What should rice seedlings do if it is cold in late spring?

Spring is the period of rice planting, but the cold in late spring is often inevitable, which will affect the seedling emergence and growth of rice, and bring inestimable losses to farmers. So what should rice seedlings do when it is cold in late spring? Let's take a look at the detailed introduction.

1. Sowing seeds at the right time

In order to prevent the cold in late spring, the sowing time must be well controlled. Generally, when the air temperature is 5-6 degrees, the bed temperature is 12 degrees, and the soil is thawed more than 20 centimeters, you can sow seeds. Therefore, when sowing, we must pay attention to the weather forecast, avoid low temperature, overcast and rainy weather as far as possible, and choose a sunny time to sow seeds when the average temperature is more than 10 degrees and the minimum temperature is not less than 5 degrees. At the same time, it is necessary to prepare for seed soaking and sprouting so that the seeds can emerge as soon as possible.

2. Flat mulch film

After sowing and covering the soil, plastic film should be laid flat, which can increase the ground temperature by 1-2 degrees and greatly alleviate the effect of low temperature caused by late spring cold. this method is often used in northern cultivation and seedling cultivation, and the effect is good. In general, when the temperature is not lower than 5 degrees at night, there is no need to take additional heat preservation measures, pay attention to the weather forecast, and cover grass to keep warm when it is found that there is a cold current. After the seedlings are unearthed and when the temperature is too high, the plastic film should be removed in time, so as not to affect the normal growth of the seedlings.

3. No watering before the second leaf

When raising seedlings in dry fields, watering is prohibited before the second leaves of seedlings are watered thoroughly, because watering in this period will reduce the ground temperature and be disadvantageous to the growth of seedling roots. Once the temperature is too low, the root system will freeze, which makes the roots of seedlings fragile and easy to be infected with diseases in the later stage. Cultivating strong seedlings becomes an extravagant hope.

4. Adjust the temperature with water

If we encounter the phenomenon of late spring cold during the transplanting period, we can protect the seedling bed in deep water when the late spring cold is coming. Irrigation can raise the water level, increase the ground temperature, protect the roots of seedlings and make them grow safely. The height of irrigation should be operated flexibly according to the seedling age, and the water level should be lowered after the cold in late spring.

The above is the introduction of rice seedlings in case of late spring cold, hope to help you, want to know more related knowledge, please pay attention to us.