Impact of climate change on paddy rice yields and irrigation

Ray Shyan Wu, Ming Hsu Li, Ting Yu Chen

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)

摘要

The change of temperature and rainfall patterns induced by climate change will affect the growth and the yield of crops. Most of researches assess the impact of climate change on crops yield use the crop growth model. In this study, the Decision Support System for Agrotechnology Transfer (DSSAT) software package was used in association with weather generation developed for the input of weather data to assess the impact of climate change on the rice yield of the first period crop in Taoyuan. Climate change also affects the irrigation water requirements of paddy rice. Therefore, this study estimates the change of the irrigation water requirement of the first period crop in Taoyuan with growth stages simulated by the DSSAT. Under climate change, without considering the direct impact of changing in carbon dioxide concentration and assuming the same planting date, the results show that the production of rice has a trend of increase. The changing rates of the yield in the near future (2020-2039) range from 0.52% to 2.33%. While the changing rates of the yield in the far future (2080-2099) range from 2.84 % to 7.86 %. Under most climate scenarios, the change in irrigation water requirement is not significant. The reason is that on one hand, the rise in temperature leads to the increase in crop water requirement causing the increase of irrigation water requirement, but on the other hand, the rise in temperature leads to reduce in the growth days causing the reduce of irrigation water requirement, and then offset the effect of increasing.

原文???core.languages.en_GB???
頁(從 - 到)11-25
頁數15
期刊Taiwan Water Conservancy
60
發行號4
出版狀態已出版 - 2012

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