Insulation not forget ventilation
Outside temperatures are low, and sometimes lighting conditions are not good. To ensure the greenhouse temperature, many vegetable farmers are not willing to ventilate. After the unveiling of the haystacks, it will be used to supplement carbon dioxide inside the shed, promote photosynthesis, discharge harmful gases accumulated in the shed, and be ventilated and ventilated under the premise of ensuring no cooling. The length of ventilation time can be determined by the temperature conditions in the booth.
Water control but not water shortage
Every time when the temperature is down, vegetable farmers are afraid that after watering, there is a phenomenon of rooting, or after the watering, the humidity in the shed increases. The vegetables in the result period have more demand for fertilizer and water. It is recommended that vegetable growers should choose the fine weather according to the soil moisture content to make up the vegetables to make up for the moisture, and choose the way of under-irrigation or pouring of small water under the membrane.
Timely fertilization, but not excessive
In the low temperature period, the activity of the root system of the plant deteriorates, and it is easy to cause problems with roots and yellow leaves caused by chemical fertilizers. At present, fertilizer should be mainly organic fertilizer or biofertilizer. However, the amount of fertilizer should not be excessive. Follow the principle of “eat less foodâ€. Usually topdressing organic fertilizer or biological fertilizer 15-20kg/mu.
Leaf nutrition can not be forgotten
In the low temperature period, the activity of roots is weak, and foliar fertilization is a good way to supplement plant nutrition and prevent nutrient deficiency. At present, the commonly used foliar fertilizer is full-nutrition type, such as the Green Fenwei series foliar fertilizer, Fangrun foliar fertilizer, diversified force and so on. When the plant lacks the phenomenon, it can be sprayed with the corresponding foliar fertilizer to alleviate it.
Spraying plant growth regulators
Spraying growth regulators such as alizarin lactones, love overdose, and booster pigments can regulate the growth of crops and increase their resistance to disease and stress. Weakly growing plants can be sprayed with 1,500 times more alizarin lactone or 6,000 times more love. Plants with prosperous growth can be sprayed with 5% to 1500-1500 times of 25% Met.
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