The necessary conditions for seed germination are moisture, air, temperature, and light.
1. Moisture and air: The amount of water in the germination bed is determined according to the characteristics of the germination bed and the seed. For example, adding water to the sand bed is 60%-80% of its saturated water content. For example, if the paper bed is used, the excess water can be drained. If the soil is used as a germination bed, add water to the soil and stick to the soil. It is advisable to crush it with a gentle pressure. The germination bed must be kept moist during germination. During the germination, there should be enough air around the seeds to pay attention to ventilation.
2. Temperature: When the temperature is suitable, the seeds germinate normally, and the temperature is too high and too low to be unfavorable for seed germination. The temperature required for germination of different crop seeds is different. Generally, the temperature of the summer crop seeds is 20-30 ° C, and the winter crop seeds are required to be 20-25 ° C.
3. Illumination: Seeds of most crops can germinate under light or dark conditions, but generally use light. If germination is carried out under variable temperature conditions, the light should be carried out at a high temperature of 8 hours.
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