When the soil temperature gradually rises from low to high, the intercellular CO2 concentration in the leaves first rises, and the value of the soil temperature and humidity recorder reaches a certain value and then begins to decrease. Under different air temperature conditions, the intercellular CO2 concentration rises or falls at different rates with increasing soil temperature, and the soil temperature that begins to decline also changes. The response of intercellular CO2 concentration to elevated temperatures showed a gradual decrease, and the decline rate was faster when the plant soil temperature was higher or lower.
For different temperatures, the height of the “peak†of the transpiration rate of the leaves is different from the soil temperature at which “peaks†appear. When the ambient temperature of the leaves reaches 35°C, the transpiration rate varies sharply with the soil temperature. When the soil temperature and humidity recorder measures 15°C, the transpiration rate appears low; when the soil temperature reaches 20°C, the transpiration rate peaks. At the temperature of 10°C～30°C, the transpiration rate of the leaf showed a "single peak" change with the increase of soil temperature from 10°C to 25°C. High or low soil temperature all inhibited the transpiration of the leaf.
The soil temperature has a significant effect on the transpiration rate of the leaf. The increase of soil temperature causes the transpiration rate of the leaf to increase or decrease. Whether the transpiration rate of the leaf increases or decreases with the reading of the temperature in the soil temperature and humidity recorder depends on the range of the soil temperature change, and on the other hand depends on the air temperature condition of the blade. At the appropriate photosynthesis temperature, there was a positive correlation between the net photosynthetic rate or transpiration rate and the stomatal conductance and intercellular CO2 concentration.
When the analysis rule of the measured value of the soil temperature and humidity recorder changes, the relationship between net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration will vary greatly with the temperature conditions. Stoma closure is a major factor in the decrease of transpiration rate caused by low soil temperature or high soil temperature, and stomatal closure is also one of the factors that affect the decrease of net photosynthetic rate due to low soil temperature or high soil temperature.
For different temperatures, the height of the “peak†of the transpiration rate of the leaves is different from the soil temperature at which “peaks†appear. When the ambient temperature of the leaves reaches 35°C, the transpiration rate varies sharply with the soil temperature. When the soil temperature and humidity recorder measures 15°C, the transpiration rate appears low; when the soil temperature reaches 20°C, the transpiration rate peaks. At the temperature of 10°C～30°C, the transpiration rate of the leaf showed a "single peak" change with the increase of soil temperature from 10°C to 25°C. High or low soil temperature all inhibited the transpiration of the leaf.
The soil temperature has a significant effect on the transpiration rate of the leaf. The increase of soil temperature causes the transpiration rate of the leaf to increase or decrease. Whether the transpiration rate of the leaf increases or decreases with the reading of the temperature in the soil temperature and humidity recorder depends on the range of the soil temperature change, and on the other hand depends on the air temperature condition of the blade. At the appropriate photosynthesis temperature, there was a positive correlation between the net photosynthetic rate or transpiration rate and the stomatal conductance and intercellular CO2 concentration.
When the analysis rule of the measured value of the soil temperature and humidity recorder changes, the relationship between net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration will vary greatly with the temperature conditions. Stoma closure is a major factor in the decrease of transpiration rate caused by low soil temperature or high soil temperature, and stomatal closure is also one of the factors that affect the decrease of net photosynthetic rate due to low soil temperature or high soil temperature.
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