半致死温度：包括低温半致死温度和高温半致死温度。低温半致死温度是指在该温度时，植物达到半致死状态，当温度继续低于该温度时，植物所受的伤害将不可恢复甚至死亡。与高温半致死温度同理。
低温半致死温度 semilethal low temperature
植物的低温半致死温度 Lethal temperature ; LT
半数致死温度 meanlethaltemperature
According to the Logistic equation,the half lethal temperature of three varieties was -21.2℃,-24.2℃and-22.5℃,which was the same with the recover test result.
根据Logistic回归方程得出3个品种的半致死温度分别为-21.2℃、-24.2℃和-22.5℃,与恢复生长试验结果吻合。
参考来源 - 蜡梅品种抗寒性研究Emergent rhizomes recovering test showed a similar result to the freezing test indicating that LT_(50) temperature was credible to evaluate the cold tolerance of chrysanthemum.
11月底脚芽恢复生长试验与当月半致死温度测定结果基本一致，表明半致死温度可作为菊花抗寒性评价的一个可靠指标。
参考来源 - 菊花抗寒特性研究及抗寒评价体系的建立·2,447,543篇论文数据，部分数据来源于NoteExpress
这些物质的适应性变化导致低温半致死温度的下降是抗寒性提高的生理基础。
The adaptability changes of these substrates led to a drop in low semi-lethal temperature, which was the physiological basis for increasing the cold-resistant adaptability.
膜保护系统的适应性变化导致低温半致死温度的降低是抗寒性提高的生理基础。
The decline of the semilethal temperature caused by the membrane protective system is the physiological basis to improve cold resistance.
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