Field management of spring wheat

1, timely irrigation. The second leaf of spring wheat is irrigated with water for the first time, with an interval of 10 day and an irrigation amount of 50-60 cubic meters/mu. Irrigation should be even, and there should be no water. After the second watering of spring wheat, the third watering should be slow. Generally, the third watering should be carried out at booting stage after jointing, when 1-2 nodes are formed and ineffective tillers die. It can effectively control ineffective tillers, promote the growth of main stems and effective tillers, and facilitate the concentration of nutrients and water in the direction of panicle differentiation, thus promoting large panicles and more grains. The interval between the third watering and the second watering is generally 15-20 days, and the water at jointing and booting stages should be watered thoroughly. The water quantity is 70-80m3/mu.

2. Reasonable topdressing. Top dressing of spring wheat depends on soil conditions and the growth of wheat seedlings. Generally, it has moderate fertility. When sowing, 5-8kg of urea should be applied to the plots without seed fertilizer combined with irrigation water, and no fertilizer should be applied to the plots with seed fertilizer. Urea 10- 12 kg per mu should be applied to wheat fields that grow normally at jointing and booting stages, and irrigation should be coordinated. Wang Changtian should use less urea appropriately, and use 5- 10 kg of urea per mu. Apply more urea to weak seedlings, and apply urea 10- 15 kg per mu. It can not only provide enough nutrition for the robust growth of spring wheat, but also prevent excessive growth.

3. Chemical weeding. Chemical weeding of wheat should be carried out as soon as possible after the emergence of wheat and sprayed before the emergence of cotton to ensure the safety of drug use. Herbicides with small drift should be selected, such as 2 methyl 4 chlorine and broadleaf. The sprayer should be dedicated. Once the cotton in the adjacent plot emerges, the herbicide in the wheat field shall not be used again, so as not to cause phytotoxicity to cotton.

4. Chemical control. For wheat fields with good water and fertilizer conditions and excessive growth, chemical control should be carried out with chlormequat chloride 100- 120g/ mu before and after the jointing stage of wheat to prevent wheat seedlings from overgrowth and lodging in the later stage.