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气温以黄瓜为例,昼夜气温变化在10～35℃时生长结瓜均正常,而以15～30℃最好。气温高于35～40℃时,同化和呼吸作用即失去平衡,对开花结果有害。低温在8℃以下生长几乎停止,经逐步驯化可耐2～3℃低温,0℃左右则冻死。生育适温随品种、发育期和光照强弱稍有波动。对于喜高温的果菜如茄子、青椒和喜冷凉的叶类菜如芹菜、菠菜等,其生育的气温指标见表1。
The temperature of cucumber, for example, the day and night temperature changes at 10 ~ 35 ℃ when the growth knot are normal, and 15 ~ 30 ℃ best. Temperatures above 35 ~ 40 ℃, the assimilation and respiration that is out of balance, the flowering is harmful. Cryogenic growth in almost 8 ℃ below the stop, gradual acclimation can withstand 2 ~ 3 ℃ low temperature, 0 ℃ is frozen to death. Fertility temperature with the variety, development and light intensity fluctuations slightly. For hi-temperature fruit such as eggplant, green peppers and hi cold leafy vegetables such as celery, spinach, etc., its fertility temperature indicators in Table 1.