Prevention of wheat lodging in spring

Lodging is one of the main obstacles affecting wheat yield under the condition of high fertilizer and water. In recent years, the popularization and application of plant growth regulators in wheat production has opened up a new way to prevent lodging and promote yield increase, and it is an important technical measure for high and stable yield of wheat. 1. Spraying 200ppm paclobutrazol solution 30 kg / mu during wheat emergence period could dwarf plants, enhance lodging resistance, cure wheat powdery mildew and improve nitrogen absorption and utilization. 2. The application of uniconazole (code Smur3307, commercial 5% wettable powder) is a new type of efficient plant growth regulator, and its biological activity is 6 times higher than that of paclobutrazol. Application on wheat can prevent plant lodging under high density, high fertilizer and water conditions, reduce sterile spikelets and increase 1000-grain weight; according to the experiment, wheat treated with uniconazole increased an average yield of 15.4% compared with the control without wind and lodging. Application method: 50 kg of 30~40ppm uniconazole solution was sprayed per mu within a week before jointing of wheat. 3. Spraying chlorpromazine on large and prosperous wheat fields, spraying 0.15-0.3% Daizhuangsu solution 50-75kg per mu at the early jointing stage can effectively inhibit Internode elongation, dwarf the plant, make the stem base thick and hard, so as to prevent lodging; if mixed with 2mae4 color D-butyl, it can also treat broad-leaf weeds in wheat field. 4. Spraying zhuangsu at the jointing stage of wheat, 15 ml per mu and foliar spraying 50 kg of water can inhibit Internode elongation, prevent lodging in the later stage, and increase yield by 10%.