Root cultivation is an important measure throughout the growing season of vegetables. Especially in the low temperature season, the root system can be cultivated to cultivate a strong root group to grow strong plants and obtain high yields. However, in the winter with low temperature and low sunshine, the root system is more delicate. In actual production, some inadvertent improper operations by vegetable farmers often make the root system "scarred". Remind vegetable farmers to avoid root damage caused by the following two points when raising roots:
Avoid water damage
Watering in winter will not only lower the ground temperature, but also increase the humidity in the shed, especially for crops with shallow root systems such as cucumbers and peppers. Once the watering is too large, it is easy to damage the roots and retting the roots. Remind the vegetable farmers to avoid flooding when watering , Conditionally, use drip irrigation under the membrane. Watering time******Before 10 o'clock in the morning every day, there is not much difference between the ground temperature and the water temperature at this time. After watering, the ground temperature will not change significantly, which can reduce the damage to the root system and prevent the occurrence of root explosion.
Avoid fertilizer damage to roots
Generally speaking, two types of fertilizers should be used for fertilization of greenhouse vegetables in winter, one is fully water-soluble fertilizer, and the other is functional fertilizer for root cultivation.
In winter, if the temperature drops or is continuously cloudy, the amount of fertilizer should be appropriately controlled. This is because under low temperature conditions, the physiological metabolism of vegetables is reduced, and the growth and development speed is slowed. Therefore, the amount of fertilizer required is less than that in other seasons, so the amount of topdressing should be appropriately reduced . Excessive fertilization will not only waste fertilizer, but also easily damage roots, causing yellow vegetable leaves and soil salt damage. Functional fertilizers have an outstanding root-growing effect, but due to their low levels of nutrients such as nitrogen, phosphorus, and potassium, simple topdressing of functional fertilizers can easily cause vegetable defertilization. It is recommended to use them in combination with fully water-soluble fertilizers. Satisfy the nutrient needs of vegetables and achieve the purpose of rooting.
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