How to manage the rice seedling period

Management focus

Controlling the stems and leaves of the seedlings and promoting the healthy growth of the root system, so that the seedlings can reach the standard of strong seedlings. The temperature and moisture should be strictly controlled. The temperature of 1 cm below the first height of the seedlings should be controlled at 22～25℃ at the 2-leaf stage, and the highest temperature should not exceed 25℃; at the 3-leaf stage, the highest temperature should not exceed 25℃. The minimum temperature is not less than 10°C.

In this period, more vents should be provided for large-ventilation seedling training. When the humidity in the shed is high, the seedlings should be ventilated when it rains.

It is necessary to grasp the principle of "low temperature is sick, high temperature is terrible". When the sun starts to be sunny after continuous low temperature, open ventilation in advance to prevent bacterial wilt (or wilt disease); high temperature weather should be ventilated early to prevent excessive heat; The leaves of seedlings with low temperature and chilling damage are affected by freezing, so ventilation should be done before 8 o'clock in the morning to alleviate the freezing damage of leaves. During the 2.5-leaf stage of the seedlings, the ventilation will be gradually increased according to the temperature. When the minimum temperature is higher than 10℃, ventilation can be carried out day and night.

Rice wilt is a major disease threatening the rice field. It occurs to varying degrees every year. The mild occurrence causes the seedlings to wither and die, resulting in insufficient seedlings, delays in farming, and affecting rice yield.

However, some farmers did not use the standard amount of medicine in the spraying process, and did not wash the seedlings in time after spraying, resulting in bald seedlings in the seedling bed.

Precautions for rice seedling spraying to prevent diseases:

1. It is strictly forbidden to mix the spray pot, and it must be washed before each use.

2. The seedlings must be washed with medicines that need to be washed, and the seedlings must be washed with anti-disease medicines.

3. The spraying time should be in the morning or evening.

4. Test the spraying speed and the amount of spraying water in advance to ensure the uniformity of spraying.

5. The height of the nozzle should be 70-80cm away from the seedlings to ensure the atomization effect and effectively reduce the phytotoxicity caused by excessive concentration.

6. Prevent heavy spraying and leaking spray.

7. The medicine must be mixed with a standard container, and the dosage must be standard.

8. The amount of water should be sufficient when adding the medicine to prevent the concentration from being too high.

9. When adding the medicine, the mother liquor must be mixed first and stirred evenly.

10. When mixing the medicine, keep the air in a clear place to prevent poisoning.

The life of rice seedlings is relatively fragile. At this time, it is easy to produce diseases or burn to death due to high temperature. Therefore, you should check the condition of the seedlings in time and pay attention to the moisture and temperature of the seedlings.

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