How to cultivate strong seedlings of melons and fruits in winter?
Winter is the nursery period for melon, watermelon and tomato. The so-called strong seedling refers to the strong growth of the whole plant, the developed root system, especially the capillary heel, thick stalk and thick green leaves.
Today we will talk about how to cultivate strong seedlings.
Temperature management
After sowing, find a way to keep warm, and keep it at a temperature of about 30 degrees, otherwise the emergence of seedlings will be slow. Remove the base film in time after emergence, and cover the place where there is no emergence with a small piece of film. Ventilate and cool down, keep the temperature at 15 degrees during the day and 15-16 degrees at night.
Ventilation and cooling is to prevent the emergence of tall seedlings. About 15 days after sowing, the temperature in the shed during the day is maintained at about 30 degrees, which can promote growth and development.
Moisture management
Whether the seedlings grow well or not, watering is very important. Here are three principles of watering, that is, look at the sky, the ground, and the seedlings.
To see the sky is to choose to water on a sunny day. Do not water on cold, rainy or cloudy days. If it is too dry, you can sprinkle a layer of damp fine soil to ease it. Wait until after the rain or the cold. After each watering, ventilate the water to make the leaves dry and reduce the occurrence of diseases.
To look at the ground is to look at the soil on the bed. Note here that you must dig down an inch deep and look around. Loose soil on the bed means water is lacking. If you can hold it with your hands, it means there is no shortage of water. Remember to pour thoroughly. .
Seeing the seedlings means that the seedlings can be watered at noon when they are wilting. They can be watered if they are not wilted. The small plastic arch shed raises the seedlings. Water more in the middle of the bed and less water around; watering should use a fine-eye pot to prevent the seedlings from being knocked down, and to prevent rainwater from entering the bed. , The seedbed can only be watered, not water.
Remind everyone that the seedlings in greenhouses and greenhouses should be watered before 7~8 in the morning, and the seedlings in the small arch canopy are usually watered before 10 in the morning. Watering in the afternoon or evening is not allowed because the watering bed temperature in the evening Decrease, the air humidity increases, there are water droplets on the stems and leaves of the seedlings, and the germs are easy to infect the seedlings and get sick. For watering, choose to use clean tap water for 1 to 2 days instead of water from the pond.
Ventilation management
The purpose of ventilation is to adjust the temperature and humidity in the bed, control the seedlings and prevent excessive growth. The seedlings are generally not ventilated before they are unearthed. If the bed is overheated, it is necessary to add a few grass curtains to shade the seedlings. The principle of letting out the wind is to start small and increase gradually. When letting out the wind, let it go down the wind. The wind outlet can also be covered with grass curtains to prevent cold wind from blowing directly on the seedlings.
Other management
After each watering at the initial stage of nursery seedlings, when there are no drops of water on the seedlings, sprinkle about 1 mm of nutrient soil on the seedling bed, which can protect moisture and prevent cracks. After covering the soil, spray water with a sprayer to wash it away. Affect photosynthesis.
In order to promote growth, spray fertilizer on the leaves every 7 to 10 days, generally using fertilizer that promotes the rooting of seedlings.
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