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The late sowed wheat has insufficient accumulated temperature before winter and it is difficult to bring winter hoeing and wintering. The rate of tilling and tilling is low. It is better to increase the seeding rate and increase the basic seedlings. Huaibei area before and after November 15 planting, basic seedlings per acre to 300,000 to 350,000 is appropriate, sowing rate of about 20 kilograms per acre.
In addition, late sowing wheat should be fine soil preparation, adequate planting, adequate shallow sowing, to ensure that the whole seedlings, Qi Miao, uniform seedlings, strong seedlings, lay the foundation for the ear. In the early stage, the trench system should be strengthened to increase the level of flood control and drought resistance. In the middle stage, it should be controlled by high-controlling and anti-falling agents to prevent lodging. In the later period, the prevention of pests and diseases should be strengthened. The application of foliar fertilizer and plant growth regulators should be paid attention to, and the roots should be protected to prevent the high temperature. Fatigue, increase grain weight gain. Because there are more basic seedlings, the amount of fertilizer applied in the early stage should be appropriately reduced to prevent overpopulation, and after the number of groups is reduced after jointing, it is necessary to appropriately increase the nitrogen fertilizer application to attack large spikes, and it can be divided into two applications of flower and fertilizers. In the Huaibei region, the target yield of 450 kg per mu need to apply 15 to 16 kg of pure nitrogen, and the ratio of nitrogen, phosphorus, and potassium is generally 1:0.6:0.6; the base fertilizer in nitrogen fertilizer accounts for 30%, and the balance between 3 and 4 leaves is applied to balance fertilizer. 10% to 15%, the application of fertilizer at the fall of the 3rd leaf stage accounts for 25% to 30%, and the sword blade leaves 30%. The basic recovery ratio of phosphorus and potassium fertilizers is generally 5:5. It is advisable to apply high-concentration compound fertilizers to supplement phosphorus and potassium in the inverted 3-leaf stage.
In Huaibei area of ​​our province, semi-winter wheat varieties are mainly planted. The suitable sowing date is in the mid-to-late October. In the Huaibei area of ​​our province, wheat was sown until late November 15th and planted too late. Although it is possible to plant half-winter wheat varieties such as Huai Mai 26, it is better to use large spike-type weak spring varieties. The ripening period of these varieties is relatively early, and the grouting intensity is large. It is easy to form large spikes, with higher grain weight and more stable production. Huaibei region is sown before and after November 15th. Huaimai 21 and Huaimai 30 can be used as the spring-type large ear varieties. These varieties are also good in cold resistance and lodging resistance.