Foliar applications of FeSO4 alone and in combination with citric acid can reduce iron deficiency induced chlorosis in two Pakistani peanut (Arachis hypogaea L.) varieties

Abstract

Present study was conducted to check the ameliorative effect of foliar applications on iron (Fe) deficiency in peanut. The hydroponics experiments were performed at National Agriculture Research Centre, Islamabad, Pakistan. Various foliar treatments were used to check FeSO4 alone and its combined effect with citric acid and surfactants. FeSO4 alone and in combination with citric acid showed ameliorative effect on Fe deficiency in peanut. Active Fe concentration of BARI-2000 and BARD-699 increased up to 52% and 25% as compared to control, when foliar treatment of FeSO4 was applied. Combined effect of FeSO4 and citric acid resulted 55% and 56% increase of active Fe concentrations compared to control. However, foliar application of surfactant (sodium dodecyl sulphate) suppressed the growth of peanut. Various morpho physiological parameters showed that BARD-699 was more responsive to foliar applications, while citric acid alone and in combination can be used in correcting Fe deficiency in both genotypes.