Variable temperature management: After the grass is opened in the morning, the air is vented for half an hour, then the shed is closed, and the temperature of the shed is quickly mentioned above 28 °C. When the temperature rises to 30 °C, it starts to put a small wind. In the morning, the temperature is controlled at 28 °C ~ 32 °C. If the shed temperature continues to rise in the afternoon, the amount of air can be increased and the temperature can be lowered to 20 °C ~ 25 °C. After entering the night, the temperature was controlled at 18 °C ~ 20 °C in the first half of the night, and the temperature was controlled below 14 °C in the middle of the night.
Watering at the right time: Watering at the right time according to the weather, soil moisture and seedlings. The watering time should be chosen in the sunny morning, but the water can be poured in small water. Immediately after watering, the chamber was closed, the temperature was raised to 32 ° C, maintained at this temperature for 1 hour, and then the air was drained.
Improve cultivation conditions: Greenhouse should try to use no drip film. No drip film has good light transmission, can avoid condensation of the shed film, improve the temperature inside the shed, and reduce the humidity inside the shed. It is also possible to hang a reflective curtain on the back wall of the shed to enhance the light in the shed and increase the temperature inside the shed. In addition, hay can be laid between rows to avoid evaporation of soil moisture and reduce humidity in the shed.
High temperature shack: After entering April, if you find a diseased plant, you can choose a sunny day in the morning to close the shed, and raise the temperature to 45 °C for 2 hours to kill the bacteria in the shed. In order to prevent the occurrence of downy mildew, the shed can be swelled once a week, and the wind is released after the shed, and the amount of air is small and large. It should be noted that the day before the shack must be watered.
Nutritional control: After the cucumber enters the middle and late growth stages, the growth of the cucumber is obviously weakened, and the nitrogen content in the juice of the plant is decreased. In this case, the plant is most prone to downy mildew. At this time, the nitrogenous liquid can be sprayed on the foliar surface to supplement nutrition. The nitrogen sugar solution can be prepared by using white sugar, urea and water in a ratio of 1:0.5:100, spraying once every 5 days, and spraying 5 times.
Cultivate strong seedlings: It is best to use wild pumpkin grafting to raise seedlings. The cucumber roots grafted with this pumpkin seedling are developed, have strong resistance to stress, and are less prone to downy mildew.
In addition to the above measures to prevent downy mildew, every morning should be carefully observed in the field, and immediately after the diseased leaves are found, take control measures to eliminate the disease in the bud.
Watering at the right time: Watering at the right time according to the weather, soil moisture and seedlings. The watering time should be chosen in the sunny morning, but the water can be poured in small water. Immediately after watering, the chamber was closed, the temperature was raised to 32 ° C, maintained at this temperature for 1 hour, and then the air was drained.
Improve cultivation conditions: Greenhouse should try to use no drip film. No drip film has good light transmission, can avoid condensation of the shed film, improve the temperature inside the shed, and reduce the humidity inside the shed. It is also possible to hang a reflective curtain on the back wall of the shed to enhance the light in the shed and increase the temperature inside the shed. In addition, hay can be laid between rows to avoid evaporation of soil moisture and reduce humidity in the shed.
High temperature shack: After entering April, if you find a diseased plant, you can choose a sunny day in the morning to close the shed, and raise the temperature to 45 °C for 2 hours to kill the bacteria in the shed. In order to prevent the occurrence of downy mildew, the shed can be swelled once a week, and the wind is released after the shed, and the amount of air is small and large. It should be noted that the day before the shack must be watered.
Nutritional control: After the cucumber enters the middle and late growth stages, the growth of the cucumber is obviously weakened, and the nitrogen content in the juice of the plant is decreased. In this case, the plant is most prone to downy mildew. At this time, the nitrogenous liquid can be sprayed on the foliar surface to supplement nutrition. The nitrogen sugar solution can be prepared by using white sugar, urea and water in a ratio of 1:0.5:100, spraying once every 5 days, and spraying 5 times.
Cultivate strong seedlings: It is best to use wild pumpkin grafting to raise seedlings. The cucumber roots grafted with this pumpkin seedling are developed, have strong resistance to stress, and are less prone to downy mildew.
In addition to the above measures to prevent downy mildew, every morning should be carefully observed in the field, and immediately after the diseased leaves are found, take control measures to eliminate the disease in the bud.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Vinyl Floor,Flooring Wood,Pvc Flooring Plank,Wood Pvc Flooring
DONGYANG MAOSHENG PLASTIC CO.,LTD , https://www.maoshengflooring.com