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本文通过对大棚内甜瓜的生长发育环境进行昼夜24h不间断观测,对所得数据进行系统分析,结果表明,大棚甜瓜栽培过程中,气温日变化随着太阳高度和外界温度变化而变化。1天中气温变化大致呈单峰曲线,最低温度出现在日出前1 h,日出后气温缓慢回升,08:00~10:00时迅速回升:最高温度出现在12:00~14:00,16:00左右开始降温,到19:00降温缓慢,夜间温度下降平稳。地温在白天随气温的升高而升高,在14:00达到最大值。夜间由于各种辐射以及其他原因,地温的变化比较平缓,在夜间略高于气温。叶温则紧随气温的变化而变化,受地温的影响比受气温的影响小,但在夜晚特别是在凌晨,叶温受地温的影响较大。
In this paper, by observing the growth and development environment of muskmelon in greenhouse overnight uninterrupted day and night, the data were systematically analyzed. The results showed that the diurnal variation of air temperature varied with the height of the sun and the outside temperature during the melon cultivation. The air temperature showed a single peak curve in 1 day, the lowest temperature appeared 1 h before sunrise, and the temperature slowly rose after sunrise. The temperature rose rapidly from 08:00 to 10:00: the highest temperature appeared between 12:00 and 14:00 , Around 16:00 began to cool down slowly to 19:00, night temperature dropped smoothly. The ground temperature rises with the temperature during the day and reaches a maximum at 14:00. Due to various kinds of radiation at night and other reasons, the change of geothermal temperature is relatively gentle, slightly higher than the temperature at night. Leaf temperature is followed by changes in temperature changes, by the impact of ground temperature than by the impact of temperature is small, but at night, especially in the early morning, leaf temperature by greater impact on ground temperature.