See more from this Session: Climate Change: History, Cause, Effects and Mitigation Strategies
As temperature increases, rice is faced with critical change such as growth duration shortening, heading acceleration, yield decrease and quality deterioration. So, we studied the rice growth and yield change by the temperature increase.
To confirm the effects of temperature rise, rice cultivars such as early maturing Unkwangbyeo, medium maturing Hwayoungbyeo and late maturing Nampyeongbyeo were transplanted on 1, 15, 30 of June inner transparent vinyl house which was treated by different temperature from transplanting to harvesting.
The increased mean temperature were 1.4°C∼3.5°C, respectively, compared to outer field. The growth duration from transplanting to heading were shortened by the temperature increase. Consequently, the rice have to be ripened in more warmer temperatures than conventional optimum condition. So rice grain became smaller and was not filled up by starch sufficiently in increased temperature conditions.
As temperature increases, rice protein content increased consistently, but amylose content decreased on the contrary.