How to safely survive the winter of vegetables in open field

Nitrogen control? 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 old and healthy. Before low temperature, quick-acting nitrogen fertilizer should not be applied, but phosphorus and potassium fertilizer should be applied once to enhance cold resistance.

Apply organic fertilizer? Warm farm manure, such as pig and cow manure or soil fertilizer, should be cultivated in the rhizome of vegetables. Fertilization should be carried out on a sunny day, applying 1000kg to 1500kg per mu.

Dung method? Before the frost, 400 kilograms and 500 kilograms of thin dung water was poured per mu to make the soil not easy to freeze.

Soil cultivation? The combination of ploughing before freezing and the cultivation of roots with crushed soil can loosen the soil, increase the soil temperature, and directly protect the roots. However, the cultivation of soil should be carried out before the soil is frozen, and the suitable depth is 7 cm to 10 cm.

Coverage? In the afternoon before the frost, cover the vegetable beds and vegetables with straw and straw. 100 kg of straw per mu should be sparse and scattered. Do not cover all the vegetables to avoid affecting photosynthesis.

Scatter ashes? Sprinkle a thin layer of husk ash or plant ash on vegetables before low temperature freezing injury; spread grass ash between rows.

Smoking? Pile up with weeds, straw, litter, etc., and light smoke at the edge of the wind before the frost, which can dispel the cold current.