Wheat antifreeze "cross-headed"

Select the selected varieties and pay attention to the use of local varieties of cold-resistant wheat, such as Lumai 21, 22, Yumai 34, 50, Jinmai 51, 53 and so on. The sowing depth is between 3 and 5 cm.

Appropriate amount of top-dressing For top-fertilized wheat fields before sowing, top dressing before winter can consolidate the effective delivery of wheat and enhance the plant's own ability to resist cold. Nitrogen, phosphorus, and potassium should be mixed after dressing, and the proportion should be appropriate. Phosphorus fertilizers, in particular, have a significant effect on promoting the down-rooting of wheat roots, regulating the nutrients and water needed in plants, and enhancing the cold-resistance of wheat.

Pour over the winter water to pour over the winter water. One depends on the temperature: The daily average temperature begins to pour at 3°C~8°C. Second, look at the situation: When the soil is sand, the relative humidity is less than 60%, the loam is less than 70%, and the clay is watered when it is less than 80%. Three to see the seedlings: wheat seedlings grow well, at the end of the foot or slightly prosperous fields, can be appropriate late pouring or not pouring to prevent the group is too large, too busy. For later sowing late winter wheat, due to short growing time before winter, less roots, weak seedlings, and less tillering, in order to promote the growth and development of wheat seedlings, as long as the bottom pick is still good, but also can not be poured, but it must be timely and securely promoted. Strong root seedlings give birth. Fourth, the amount of water should not be too large.

The cover is the cover dung to prevent the cold. After the winter wheat enters the wintering period, a layer of manure is applied along the ridge (people call it “warm ditch manure”), which can protect the wind, protect the clams, increase the temperature and prevent freezing, and add nutrients to the barley to grow green. In the case of insufficient manure, crops such as late barley, wheat fields in shallow sowing, wheat fields in the sand, and wheat fields sown with weak winter crops must be covered. Covering manure can also use the deep color of organic fertilizers to increase the absorption of solar heat in wheat fields. The thickness of the manure soil is preferably about 3 cm below the soil layer in the tiller section. The soil should be cleared and ridged in the spring in time to encourage the wheat seedlings to return to green growth. Cover manure should be carried out within 10 days after the growth of wheat seedlings ceases.

In the middle of the cultivator, suppression of cultivator suppression can prevent drought and prevent freezing damage. Therefore, it is more important to combine cultivators and winter irrigators in time, especially in clay land. For the late glutinous wheat fields, more cultivator and early cultivator can receive the effect of warming and warming. For the wheat in the hilly drylands, where the wheat fields that have been delivered have to be ploughed in time, the repression should be carried out. For wheat fields whose roots are poor in quality because of poor soil preparation, the roots of wheat crops may be cracked and crushed to make up for the cracks, increase soil compaction, and make the wheat root system in close contact with the soil to improve the cold resistance of wheat. ability. However, salt, sand and wetlands should not be repressed so as to avoid salinity, wind erosion, and hardening.

The splash of winter splashes the urine from the beginning of winter to the vernal equinox, pouring the accumulated human waste directly into the wheat ridge, which not only has a significant effect on preventing the freezing injury of wheat, but also has the effect of nitrogen supplementation. Usually pouring 500 to 800 kg per 667 square meters. However, we must pay attention to saline land should not be poured urine, otherwise it is easy to increase the degree of salinization; there is snow or frost, do not pour urine, otherwise it will reduce the temperature, frostbite wheat seedlings.

Smoke is smoke, smoke, and frost. Smoke is smoky on the night when the frost is about to occur. It reduces heat radiation from the ground and raises the temperature of the ground and foliage to prevent frost.

In the case of freeze-infestation of wheat in the overwintering season, spraying the seedlings with 0.3% to 0.5% of Chlormequat solution can inhibit the growth of plants and prevent or reduce the occurrence of freezing damage.

Supplementary water supplement in early spring When the thickness of dry soil layer in the early spring is more than 3 cm, it is necessary to replenish water in a timely manner to reduce frost damage and reduce the rate of dead seedlings.

After recovery, the remediation of the frozen wheat leaves with frozen leaves and unfrozen young ears should be watered early to prevent the death of young ears. Young ears have been frozen wheat fields, should be accelerated nitrogen fertilizer, apply ammonium nitrate 10 ~ 13 kg or ammonium bicarbonate 20 ~ 30 kg per 667 square meters, combined with watering, cultivating loose soil, so that frozen wheat as soon as possible to restore growth.

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