Reducing Iron Toxicity in Lowland Rice with Tolerant Genotypes and Plant Nutrition uri icon

abstract

  • Iron toxicity is a widespread nutrient disorder of lowland riee grown in tropical and sub-tropical regions of the world on aeid sulfate soils, L'ltisols and sandy soils with a low cation exchange capacity, moderate to high in acidity, high in easily reducible or active iron and low to moderately high in organic matter. The stress is caused by a high concentration of ferrous iron in soil solution. It is estimated that iron toxicity reduces lowland rice yields by 12-100%, depending on the iron tolerance of the genotype, intensity of the iron toxicity stress and. soil fertility status. Iron toxicity can be reduced by using iron-tolerant rice genotypes and through soil, water and nutrient management practices. The objective of this paper is to critically assess the pertinent literature on the role of iron-tolerant rice genotypes and other plant nutrients in reducing iron toxicity in lowland rice. It is emphasized that research should provide knowledge that would be used for increasing lowland rice production and productivity on iron-toxic wetlands on a sustainable basis by integration of genetic tolerance to iron toxicity with soil, water and nutrient management

publication date

  • 2010