Strengthening the management of rice seedlings, preventing the growth of seedlings and improving the quality of seedlings is the key to high yield of rice. However, the current causes of rice seedlings are mainly due to the following reasons:
First, the seedlings are ventilated late and the ventilation is not enough
Normal seedling ventilation should be a small wind after emergence, and the ventilation should be gradually increased as the age becomes larger or the temperature rises. Ventilation should also be carried out when the temperature outside the shed is more than 20 degrees before the emergence. In the seedbed ventilation control temperature, the seedlings are ventilated. Before the seedlings are 2.5 leaves, the shed temperature is controlled below 30 degrees. After 2.5 leaves, the control is below 25 degrees. Before the transplanting, there should be 3-5 days of large seedlings. However, now more than 90% of the farmers, when the seedlings 1 leaf 1 heart or 2 leaves 1 heart began to ventilate, which leads to the growth of the seedlings, the internodes are too long, the quality of the seedlings is reduced, and the low-node tillers are weakened or lost.
Second, the seedlings are watered
Rice seedlings are mainly rooting, dry long roots, wet long leaves, controlling the number of waterings. When the morning sun comes out, it is necessary to water the water when the leaves of the seedlings are not dewed, and it is best to be poured in the morning. Nowadays, rice farmers are generally watering and working, watering is impervious, and they are used to watering at night. This will lead to the growth of the seedlings and the poor development of the root system.
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