Effects of the Incorporation of Phosphorus and Iron into Arsenic-Spiked Artificial Soils on Root Growth of Lettuce using Response Surface Methodology

Namin Koo, Min Suk Kim, Seunghun Hyun, Jeong-Gyu Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)


We investigated effects of phosphorus (P) and iron (Fe) on root elongation (RE) of lettuce in arsenic (As)-spiked soils using response surface methodology (RSM). To stabilize interactions between As and Fe in a soil preparation, the sequential incorporation method using Fe and P (SIMFe-P) was applied. From a phytotoxicity assay, As in roots (Asroot) was negatively associated with RE, Fe in soils, and P in roots and soils. The P in roots was also positively related to RE. In a model study, As and interaction factor between P and Fe showed negative coefficients but others showed positive ones. From a confirmation study, RE on exposure to As was verified to be much greater in soils treated by SIMFe-P than in soils separately treated with both elements. These results indicated that application of SIMFe-P to As-contaminated soils might be expected to have an advantage during the early stage of plant root growth.

Original languageEnglish
Pages (from-to)1259-1271
Number of pages13
JournalCommunications in Soil Science and Plant Analysis
Issue number7
Publication statusPublished - 2013 Apr 1



  • Arsenic
  • iron
  • lettuce
  • phosphorus
  • response surface model
  • root elongation

ASJC Scopus subject areas

  • Soil Science
  • Agronomy and Crop Science

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