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http://dx.doi.org/10.7740/kjcs.2019.64.3.193

Effect of Climate on the Yield of Different Maturing Rice in the Yeongnam Inland Area over the Past 20 Years  

Shin, Jong-Hee (Division of Crop Research, Gyeongsangbuk-do Provincial Agricultural Research and Extension Services)
Han, Chae-Min (Division of Crop Research, Gyeongsangbuk-do Provincial Agricultural Research and Extension Services)
Kwon, Jung-Bae (Division of Crop Research, Gyeongsangbuk-do Provincial Agricultural Research and Extension Services)
Kim, Sang-Kuk (Bioresources Research Institute)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.64, no.3, 2019 , pp. 193-203 More about this Journal
Abstract
The aim of this study was to analyze the relationship between rice yield and climate elements in Daegu (southern plain area) and Andong (inland mountainous area) regions. Over the past 20 years, rice yield has increased in both regions. The rice yield of middle and mid-late maturing cultivars in the recent 5 years increased by about 10% and 18%, respectively, compared to that produced in the early 2000s in the Daegu region. In the Andong region, the rice yield of mid-late maturing rice cultivars in the recent 5 years was higher by about 7% than that of the early 2000s. The number of panicles per hill and grain ripening rate significantly affected rice yield in mid-late maturing cultivars. In addition, the grain weight and grain ripening rate significantly affected rice production in middle maturing cultivars grown in the Daegu region. With regard to the middle maturing cultivars, the relationship between grain weight and rice yield had a positive significant correlation in both regions. To understand the effect of climate factors on rice yield, the milled rice yield of several rice cultivars produced over the past 20 years (1999-2018) at both locations, Daegu and Andong, were evaluated. The rice yields increased owing to long sunshine duration during the grain filling stage in the Daegu region. In Andong, rising maximum temperature during the vegetative stage increased rice yield of early and mid-late maturing cultivars. Long sunshine hours increased yield of mid-late maturing cultivars in both regions.
Keywords
climate; grain yield; mature type; rice;
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