Evaluation of Wheat Growth and Yield Change in High Temperature Conditions of Greenhouse
2018
Jeong, H.Y., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Choi, I.B., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Ahn, S.H., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Hwang, W.H., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Jeong, J.H., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Lee, H.S., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Yun, J.T., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Choi, K.J., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea
Since the yield of wheat is expected to decrease due to global warming, this study evaluated the change in wheat yield due to temperature changes. Korean wheat cv. Keumkang was sown in rows on November 7, 2016 and November 17, 2016 in temperature gradient chamber. When the mean temperature for growth period increased by 1℃, heading date shortened by 2.8days. Among yield components, ear number/m² was the most important factor for decrease of grain number/ m² and grain yield. Although grain number/ear decreased in high temperature conditions when sown on November 7, not decreased when sown on November 17. 1000-Grain weight decreased 2.1g when mean temperature for 30days after heading increased 1℃. Although above-ground biomass at heading stage was not influenced by high temperature, culm number/m² at heading stage decreased. It was thought that grain number/m² decreased by deterioration of nitrogen uptake capacity in high temperature conditions.
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