What about the deformity of strawberries planted in the greenhouse?

What about the deformity of strawberries planted in the greenhouse? Please guide the main reasons for strawberry malformation: low room temperature is a common cause of deformed fruit. The optimum temperature for strawberry growth and development is 20 ℃ ~ 25 ℃. The lowest temperature in flowering and fruiting stage should not be lower than 5 ℃. If the temperature is below 5 ℃, it will seriously affect the growth and pollination of strawberry, easily lead to abnormal fruit, and have a great effect on yield and quality. The preventive measures are to take corresponding heat preservation measures: before the cold spell comes, small arched scaffolding can be built on the strawberry bed, which can be covered with a layer of plastic film 90 cm 100 cm wide; thermal insulation materials such as straw curtain or old agricultural film or double-layer sunshade net can be covered outside the apron of the greenhouse; electric lights or hotlines can be installed in the shed where conditions permit, for better warming effect. The above measures can ensure that the indoor temperature is above 5 ℃. Poor pollination is an important cause of abnormal fruit. In the severe cold season, strawberries often bear abnormal fruit due to poor pollination even if the room temperature is higher than 5 ℃. The reason is that in the cold season, the outdoor temperature is low, the greenhouse vent is small, the release time is short, the greenhouse is in a windless state, the outside is in the cold season, no insects enter the room, strawberries can not be pollinated with the help of wind and insects. The preventive measure is artificial pollination or bee pollination. Strawberries usually take 4-5 days from flowering to falling. During flowering, artificial pollination can be carried out with a brush, or assisted by blowing or fan pollination. Artificially pollinated flowers fall quickly (falling flowers in one day), which can reduce nutrient consumption and speed up fruit development. The fruit of artificial pollination has large growth and high yield, and the ripening period can be 7-10 days earlier. At present, the effect of honeybee pollination is better than artificial pollination, and can save a lot of manpower, but under the condition of too low temperature, honeybee activity is less. The imbalance between supply and demand of water and fertilizer is another important cause of abnormal fruit. If the soil in the greenhouse is too dry, too wet, lack of fertilizer or improper fertilization, it will cause the imbalance between water and nutrient supply and demand, resulting in poor fruit development and the formation of deformed fruit. Water should be watered in time when there is not enough moisture. If there is a lack of fertilizer, topdressing should be combined with watering. We should increase the application of phosphorus and potash fertilizer, not ammonium bicarbonate, but ternary compound fertilizer. After the chemical fertilizer is hydrated, the effect of topdressing through eyedropper or drilling is better. If the soil moisture is insufficient after topdressing, it should be watered in time to promote fertilizer with water, so as to meet the needs of normal flowering and fruiting of strawberries and prevent the occurrence of deformed fruits. Click to get more strawberry planting techniques click to get more fruit planting techniques