Wheat winter field tube: grab the early balance, weaken the frost damage

This year, during the autumn season in our province, the weather continued to be fine, which is very conducive to autumn harvest. According to the recent analysis of the autumn broadcast situation in the province, the wheat sowing period is relatively concentrated this year. The sowing period of the rice buckwheat in the whole province is about 10 days earlier than the previous years. The area of ​​late sowing is greatly reduced, and the quality of sowing has been improved, especially The area of ​​rotten cultivating seeds has been greatly reduced, and the quality of straw returning has been improved. At present, the seedlings in each region are relatively well-developed. The province has produced a total of 25.14 million mu of wheat, an increase of 6 million mu over the same period of the previous year. The average seedling per mu is 238,000, which basically achieves a full seedling, laying the foundation for next summer harvest. A good foundation. However, the survey also found that the problem of excessive seeding caused by excessive seeding was widespread in production. In addition, due to the large difference in sowing date, the difference in seedling base was also large, especially since mid-November, the temperature range was large, and the low temperature continued. Conducive to the growth and tillering of wheat seedlings before winter, the elimination of seedling stage is blocked, and the risk of freezing damage is increased, which is not conducive to the early sowing of wheat to achieve strong seedlings before winter.

In view of the characteristics of this autumn's autumn broadcast situation and the outstanding problems existing in the current seedling situation, we must do everything possible to rush to broadcast the tail, effectively strengthen the implementation of a management measure, and strive to promote the transformation and upgrading of the Miao situation, laying a good foundation for the summer harvest. The field management work of wheat before winter should focus on “grasping the balance and promoting the prevention of frost damage”.

Assault rushing to sort and tail, properly increase the amount of broadcast

At present, rice buckwheat, which has not yet been sown, should be rushed to grab and rob, and appropriately increase the amount of seed used to ensure the quality of planting. First, we must improve the quality of straw returning and land preparation so as to make up for the evening. The rice straw should be ground as much as possible, and the special straw pulverizer can be used for the smashing operation. When the lyric is suitable, the soil is planted after deep burying the grass. Due to the late broadcast period, the use of the broadcast method is not recommended. The second is to increase the amount of seeding appropriately to cover the night. Late-sown wheat mainly relies on the main stem to form the ear, which is “single stalk cultivation”. "Small snow" after the solar terms, too late to sow, should consider the factors of a significant decline in the emergence rate under low temperature conditions, the basic seedlings per mu in Huaibei area should be increased to about 350,000, the seeding amount per mu is controlled at 25 to 30 kg; The basic seedlings are controlled at around 250,000, and the seeding rate per mu is about 20 kg. The third is rational fertilizer and water management, scientific promotion and control. Appropriately control the amount of nitrogen in the base fertilizer and re-apply the jointing fertilizer.

Early application of seedling fertilizer, grasping balance, promoting weak seedlings

"The base fertilizer is insufficient to make up the fertilizer." For wheat fields with insufficient amount of white soil or insufficient base fertilizer, it is necessary to supplement the seedling fertilizer or tiller fertilizer as soon as possible to ensure that the base seedling fertilizer applies more than 9 kg of pure nitrogen per mu, accounting for 50% to 60% of the total nitrogen in a lifetime. For Wangchang wheat, it should be rushed to warm and spray "short and strong", "dwarf seedling" or uniconazole and other chemical control agents, or moderately suppressed when the moisture is suitable; first and second seedlings 3 to 5 leaf stage According to the appropriate condition of the seedlings, the Zhuangzi balanced fertilizer can be applied, and about 5 kg of urea per acre can be used to promote the growth of large tillers; late-seeded wheat should not be blindly applied in the case of sufficient seedlings and basic seedlings to prevent excessive tillering. Occurrence, the focus should be after the greening, the jointing of the ear and the ear of the ear, to minimize the impact of late sowing on the yield; the basic seedlings and the number of stems are insufficient, can be fertilized according to the condition of the seedlings.

Moderately suppress, cover, irrigate, freeze-proof

The wheat field with large amount of straw returning and loose soil in the topsoil should be moderately suppressed, and the principle of “dry pressure and no pressure, no pressure, no pressure, no pressure, no seedlings, no seedlings” should be followed to ensure the close connection of roots and soils ability. For the scorpion live broadcast and short symbiotic intercropping wheat, it can be combined with the increase of the field ditch system to strengthen the coverage by ditching the soil, or increase the application of soil and fertilizer to strengthen the cover. For the fields where the grievances in the wheat fields are seriously insufficient, depending on the weather conditions and trends, irrigation should be carried out in advance before winter, and irrigation or furrow irrigation should be adopted to avoid flooding.

In addition to scientific, to prevent "frozen drugs"

For the field that was not closed at the time of planting, it was sprayed in the "cold tail warm head" and the sunny day with a daily average temperature of 5 °C or more. At present, due to the low temperature, it is necessary to use herbicides with caution to avoid "freezing phytotoxicity" caused by low-temperature drugs.

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