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http://dx.doi.org/10.7740/kjcs.2016.61.3.171

Yearly Variation in Growth and Yield of Winter Hulless Barley at Iksan  

Choi, Inbae (National Institute of Crop Science)
Kim, Hakshin (National Institute of Crop Science)
Hwang, Jaebok (National Institute of Crop Science)
Gu, Bonil (National Institute of Crop Science)
Bae, Huisu (National Institute of Crop Science)
Park, Taeseon (National Institute of Crop Science)
Park, Hongkyu (National Institute of Crop Science)
Lee, Geonhwi (National Institute of Crop Science)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.61, no.3, 2016 , pp. 171-183 More about this Journal
Abstract
The effects of weather variations on winter hulless barley were analyzed using data obtained from winter crop situation test at Iksan from 1985 to 2015. The wintering stage in the 16 years from 2000 to 2015 has become colder and shorter than that in the previous 15 years from 1985 to 1999. This has resulted in an early sequence of regrowth date, heading date, and ripening date. Heading date of hulless barley was mostly influenced by regrowth date and period of stem elongation. Futher, the regrowth date and period of stem elongation were strongly negatively correlated with the average air temperature in February and the maximum air temperature in March, respectively. The number of spikes per $m^2$ and 1000-grain weight of Saechalssal cultivated from 2003 to 2015 showed strong positive correlations with yield. In early heading years, yield increased with extended ripening period and with increased 1000-grain weight. There was a strong negative correlation between 1000-grain weight and the average temperature during the ripening period. In the 15 years from 1985 to 1999, warm winters contributed to yield increase with increase in the number of spikes per $m^2$ and a long ripening period. In contrast, in the recent 16 years from 2000 to 2015, the large variability in air temperature during the wintering stage, the decreasing number of spikes per $m^2$ and the steadily increasing air temperature and decreasing precipitation during the ripening stage have caused high temperature stress and yield loss in late heading years.
Keywords
growth stage; hulless barley; Iksan; weather variation; yield;
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Times Cited By KSCI : 7  (Citation Analysis)
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