Greenhouse vegetables after the film management attention?

Currently, whether it is the autumn delay or the winter shed, the vegetable greenhouses have been replaced with new films. Since the previous sheds were covered with old film or did not cover the film, ventilation conditions, temperature, light, and plants were changed after the film was changed. The growth will definitely change significantly. The reporter suggested that the following points should be noted after changing the vegetables in the greenhouse.

First of all, the ventilation condition has changed, so pay attention to prevent gas after changing the membrane. At present, most of the manure used by many vegetable growers is not ripe enough, and ammonia, sulfur dioxide, hydrogen sulfide, and other toxic gases will be produced when the soil continues to decompose. After the replacement of the new membrane, the airtightness of the greenhouse is better. If the ventilation is not taken care of at this time, especially after the air outlet is closed at night, it is prone to air damage. Therefore, after replacing the new membrane, it is necessary to pay attention to the situation inside the booth. If gas damage occurs, it should be properly handled immediately. The foliar fertilizer containing chitin may be sprayed on the foliage to alleviate the problem.

Second, the temperature has changed, so control the temperature and humidity after changing the membrane. After a period of changing the membrane, the temperature difference between day and night may easily be too small, and if the ventilation in the greenhouse is not effective, the vegetables are prone to prolonged growth and eventually result in a low fruit setting rate. Therefore, for the current vegetables, we must first consider the temperature adjustment work, such as the use of increased ventilation before and after noon, timely release of air in the morning and evening. Normally, the temperature should be controlled at 30°C during the day and 15°C at night. The temperature difference should be controlled at about 10°C to prevent the temperature from being too high and the temperature difference being too small. At the same time, with high humidity, adequate watering, and large soil moisture, the growth rate of stems and leaves can be increased. Therefore, vegetable watering must be scientific and reasonable, pay attention to pouring small water, avoid flooding, so as to avoid causing excessive soil moisture, there are leggy phenomenon.

In addition, the plant growth was accelerated after the membrane was changed, so that the vines were pruned early and the air permeability between the plants was improved. After the film is changed, the growth rate of the vegetables is accelerated, and the chaos phenomenon that the pruning does not promptly cause the vegetable stems in the shed to climb up can cause chaos in the future management, and the plants are shaded each other, which may easily cause field canopy closure. In addition, stems are also susceptible to adventitious roots and further infected with soil-borne diseases. At the same time, the lower leaves are susceptible to aging, yellowing, and rot. Therefore, it is recommended that the vines be pruned as early as possible. After the general vegetable pruning is completed, a primary protective agent can be used to spray azoxystrobin and agro-streptomycin or ningnanmycin to ensure that the fungal, bacterial, and viral diseases can be prevented simultaneously.

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