Correction of iron chlorosis in peanut (arachis hypogea shulamit) by ammonium sulfate and nitrification inhibitor

U. Kafkafi, Ruth Ganmore Neumann

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Peanut (Arachis hypogea cv. Shulamit) grown on very high calcium carbonate (CaCO3) content soils is showing iron (Fe) chlorosis symptoms. Supplying the plant with ammonium sulphate ((NH4)2SO4) in the presence of nitrapyrin (N-Serv) for preventing nitrification reduced Fe chlorosis. Nitrate (NO3) developed in the soil with time, even with nitrapyrin present. When ammonium (NH4) was even less than 20% of the total mineral N in the soil, no Fe-stress could be observed, suggesting that the NH4 uptake by the plant and the consequence of hydrogen (H+) efflux occurs from the root to the rhizosphere, resulting in a decrease of redox potential near the root, and solubilizing enough Fe near the root to overcome the chlorosis.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalJournal of Plant Nutrition
Volume8
Issue number4
DOIs
StatePublished - 1 Apr 1985
Externally publishedYes

Keywords

  • ionic balance
  • NH4 uptake
  • Nitrapyrin
  • redox potential and lime

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