Effect of application timing of potassium fertilizer on root uptake of 137Cs in brown rice

Takashi Saito, Kazuhira Takahashi, Tomoyuki Makino, Hirofumi Tsukada, Mutsuto Sato, Kunio Yoshioka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We investigated the optimal timing and quantity of K to reduce radiocesium in brown rice. The concentration of 137Cs in brown rice was reduced from 32 Bq kg−1 without K fertilizer to 2.0 Bq kg−1 with 16 g m−2 of basal K. The concentration of exchangeable 137Cs in the soil decreased from 234 to 25 Bq kg−1 with increasing application of K fertilizer from 0 to 57 g m−2. Hence, heavy application of K fertilizer in the early growing period can decrease the uptake of 137Cs by rice plants and the concentration of exchangeable 137Cs in the soil.

Original languageEnglish
Pages (from-to)1585-1587
Number of pages3
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume303
Issue number2
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • Brown rice
  • Cs
  • Exchangeable K
  • ExchangeableCs
  • Potassium fertilizer
  • Soil-to-brown rice transfer factor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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