Impacts of Climate Change and Follow-up Cropping Season Shift on Growing Period and Temperature in Different Rice Maturity Types

Abstract

This experiment was conducted to investigate the effect of future climate change on growing period and temperature in different rice maturity types as global warming progressed, where Odaebyeo, Hwaseongbyeo, Ilpumbyeo were used as a representative cultivar of early, medium, and medium-late rice maturity type, respectively, and A1B scenario was applied to weather data for future climate change at 57 sites in Korea. When cropping season was not adjusted to climate change, entire growing period and growing temperature were shorten and risen, respectively, as global warming progressed. On the other side, when cropping season was adjusted to climate change, growing period and temperature after heading date were not changed in contrast to growing period and growing temperature before heading which were more seriously shortened and risen as global warming progressed than in not adjusted cropping season. It is supposed that adjusting cropping season to climate change can alleviate rice yield reduction and quality deterioration to some degree by improving growing temperature condition during grain-filling period, but also still have a limit such as seriously shortened growing period indicating that there need to develope actively new rice cultivation methods and varieties for future climate change.

The relationship of mean temperature and 9 collected butterfly species’ wingspan as the response of global warming

“…According to RCP scenario, the global mean temperature has risen by 0.85 °C/10 years from 1880 to 2012 (IPCC 2013) whereas Korea's mean temperature has risen by 0.18 °C from 1912 to 2017 (NIMS 2018). It is expected that the rate of temperature increase in Korea peninsula will be severe compared to the Earth's global warming (Lee et al 2011).…”

Comparison of projected rice blast epidemics in the Korean Peninsula between the CMIP5 and CMIP6 scenarios

“…The optimum rice transplanting dates for all stations and periods were determined using the accumulated temperature method to estimate the heading date and, from that, estimate the transplanting date (Lee et al 2011 ; Yoon and Choi 2020 ). Briefly, the heading date was estimated to occur when the average temperature within 40 days after heading became 22.5 °C.…”

Climatic constraints to yield and yield components of temperate japonica rice

“…The daily mean temperature averaged across the growing season was 24.3˚C, which is within the optimum temperature for rice production [22-30˚C for indica (Baker & Allen, 1993;Krishnan et al, 2011) and ≤26˚C for Korean temperate japonica cultivar (Lee et al, 2015)]. However, the daily mean temperature averaged across the ripening stage was 23.1˚C, which is around the upper limit of the optimum temperature for ripening in Korean cultivars, 21-23˚C (Lee et al, 2011). In some trials, the daily maximum temperature averaged across the reproductive stage exceeded the threshold temperature for heat-induced sterility, 35˚C (Kim et al, 1996;Wassmann et al, 2009;Yoshida, 1981…”