In early autumn, in order to improve the quality and yield of vegetables, in addition to adopting shade net cooling and increasing ventilation, it is also possible to regulate the growth of vegetables by cooling water. Water is used to supplement the water lost by evaporation at high temperatures to meet the vegetable's need for moisture while reducing the temperature inside the shed.
Watering time
It is best to start watering in the morning, and do not pour it after 9-10 when the sunlight is particularly strong. As the temperature rises, evaporation of the moisture will take away the heat in the field, making the temperature in the shed relatively lower than 3-5°C. Watering time should be 3-4 days, once, ridge pouring (size alternately poured), the amount of watering not too much. The principle is to increase the number of watering and reduce the amount of watering.
Timely fertilizer
According to the amount of vegetable growth and product harvested to determine the type and quantity of topdressing. Fruits and vegetables in the picking period should be topdressed with medium-nitrogen, low-phosphorus, high-potassium, water-soluble fertilizer, with 15-20 kg per mu. When water is taken in the ditch (rows), water can be added to topdressing fertilizers. Take a clean water, a fertilizer, a small number of methods. In addition, do not pour rainwater into the shed when it rains heavily. If it is a large shed that has been removed from the shelter film, drain it in time after the rain and dig the drainage ditch in front of the shed or on one side of the shed.
The growth of vegetables is fearful of flooding, especially at high temperatures. If a sudden thunderstorm (commonly known as hot rain) occurs, besides the timely discharge of radon, be sure to pour well water again after the hot rain. This is because the well water is relatively cool. By pouring well water, the surface heat can be reduced, and at the same time the ground panel knots can be reduced. This is the so-called "casting garden". It is particularly important for melons and solanaceous vegetables, followed by green onions. For onions and leeks, it is more likely to cause dead trees after a locust plague, commonly known as “chemical seedlingsâ€. In other words, after a heavy rain, it must be drained in a timely manner, and the conditions should be used to carry out the pouring of water. There is no condition to drain the rainwater that has passed. For lands without drainage conditions, digging earth pits on one side of the ground will serve as a temporary drain, which will have a certain effect on mitigating flood damage.
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