In the spring season, the temperature is high and low, and vegetables in the greenhouse are prone to various problems at this time. For example, the yellowing of eggplant leaves is severe, the fruit is slowed or the fruit is “skinnedâ€, and the pepper is deformed. How to effectively manage these problems? Let's take a look at the following.
First, control temperature coordinated growth
The importance of temperature to vegetables is reflected in the growth and development of vegetables. Therefore, the temperature management in greenhouses should be close to three points. The first is to adjust the temperature of the greenhouse to the suitable temperature for vegetable growth, and to ensure that the temperature of the vegetables in the greenhouse is maintained at the lowest temperature and the highest temperature range. Let the vegetables grow normally. The second is to control the temperature difference between day and night. The appropriate temperature difference between day and night can prevent prolongation, promote plant growth and robustness, optimize flower bud differentiation, and reduce the occurrence of viral diseases. Finally, the temperature of the vegetables should be effectively controlled at different stages. For example, the temperature of the cucumber seedlings should be lowered during the period of prevention.
Second, a reasonable supply of water and fertilizer
Spring watering is mainly based on weather changes, avoiding watering on cloudy days, so as not to cause the ground temperature to drop, causing the vegetable roots to die, causing the greenhouse air humidity to increase, leading to disease occurrence and spread. Advocating gully ridges and ridges, it is best to drip irrigation, not flood irrigation, watering by alternate watering, watering twice, watering once, and rotating irrigation to avoid lowering ground temperature and poor permeability. Growth and nutrient absorption.
Third, increase lighting to increase production
Dust and smog weather often occur. When it is easy to cover dust on the spring shed film, the transparency of the shed film is reduced, resulting in a slow increase in shed temperature, a decrease in leaf photosynthetic accumulation, and an effect on the color change of the tomato fruit. Therefore, it is recommended that the vegetable farmers often wash the shed film and improve the transparency of the shed film, so that even if it is cloudy, it can increase the light in the shed and promote high yield.
Timely removal of old leaves can also increase light, reduce leaf obstruction, increase leaf photosynthetic area, promote organic matter accumulation, and at the same time increase ventilation and light transmission in the shed, reducing the incidence of disease.
Fourth, reduce humidity, prevent disease early
Reduce the humidity of the air in the shed and suppress the occurrence of diseases. Commonly used methods of dehumidification include heating and dehumidification, releasing moisture, covering the mulch, and pouring small water under the membrane. Reduce the source of bacteria, timely remove diseased leaves, diseased fruits, diseased branches, and carry out deep burial outside the shed to reduce the source of bacteria in the shed, combined with spraying + supplementation of trace elements to prevent the occurrence and reproduction of pathogens.
The above is the management of vegetable cultivation in the greenhouse in the spring. In order to ensure the growth and development of vegetables, various management measures should be in place. In the inter-season of the spring, growers should still be careful to manage.
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