Effect of Climate Change on Winter Weeds Based on Early Growth and Seed Production of Common Henbit (Lamium amplexicaule) and Spiny Sowthistle (Sonchus asper) under Elevated Temperature
2022
Kim, J.W. | Seo, H.A. | Jeong, H.W.
This study was conducted to develop a method of impact assessment of climate change by investigation of effect of temperature on germination, early growth, and seed production of two winter weeds common henbit (Lamium amplexicaule) and spiny sowthistle (Sonchus asper). Germination of common henbit was decreased but that of spiny sowthistle was not changed as the temperature increasing. Early growth of the two weeds were increased by the temperature increasing. Seed production of common henbit was increased 18.9% by 5℃ increment. Number of flower and sterility of spiny sowthistle were increased, but total number of seed was not changed under 5℃ increment condition. Temperature responses of winter weeds could be more various as the two weeds were different. Practically, investigation of temperature response of major weeds could be effective and efficient. Therefore, impact assessment of climate change on weed occurrence should be based on physiological response of major weeds resulting from factual survey of weed occurrence.
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