Wheat catch four defenses in spring

In order to ensure high and stable yield of wheat, wheat management should grasp 4 prevention in time after spring. After spring, there is much rain. If the drainage is not smooth and the soil humidity is too large, it is easy to cause damage. Ditch drainage should be cleaned in time, plant ash scattered between rows, loose soil, increase soil permeability. Lodging prevention has great influence on wheat yield, so it should be done well as early as possible. For the plots with lodging tendency at wheat seedling stage, deep intertillage and suppression were carried out before wheat jointing, and chlormequat solution with concentration of 0.2%~0.4% was sprayed at the early stage of wheat jointing after dew drying in sunny days. After heading, roots, stems and leaves stop growing, the growth center turns to ear, and organic nutrients produced and stored by stems and leaves are continuously transported to grains. This period, often due to lack of fertilizer leaves premature aging, resulting in a decline in 1000-grain weight and yield, so should be timely fertilizer. Foliar fertilizer is usually applied. Nitrogen, phosphorus and potassium fertilizers are sprayed on the leaves from booting to early filling stage of wheat to supplement the deficiency of soil nutrients and prolong the functional period of leaves. The method is to add 1% urea to 0.2%~0.3% potassium dihydrogen phosphate solution and spray it once every 10 days for 2~3 times continuously. The effect is better when spraying once when the leaves are full. Spraying fertilizer time is best in the evening, should not be sprayed around noon under the scorching sun, if sprayed within 8 hours of rain, to make up spray. The middle and late stages of disease and pest control of wheat are the high incidence period of diseases and pests such as scab, rust, sharp eyespot and aphid, which have great influence on yield and quality, so it should be controlled as early as possible.