Buckwheat is one of the traditional Korean crops which gains global attention as a
health food due to its rich nutrition. Recent extreme weather events caused by climate
change such as flooding and drought reduced crop production. Though, buckwheat grows
during the fall season in Korea, flooding is one of severe environmental stress factors
for buckwheat. The accumulated temperature of buckwheat was 1,093˜1,515 °C from sowing
to harvest and 564˜736 °Cfrom flowering to harvest, respectively. Plant height, stem
diameter, and dry matter weight were reduced as sowing date was delayed. The growing
period of 'Yangjeol1' for autumn season was approximately 55˜56 days. Total rutin
content of the spring and the autumn buckwheat is 22.8 and 23.2 mg/100 g, respectively,
showing no difference in rutin content between both cultivation seasons. Quercetin
content of the autumn ones was about 2.14 mg/100 g and was higher by about 30% than
that of the spring ones. These results suggested that autumn buckwheat has more quercetin
than spring one unlike rutin.
