The latest methods of overwintering crops

Every year, with the arrival of winter, the temperature drops and the weather is cold. If there is a slight carelessness in the process of grain cultivation, frost injury will occur, affecting the yield after the beginning of spring. In order to prevent grain from frost injury in the process of overwintering, several methods are introduced to prevent frost injury, which can be adopted by farmers according to the actual situation.

I. wind barrier method

The method is to make a 1-1.5-meter-high wind barrier with straw adjacent to the vegetable bed, and set up a wind barrier every 3-4 borders.

II. Coverage method

In the afternoon before the frost, covering vegetable beds and vegetables with straw and straw can reduce the mechanical damage caused by wind-cold, with 100 kg of straw per mu. To be sparse and scattered, do not cover all the vegetables to avoid affecting photosynthesis.

Third, winter irrigation method

Irrigation before frost can increase the temperature by 2 ℃ ~ 3 ℃ after the cold spell.

IV. Soil cultivation method

The combination of intermediate ploughing before freezing and the cultivation of roots with broken soil can loosen the soil, increase the soil temperature, and directly protect the roots, but the cultivation of middle tillage should be carried out before the soil is frozen, and the suitable depth is 7cm to 10cm.

5. Trenching and drainage method

Open the "three ditches" well to ensure the smooth flow of ditches, ditches and fields, so as to remove frozen water in time.

VI. Ash scattering method

One is to spread a thin layer of plant ash on the vegetables before the low temperature freezing injury, and the other is to spread grass ash between the rows.

7. Applying organic fertilizer and spraying nutrient solution

Using heat preservation farm manure such as pig and cow manure or soil manure before frost and culturing in the rhizome of vegetables can increase the soil temperature by 2 ℃ ~ 3 ℃. Topdressing should be carried out in sunny days, 1000kg to 1500kg per mu. At the same time, "Yunda 120" brassine, green Fenwei, Aiduoshou and other plant nutrient solutions were sprayed to improve the cold resistance of the plant.

VIII. Smoking method

With weeds, straw, withered branches, fallen leaves and other stacked around the vegetable field, before the arrival of frost in the wind in the corner of smoke, can dispel the cold current. But burn-proof vegetables are prohibited.

IX. Nitrogen control method

Properly reduce the amount of nitrogen fertilizer in the seedling stage, must not partial application of nitrogen fertilizer, so as to avoid poor cold resistance of the plant. Topdressing should be done early to make the vegetable seedlings strong. Before the arrival of low temperature, do not apply available nitrogen fertilizer, it is appropriate to apply phosphorus and potassium fertilizer once to enhance the cold resistance of vegetables.

Although there have long been folk proverbs such as "auspicious snow heralds a bumper year" and "winter is cold and autumn is fruitful", in fact, the work of preventing cold in winter must not be taken lightly. Auspicious snow and winter cold can freeze to death of overwintering pests. However, as the saying goes, "things will turn to the extreme". If not prevented and controlled, the cold weather will also freeze the overwintering crops, so it is particularly important to prevent the occurrence of frost damage.