How to prevent freeze damage to weak wheat seedlings? Master these five techniques
Five techniques for preventing freeze damage to weak wheat seedlings
(Agricultural Wealth Network) Hilling and topdressing Because weak wheat seedlings have few overwintering leaves and few secondary roots, they are prone to freeze damage. From late December to early January of the following year, in combination with intertillage loosening of the soil and earthing up around the roots, apply 2500 kg of organic fertilizer, or apply 20~25 kg of phosphorus and potassium fertilizer.
Covering with cattle and horse manure Covering weak wheat seedling fields with cattle and horse manure can both raise soil temperature and protect the roots, and promote root growth, improving fertility for wheat growth in the following spring. The method is: crush the cattle and horse manure fine, spread it over the wheat seedlings, with a thickness of 2~3 cm being suitable. Before the wheat turns green again in the following spring, in combination with shallow hoeing, use a bamboo rake to pull the cattle and horse manure into the middle of the wheat rows.
Irrigating with freezing water Irrigating with freezing water can stabilize soil temperature, settle the soil, break up clods, and avoid air leaks that freeze the roots; it promotes the formation of strong tillers before winter and enhances the cold resistance of the wheat seedlings. Irrigation should be carried out when the daily average temperature is 2°C~4°C. The water volume should not be too large, and the water flow should not be too forceful, so as to avoid mud accumulating and burying the seedlings. After irrigation, shallow hoeing should be done in time to prevent soil compaction.
Mulching the wheat field "A layer of grass on the ground prevents freezing, preserves water, and suppresses weeds." After winter irrigation and fertilization, spread a layer of grass or wheat chaff between the rows of the wheat field, which helps prevent wind, prevent freezing, preserve heat, and preserve moisture, and prevents excessive growth in the following spring. Wheat straw, rice straw, and others can all be chopped and used as mulch. After mulching, scatter soil on top to prevent strong winds from blowing it away. After spring begins, rake the mulch out of the field.
Smoking to create fog When frost comes, damp firewood and grass can be lit around the wheat field to create smoke, reducing heat radiation from the wheat field to the outside and effectively reducing freeze damage.
Covering with cattle and horse manure Covering weak wheat seedling fields with cattle and horse manure can both raise soil temperature and protect the roots, and promote root growth, improving fertility for wheat growth in the following spring. The method is: crush the cattle and horse manure fine, spread it over the wheat seedlings, with a thickness of 2~3 cm being suitable. Before the wheat turns green again in the following spring, in combination with shallow hoeing, use a bamboo rake to pull the cattle and horse manure into the middle of the wheat rows.
Irrigating with freezing water Irrigating with freezing water can stabilize soil temperature, settle the soil, break up clods, and avoid air leaks that freeze the roots; it promotes the formation of strong tillers before winter and enhances the cold resistance of the wheat seedlings. Irrigation should be carried out when the daily average temperature is 2°C~4°C. The water volume should not be too large, and the water flow should not be too forceful, so as to avoid mud accumulating and burying the seedlings. After irrigation, shallow hoeing should be done in time to prevent soil compaction.
Mulching the wheat field "A layer of grass on the ground prevents freezing, preserves water, and suppresses weeds." After winter irrigation and fertilization, spread a layer of grass or wheat chaff between the rows of the wheat field, which helps prevent wind, prevent freezing, preserve heat, and preserve moisture, and prevents excessive growth in the following spring. Wheat straw, rice straw, and others can all be chopped and used as mulch. After mulching, scatter soil on top to prevent strong winds from blowing it away. After spring begins, rake the mulch out of the field.
Smoking to create fog When frost comes, damp firewood and grass can be lit around the wheat field to create smoke, reducing heat radiation from the wheat field to the outside and effectively reducing freeze damage.