and 1.2 times, respectively.