Sources of wheat freeze injury and freezing measures: Henan Rural News Category: Technical Articles Update Time: 2008-11-4 17:29:35 Read 45 times freezing winter wheat production is one of the majority of disaster in the northern wheat growing areas, especially at low temperatures , drought year, freezing damage is heavier. According to local experiences, in addition to the selection of cold-resistant varieties, there are the following technical measures to prevent freezing of winter wheat during winter.
Appropriate top dressing. For wheat fields that are underfertilized before sowing, topdressing before winter can consolidate the effective delivery of wheat, increase the sugar content of tillers, and increase the ability of the plants to resist cold. Nitrogen, phosphorus, and potassium should be mixed after dressing, and the proportion should be appropriate. Phosphate fertilizers, in particular, have significant benefits in promoting the lowering of wheat roots, regulating the nutrients and water needed in plants, and increasing the cold resistance of wheat. Therefore, special attention should be paid to the application of phosphate fertilizers. Partial application of nitrogen fertilizers should be avoided to avoid causing leggy plants. The stem and leaf tissue is too young and reduces the cold resistance.
Wheat field covered. Covering wheat seedlings with soil and straw dung can thicken the soil layer in the field of tiller, and stabilize the temperature, reduce the temperature difference, and protect the cold. At the same time, covering manure can also take advantage of the deep color of organic fertilizers to increase the absorption of solar radiation in wheat fields and provide effective nutrients for wheat return to green. Covered soil is generally selected when the wheat is stopped growing. The thickness of the tiller section is about 3 cm below the soil layer. It is appropriate to clear the ridge in the springtime in the spring, so as to prompt the wheat seedlings to return to green growth. Cover manure should be carried out within 10 days after the growth of wheat seedlings is stopped. It is best to use hot fertilizer such as decomposed sheep and horse dung. It has been determined that the coverage of wheat fields is about 2°C higher than the temperature of non-covered wheat fields.
Plowing suppression. The cultivating and suppression of the cultivator can prevent drought and prevent freezing damage. Therefore, it is more important to combine cultivators and winter irrigators in time, especially in clay land. The effect of warming and warming can be obtained for the late summer wheat fields, the lower wet wheat fields, and the middle and early tillage. 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 where the quality of the ground is poor, the wheat roots are topped off by the roots of the former crops and the stubble dust, and the wheat roots can be brought into contact with the soil by repressing and crushing the rubbish to make up the cracks and increase the compaction of the soil. ability. However, salt, sand and wetlands should not be repressed so as to avoid salinity, wind erosion, and hardening.
Pouring urine in winter. From the beginning of winter to the vernal equinox, the accumulated human fecal urine is poured directly into the wheat ridge, which not only has a significant effect on preventing the freezing injury of wheat, but also has a nitrogenous effect. It is usually advisable to apply 500-800 kg per acre. 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.
Appropriate top dressing. For wheat fields that are underfertilized before sowing, topdressing before winter can consolidate the effective delivery of wheat, increase the sugar content of tillers, and increase the ability of the plants to resist cold. Nitrogen, phosphorus, and potassium should be mixed after dressing, and the proportion should be appropriate. Phosphate fertilizers, in particular, have significant benefits in promoting the lowering of wheat roots, regulating the nutrients and water needed in plants, and increasing the cold resistance of wheat. Therefore, special attention should be paid to the application of phosphate fertilizers. Partial application of nitrogen fertilizers should be avoided to avoid causing leggy plants. The stem and leaf tissue is too young and reduces the cold resistance.
Wheat field covered. Covering wheat seedlings with soil and straw dung can thicken the soil layer in the field of tiller, and stabilize the temperature, reduce the temperature difference, and protect the cold. At the same time, covering manure can also take advantage of the deep color of organic fertilizers to increase the absorption of solar radiation in wheat fields and provide effective nutrients for wheat return to green. Covered soil is generally selected when the wheat is stopped growing. The thickness of the tiller section is about 3 cm below the soil layer. It is appropriate to clear the ridge in the springtime in the spring, so as to prompt the wheat seedlings to return to green growth. Cover manure should be carried out within 10 days after the growth of wheat seedlings is stopped. It is best to use hot fertilizer such as decomposed sheep and horse dung. It has been determined that the coverage of wheat fields is about 2°C higher than the temperature of non-covered wheat fields.
Plowing suppression. The cultivating and suppression of the cultivator can prevent drought and prevent freezing damage. Therefore, it is more important to combine cultivators and winter irrigators in time, especially in clay land. The effect of warming and warming can be obtained for the late summer wheat fields, the lower wet wheat fields, and the middle and early tillage. 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 where the quality of the ground is poor, the wheat roots are topped off by the roots of the former crops and the stubble dust, and the wheat roots can be brought into contact with the soil by repressing and crushing the rubbish to make up the cracks and increase the compaction of the soil. ability. However, salt, sand and wetlands should not be repressed so as to avoid salinity, wind erosion, and hardening.
Pouring urine in winter. From the beginning of winter to the vernal equinox, the accumulated human fecal urine is poured directly into the wheat ridge, which not only has a significant effect on preventing the freezing injury of wheat, but also has a nitrogenous effect. It is usually advisable to apply 500-800 kg per acre. 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.
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