Experienced vegetable growers often encounter problems with shed vegetable madness, which is not conducive to flowering results and affects yield. For example, the cucumber grows wildly, and the leaves are thick, the stems are square, and the female flowers are few, which does not achieve the purpose of early maturity and high yield. The main reason for the susceptibility to madness in greenhouse vegetables is caused by high humidity in the shed, excessive nitrogen fertilizer, and untimely flowering. In order to make greenhouse vegetables in specific microclimate conditions, vegetative growth and reproductive growth are coordinated, and more flowers and more results, to prevent the emergence of madness, the management should pay attention to the following points.

First, reduce the humidity inside the shed. The humidity in the greenhouse is too high or too low, which is not conducive to the normal growth and development of vegetable crops. High temperature and high humidity are the most prone to plant growth, weak resistance, and easy to cause pests and diseases. High humidity and low temperature are easy to induce roots, plant frostbite and so on. Therefore, measures must be taken in the greenhouse to properly regulate temperature and humidity. In the management, it is reasonable to water the water, avoid flooding with large water, generally use small water to groove the water, and change the water irrigation to drip irrigation under the membrane. Watering in greenhouses in winter should be carried out on sunny days in the morning. Watering should not be done on rainy days or afternoons to prevent sudden increase in humidity in the shed. Different types of vegetables, the humidity requirements during growth vary, such as the appropriate relative humidity of the tomato growth of 60% ~ 70%, cucumber 70% ~ 80%. When the relative humidity of the air in the shed exceeds this standard, measures should be taken to ventilate and dehumidify, otherwise it will be unfavorable for vegetable growth.

Second, keep the temperature inside the shed. The vegetables grown in the shed have a suitable temperature range suitable for their own growth, and too high and too low growth and development will be affected to varying degrees. Plant greenhouse vegetables in advance to understand the normal temperature conditions for the normal growth of vegetables, such as pepper germination temperature is 30 ° C ~ 45 ° C, growth suitable temperature during the day is 26 ° C ~ 30 ° C, night is 18 ° C ~ 22 ° C, below 15 ° C Temperature seeds cannot germinate and flowering cannot be fertilized. In the cultivation, the temperature of the greenhouse must be kept at 20 ° C ~ 25 ° C, below 18 ° C can not grow normally. Tomatoes are high temperature, and the optimum germination temperature is 25 ° C ~ 30 ° C. The suitable growth temperature is 27 ° C during the day and 17 ° C during the night. The lower limit temperature during cultivation is 10 °C, the optimum temperature is 28 °C, and the maximum temperature should not exceed 38 °C. Celery is cool, the growth temperature of the demand is 20 ° C ~ 22 ° C during the day, 15 ° C ~ 18 ° C at night, the temperature difference between day and night is 4 ° C ~ 5 ° C. The ground temperature requires 18 ° C ~ 20 ° C, the minimum can not be lower than 3 ° C ~ 6 ° C. In the later stage, it is not lower than 6 ° C ~ 8 ° C, otherwise it will not grow normally. Cucumber has strict temperature requirements. Suitable temperature is 24°C~26°C during the day, 14°C~15°C at night, and the lower limit of low temperature is 10°C~12°C. The temperature will stop growing below 10°C, and the root system above 30°C. The activity will be weakened and the leaves will shrink. The seedling growth period can not be lower than 18 ° C, the lowest temperature is 20 ~ 23 ° C.

Third, the flower and fruit. After the results of the solanaceous vegetables, the vegetative growth will be controlled, so try to make the plants more fruit. Various growth regulators can be used in time to increase the fruit setting rate, allowing nutrients to continuously supply fruit growth and control, and control the growth of vegetables.

Fourth, scientific fertilization. Due to the temperature and humidity conditions, the vegetables in the greenhouse are better than the vegetables in the open field. The growth of vegetables is accelerated. Generally, in the case of applying the base fertilizer, it is not appropriate to apply top dressing in the early stage of growth. In particular, it is not possible to apply too much nitrogen fertilizer, otherwise it is more prone to madness and increase. Both production and quality have an adverse effect. After the tomato is placed in the third and fourth gears, it can be applied in a proper amount; the cucumber should be applied at the peak of the second fruiting, that is, when the mango vine exceeds the bamboo raft, apply some fertilizer. Cabbage vegetables should pay attention to, can not only apply nitrogen fertilizer, should be combined with enough phosphorus and potassium fertilizer to promote multiple fruit set, have a significant effect on preventing madness. In addition, greenhouse vegetable fertilization requires a combination of underground topdressing and foliar application to promote the steady growth of vegetables. In winter shed indoor vegetables are prone to the lack of calcium, boron, iron, manganese and other elements, the use of spraying trace elements to increase production. Calcium deficiency in cucumber is easy to cause bald and rotted piles, and 0.3%~0.5% calcium chloride or 2% calcium perphosphate leaching solution can be sprayed on the leaves; 0.3% ferrous sulfate can be sprayed on the leaves when the tomato is deficient in iron; Spray 0.2%~0.3% borax solution plus 0.3% quicklime; when manganese is deficient, spray 0.2%~0.3% manganese sulphate or manganese chloride on the foliar surface, spray 30~50 kg solution per acre to supplement trace elements The fertilizer effect is obvious, which promotes the healthy growth of vegetables and does not form a madness and affects the yield. (Li Cuiying)