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With the advent of cold spring, scientific methods should be taken to protect early rice

DailyBird Culture 2021-10-08 1 0

late spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring, but the temperature is low in the late spring. When the late spring cold strikes, the temperature changes greatly, and the people with weak physique are easy to feel unwell. At the same time, agricultural production may also be affected. Let's understand, How to scientifically protect early rice crops from damage when the late spring cold comes.

倒春寒来临如何科学保护早稻

agricultural experts pointed out that because of China's vast territory, different climates, different crops and different values of meteorological factors affecting crop growth, each place has different definitions of late spring cold, and corresponding adjustments should be made according to local climate and crops, while "late spring cold" is commonly used in agricultural production in the south Meteorological indicators refer to the daily average temperature falling below 12 ℃ for 3-5 days. So what are the effects of "late spring cold" on early rice crops?

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rice are usually planted around March of the lunar calendar. Farmers' friends began to buy seeds in the first ten days of February before that, and then sow them. It looks like half a month. When the rice grows to about 20 cm, it can be separated and planted in the field. If there is a "late spring cold" during the growth of the most important crops, we have to make farmers' friends vigilant and pay attention to the maintenance of their own rice. Because the cooling range of "late spring cold" is relatively large, which is very unfavorable to the growth of rice. If the preventive measures are not appropriate in the sowing and seedling raising stage, it will make the "late spring cold" empty, resulting in the phenomenon of rotten rice planting and rotten seedlings.

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experts suggest that corresponding measures can be taken to prevent "late spring cold" in agricultural production. Early rice seedling raising can be covered with greenhouse film. At present, there are two main methods of early rice planting, one is to sow directly in the field, the other is to raise seedlings in small fields first, and then transplant the seedlings to the field. When

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and "late spring cold" arrive, if early rice is still in the seedling raising period, it is necessary to strengthen the early rice seedling raising shed film. If conditions permit, it can be covered with double film heat preservation and seedling protection, which not only plays a role in heat preservation and cold resistance, but also makes the rice grow faster because the temperature is appropriate; At the same time, phosphate fertilizer shall be sprayed properly before cooling to enhance the stress resistance of rice seedlings and prevent rice seedlings from rotten seeds and seedlings caused by cold air. For

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direct seeding early rice, defensive measures should be taken according to local conditions. For those that have not been soaked, sowing should be postponed to avoid rotten seeds and seedlings caused by low temperature, overcast and rain; The rice seeds that have been soaked and sprouted but have not been put into the field should be thinned and dried, and the "cold tail and warm head" should be sown in time when the weather improves; The drainage of sown rice fields should be strengthened to prevent long-term flooding from causing rotten roots and buds; The rice field with seedlings should be properly irrigated to protect the seedlings during the period of low temperature, overcast and rainy.

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