Low-temperature freezing shelter effect is good
It is now the coldest time of the year. If the greenhouse is idle, it can be used as a cold shed to freeze pathogenic spores and pests scattered in the shed, so as to reduce the number of pests and diseases in spring sheds in the coming year. The freezing steps are as follows:
First, thoroughly clean the booth
Before the frozen shed, the dead leaves of the shed must be cleaned, because it carries a large number of pathogenic bacteria.
Second, spread chicken manure
After clearing the shed, spread the manure evenly on the shed, and freeze it at a low temperature for 7 to 10 days. The length of time depends on the temperature. If the temperature is not very low, the freezing time should be longer to ensure the chicken. The pathogenic bacteria and eggs contained in the feces were frozen and then dumped deep into the soil.
Three, deep turning the soil
After the chicken manure is frozen, the shed is deeply turned, so that the permeability of the soil is enhanced, the frozen soil layer will be deeper, and the sterilizing and insecticidal effect of the frozen shed will be better. Generally, the soil is deep-turned about 30 centimeters, and the soil blocks are broken up and crushed. The bigger the pores are, the better, and then it enters the natural freezing period.
Fourth, open the vent
When the shed is frozen, the shed film of the shed shall be lifted for ventilation. In the shed, which is prepared for a new membrane the following year, the shed film may be completely removed, so that the shed temperature is consistent with the outside world, so as to improve the effect of the shed.
Fifth, close the tuyere thaw
About a month or so of freezing, about 20 days before the planting of spring eel vegetables, close all the air outlets to warm up and thaw them. During this period until the end of planting period, it is necessary to release the air properly. The harmful gases such as ammonia released from manure fermentation will harm the vegetable seedlings.
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