Ecology, Environment and Conservation Paper

Vol.17, Issue 2, 2011; Page No.(215-220)

EFFECTS OF ZN, FE AND MN ON SOYBEAN ELEMENTS CONCENTRATION

Soheil Kobraee

Abstract

In order to study the effects of micronutrients on leaf and grain concentration of soybean (Cv. Williams), an experiment was conducted in a factorial based on randomized complete block design with three replicates at research farm, Islamic Azad University of Kermanshah, Iran at 2009. In this research different levels of micronutrients such as Zn ( 0, 20 and 40 kg Zn ha-1 ), Fe ( 0, 25 and 50 kg Fe ha-1 ) and Mn ( 0, 20 and 40 kg Zn ha-1 ) were applied. The end of growth stage and harvesting time, for the measurement of mineral nutrient concentrations, seeds and leaves were separated from at five plants from each plot. Samples prepared and were sent to plant analysis laboratory. The economic and biological yield were also calculated. The results showed that Zinc and Iron at leaf and Zinc, Iron and Manganese at grain affected by Zn application. The effect of Fe on leaf Zn concentration not significant, but increasing Fe concentration grain and leaf. In addition, leaf and grain Mn concentration decreased by Fe applied. Grain and leaf Fe increased response to 25 kg Feha-1 applied, but did not change by 25-50 kg Feha-1. Such as zinc, leaf and grain manganese concentration in response to Mn applied were increased. The highest Mn concentrations were detected in leaves and grains, when 40 kg Mn ha-1 applied. In contrast, leaf and grain Zn concentration changed very little in response to added Mn. Economic and biological yield affected by Zn, Fe, Mn and interaction Zn and Mn.

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