Two major factors lead to greenhouse strawberry deformity

According to investigation and analysis, there are three main reasons for abnormal fruit. Corresponding countermeasures can be taken to prevent the occurrence of abnormal fruit. Low room temperature is a common cause of malformed fruit. The optimum temperature for strawberry growth and development is 20-25℃. The lowest temperature during flowering and fruiting period should not be lower than 5℃. If the temperature is below 5℃, the growth and pollination of strawberry will be seriously affected, and abnormal fruit will appear, which will have a great impact on yield and quality. The preventive measures are to take corresponding insulation measures: Thickening the thickness of the north wall of the greenhouse; before the cold current comes, covering 4 layers of kraft paper under the straw cover can increase the room temperature by 4℃. At the same time, a small arch shed can be built in the greenhouse, a small arch shed frame can be built on the strawberry bed, a layer of plastic film with a width of 90-100 cm is covered on the top, the lower end of the plastic film is buried in the soil for compaction, and the temperature in the small arch shed can be increased by about 4 DEG C. If there are conditions, it is better to install electric furnace or electric heating wire in the shed. The above measures can ensure that the indoor temperature is above 5℃. Poor pollination is an important cause of abnormal fruit bearing. In the cold season, even if the room temperature is higher than 5℃, strawberries often bear abnormal fruits due to poor pollination. The reason is that in cold season, the outdoor temperature is low, the greenhouse vent is small, the ventilation time is short, the greenhouse is in a windless state, the outside is in cold season, no insects enter the room, strawberries cannot be pollinated by wind and insects. The prevention strategy is artificial or bee pollination. Strawberries usually take 4 to 5 days from flowering to flower dropping. During flowering, brush can be used for artificial pollination. Artificial pollination flowers not only drop flowers quickly, that is, a day to drop flowers; and rapid flower drop also reduces nutrient consumption, so that nutrients concentrate fruit, fruit development is fast, fruit growth is large, yield is high, mature 7 days to 10 days earlier effect. If there are conditions, the effect of bee pollination is better than artificial pollination, and a lot of artificial pollination can be saved. The imbalance of water and fertilizer supply and demand is another important reason for abnormal fruit. Indoor soil is too dry, too wet, lack of fertilizer or improper fertilization, it will cause water and nutrient supply imbalance, resulting in poor fruit development and the formation of abnormal fruit. When moisture content is insufficient, small water should be poured in time. If lack of fertilizer, should be combined with watering for topdressing. Should increase phosphorus, potassium fertilizer, do not apply ammonium bicarbonate, should apply ternary compound fertilizer, 15-20 kg compound fertilizer per mu. After the chemical fertilizer is dissolved with water, the effect of perforating and topdressing is better. If the moisture content is insufficient after topdressing, it should keep up with watering, so as to promote fertilizer with water, so as to meet the needs of normal flowering and fruiting of strawberries and prevent the occurrence of abnormal fruits.