Choose fertilizer carefully
The ventilation in the shed is small, and harmful gases are easy to accumulate and cause gas damage. Therefore, it is not suitable to use volatile fertilizers for flushing.
Proper application method
When applying fertilization, the solid chemical fertilizer should be dissolved in water in advance to make a mother liquor, and then rinsed with water (the organic fertilizer should be retorted about 10 days in advance, and the supernatant should be rinsed with water). Do not directly sprinkle chemical fertilizers and then water them to avoid uneven fertilization, excessive local concentration, and root burning.
The concentration of fertilizer solution should be appropriate
The amount of water for flushing fertilization is generally relatively large. When fertilizing, the fertilizer is highly diluted. If the fertilizer solution concentration is too low, the fertilizer efficiency will be poor, and it will not have the effect of fertilization; if the amount of fertilizer is too large, or the amount of water is insufficient during fertilization, resulting in too high fertilizer solution concentration, root burning is likely to occur. For volatile fertilizers, when the concentration of the fertilizer solution is too high, the amount of harmful gases volatilized into the air is relatively increased, and the chance of gas damage also increases. Generally speaking, when watering according to the normal watering amount, the fertilization amount of solid chemical fertilizer can be used at about 120% of the conventional ground fertilization amount. The fertilization amount of liquid fertilizer should be a little turbid after the fertilizer liquid is mixed into the water. The special flushing fertilizers currently on the market can be carried out according to the instructions.
Balanced fertilization must be scientific
Some farmer friends recognize a kind of fertilizer, and use it as a "universal fertilizer". As a result, a single nutrient is too much, causing physiological diseases in vegetables. The correct method is to balance the fertilization according to the different growth and development stages of the vegetables, and use the *** fertilizer alternately.
Prevent gas damage in time
In winter, the shed is closed for a long time. If you do not pay attention to ventilation after fertilization, harmful gases will easily accumulate in the shed and cause gas damage. Therefore, in winter when it is cloudy, you should try to avoid using immature chicken manure, fertilizers with high nitrogen content, etc., and use bio-organic fertilizers to strengthen root maintenance. In addition, when top dressing is needed in the middle and late stages of vegetable growth, you can choose to do it in the sunny morning, and let the wind blow after top dressing. Once air damage occurs, timely remedial measures should be taken: first, loosen the soil in time, strengthen ventilation, so that harmful gases can be emitted from the shed as soon as possible, and should be properly ventilated on cloudy days. Release at high temperatures. The second is to spray plant growth regulators such as cytokinin and Aiduoshou to promote the recovery of the damaged crops as soon as possible.
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