Zinc accumulation in paddy rice (oryza stavia l.) by agronomic biofortification through soil-applied zinc fertilizers

Li Zhao, Zhangmin Wang, Yang Huang, Linxi Yuan, Xuebin Yin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A field experiment was designed to explore zinc (Zn) accumulation characteristics in mature paddy rice plants (Japonica rice Yang Yu No. 2) after agronomic Zn biofortification. Zn fertilizers were distributed to the paddy field during the tillering and filling stages. Rice plants were harvested and analyzed in the mature stage. The results show that Zn contents in all organs and Zn accumulation per plant increase with the increasing level of fertilization, while Zn distribution vary with different treatments. The highest Zn content in stems is up to (134. 9 ± 20. 9)mg • kg-1, which is 4. 3 times that of the control group (tillering stage), while Zn contents in brown rice increase by not more than 20. 9% and 29. 7% for the tillering and filling stage treatments, respectively. Zn accumulation in the tillering stage treatment is significantly higher than that in the filling stage (the maximum accumulation is 454. 0 jug for the tillering stage and 266. 2 jug for the filling stage). In contrast, Zn harvest index is up to 0. 336 for the filling stage, much higher than that of the tillering stage with a maximum of 0. 194. Zn biofortification through soil-applied Zn fertilizers can not only significantly increase Zn accumulation of the rice plants but also increase Zn content and Zn mass in grains. Compared to the tillering stage, it is more conducive to improve Zn level in rice grains during the filling stage.

Original languageEnglish
Pages (from-to)631-638
Number of pages8
JournalJournal of University of Science and Technology of China
Issue number8
Publication statusPublished - 2013
Externally publishedYes


  • Agronomic Zn biofortification
  • Field trials
  • Paddy rice
  • Soil-applied fertilizers
  • Zn accumulation

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