The latest wheat should start from autumn sowing and be based on disaster prevention and disaster prevention.

Wheat production has experienced autumn, winter, spring and summer, has a long growth period, and has a high probability of encountering natural disasters such as drought, continuous rain, wet damage, low temperature freezing injury, diseases and insect pests, etc., so we must start with autumn sowing and be based on disaster prevention and disaster resistance. to lay the foundation for the realization of high and stable yield.

Seed treatment

The improved wheat varieties with high yield, high quality and wide resistance were selected, and the purity ≥ 98%, purity ≥ 98%, germination rate ≥ 85%, water content ≤ 13% were required to dry the seeds 2-3 days before sowing. Before sowing, Likexiu 6% tebuconazole suspension seed coating agent 10 ml plus water 300 ml mixed with 25 kg seeds to prevent wheat scattered smut, sheath blight and other systemic infectious diseases and soil-borne diseases. For selected commercial wheat species, under the condition of suitable soil moisture and conducive to seedling emergence, we can use 20 grams of dwarf seedlings per mu plus 0.5 kilograms of water and 0.75 kilograms of water to dilute the seeds and mix them with 6 kilograms of 10 kilograms to promote rooting, tillering and strong seedlings. For the wheat fields without seed dressing and growing before winter and early spring, measures such as suppression or chemical control can be taken to appropriately inhibit the growth.

Apply sufficient base fertilizer

According to the principle of soil testing formula, sufficient base fertilizer is applied, phosphate fertilizer is mainly applied, and nitrogen and potassium fertilizer is combined. Base fertilizer generally applies urea 5kg / mu, 45% ternary compound fertilizer (nitrogen, phosphorus, potassium content is 15%) 25kg / mu, and organic fertilizer is recommended to apply more than 1000 kg / mu where conditions permit. The total amount of rice straw returned to the field should be increased by about 10% of the amount of nitrogen fertilizer in the base fertilizer.

Supporting the "three ditches"

Vigorously promote mechanical trenching, especially in Huainan area, we should dig a vertical trench every 3 to 4 meters, with a width of 20 centimeters and a depth of 20 centimeters, and a horizontal trench 2 to 5 meters away from the horizontal ridges at both ends of the field, and a waist trench every 50 meters for longer fields, with a width of 20 centimeters and a depth of 30 centimeters. The outlet ditch of the field head is required to be 25 centimeters wide and 40 centimeters deep to ensure that the internal and external "three trenches" are connected. The grass returning field should reduce the width of the vertical ditch, increase the density and depth of the ditch, increase the amount of soil taken from the ditch system to cover the border, prevent the emergence of seeds, and improve the effect of irrigation and drainage to reduce the harm of waterlogging.

Repressive coverage

The field blocks of dry stubble wheat and straw returned to the field in Huaibei should be suppressed after sowing, and the field surface can be suppressed with stone stalks greater than 30 cm in diameter or special suppression machinery, so as to make the plough layer tight, increase the seedling emergence rate, promote the whole seedling, complete seedling and preserve soil moisture and prevent freezing, and ensure safe overwintering. Rice stubble wheat, especially direct seeding with plate stubble and interplanting wheat in paddy field, can increase the application of soil miscellaneous fertilizer or ditch mud and straw mulching.

Scientific division

When the soil moisture before seedling is suitable after sowing, spray with 50% isoproturon wettable powder 125g / mu plus 40kg / mu of water to block weeds. Before overwintering, the fields where there is no soil sealing treatment or the effect of sealing treatment is not ideal, and the amount of weeds reaches the control index before overwintering, should be removed according to the grass phase spraying in time. The fields dominated by Monocotyledon weeds were sprayed with 6.9% Fenazaocaoling EC 60ml / mu plus 40kg / mu of water during the 2th and 4th leaf stage of weeds, and the fields dominated by dicotyledonous weeds were sprayed with 200g / L chlorofluoropyloxyacetic acid EC 30ml / mu and 40kg / mu after the weeds were basically grown at the stage of 4 ~ 5leaf of wheat. In the wheat field with mixed Monocotyledon and dicotyledonous weeds, the related chemicals can be mixed. When the daily average temperature rises to about 8 ℃ after the beginning of spring, the suitable chemical can be selected according to the grass phase before wheat jointing. Pay attention to the cold tail warm weather application, to avoid the cold wave before the use of medicine, in order to prevent drug damage.