Four conditions for watering crops in greenhouses
The so-called modern greenhouse is to add some temperature, light and humidity that can control the plant growth parameters on the basis of the traditional greenhouse, so as to achieve a very good environment for plant growth, so that the plants can achieve very high yield. Water is indispensable for the growth of crops. Only reasonable watering can ensure the healthy growth of crops in greenhouses and improve products.
Greenhouse watering needs to do:
1. Flexible watering depending on the weather: We need to grasp the principle of "watering more on sunny days and avoid watering on snowy days" according to the weather conditions. When the weather turns from sunny to cloudy, the water volume needs to be gradually reduced. The time can be extended appropriately. If it turns from cloudy to sunny, the water volume can be changed from small to large, and the interval time can be changed from long to short;
2. Watering should be focused: the temperature difference between various parts of the greenhouse is still relatively large, so the amount of watering is also adjusted. The south of the greenhouse and places close to heat sources such as stoves and flues have a large amount of soil moisture evaporation. The amount of watering can also be appropriately increased. The temperature on the east and west sides of the greenhouse and the north is low, and the sunshine time is short, so the amount of watering can be appropriately reduced;
3. The shallow water should not be too large: when the temperature is low, the crops in the shed grow slowly, and the water demand is relatively reduced, so the amount of watering should be small. Remember to flood the water, and it is better to use watering or spraying. On the one hand, low temperature and high humidity cause Crop retting. In the first two days after watering, it is more likely to cause humidity in the greenhouse, so it is necessary to ventilate and cool down reasonably, and place it to induce diseases. Ventilation is appropriate when the temperature is relatively high at noon;
4. The watering time should be appropriate: the watering of the greenhouse should be arranged around noon. During this period, the temperature in the greenhouse is relatively high, and the side effects after watering are relatively small. Avoid watering in the early morning and evening to prevent the vegetables from freezing.
