The temperature and temperature control of the greenhouse grape germination directly affects the flowering and fruit setting of the grapes. What measures should be taken to control the temperature and humidity before the germination?
In the shed before the germination of the grape, a 3 to 5 degree stone sulphur mixture should be used to achieve the purpose of killing eggs and germs to prevent future pests and diseases. The temperature in the shed was controlled to about 20 °C one week before the germination period, and then gradually increased to 25-28 °C. During the germination period, the temperature in the shed was kept at 28 °C during the day and the night temperature was maintained at 13-15 °C.
The method of heating up is best to choose a method of heating the air through the pipe in the shed, instead of producing a stove in the shed to avoid excessive carbon dioxide and carbon monoxide, which endangers human safety. Recently, the temperature in the whole province is high. If the temperature in the greenhouse is higher than the standard, the method of covering the straw curtains can be used to cool down, but do not open the shed to prevent the water from escaping and the humidity drop.
In the case of existing irrigated land, the relative humidity in the shed is generally about 80%. This humidity is also the suitable humidity for grape growth before the germination period. After entering the germination period, the humidity will drop to about 70%. During this period, it needs to be done. The guarantee is to keep this humidity constant until the end of the germination period. It should be noted that the wind can not be opened and the humidity is lowered.
In the process of heating up, if the surface temperature can not rise, do not raise the temperature. After the indoor temperature is maintained at 28 °C for a period of time, the surface temperature can gradually rise to the same level, and excessive temperature rise, the temperature will be too high, which will affect the seedling stage. Growing.
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