Projecting Climate Change Impacts Both On Rice Quality And Yield In Japan

Masashi Okada, Yousay Hayashi, Toshichika Iizumi, Masayuki Yokozawa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


This study examined the impacts of climate change both on rice quality and yield using a climatologically empirical rice quality model together with a process-based rice growth model. The target area is Kyushu in the western part of Japan, where the decline in rice quality already occurs at the present time. After confirming the model reproducibility, we made simulations to project the changes of rice quality under climate change scenarios. All the projections suggested that the rice quality would significantly deteriorate. We analyzed the results by distinguishing the direct and indirect effects of climate based on simulations with changing weather data. It suggested that the indirect effect induced by the shift of the grain-filling period is relatively larger than the direct effect by temperature rise. We also examined the effects of adaptation measure shifting the date of transplanting on rice quality and yield. It is shown that rice quality is more sensitive to the shifting transplanting date than rice yield; consequently, shifting the transplanting date later might be an appropriate measure for the adaptation to climate change.

Original languageEnglish
Pages (from-to)285-295
Number of pages11
Journaljournal of agricultural meteorology
Issue number4
Publication statusPublished - 2011 Sept 1
Externally publishedYes


  • Adaptation
  • Quality
  • Sensitivity
  • Trade-off
  • Yield

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Atmospheric Science


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