In spring, if we can control wheat growth and prevent lodging, we can enhance the photosynthetic efficiency of wheat and improve its seed setting rate and 1000-grain weight. Spraying plant growth regulation can solve this problem, and it is a very effective measure to increase production.

Spraying paclobutrazol and paclobutrazol is a kind of plant growth retarding agent, which can inhibit wheat legging, dwarf plant shape, increase tillering and prevent lodging, thus improving wheat yield. The application method is: before the wheat gets up and jointing, use 15% paclobutrazol wettable powder spray with a concentration of 150ppm per mu.

Spraying chlormequat can synthesize the length of 1-2 nodes at the base of wheat, prevent lodging, increase chlorophyll content, increase tillering, promote spike differentiation, and increase 1000-grain weight. The application method is: before the jointing of wheat, evenly spray 25~40ml of 50% chlormequat aqueous solution per mu, 30~40kg of water, and evenly spray it.

Spraying the hormone before jointing of wheat can shorten and thicken the 1~3 nodes at the base of wheat stem, control the exuberance and prevent lodging. In the flowering stage of wheat, it can improve the seed setting rate and filling speed, promote the big spike and full grain, and also advance the mature stage by 2-3 days. The application method is: before the jointing of wheat, 15~20ml of Zhuzhuang Su is applied per mu, and 40kg of water is spray; In the flowering stage of wheat, use 8-12ml of Zhuzhuang Su and 150g of potassium dihydrogen phosphate to spray 40-50kg of water per mu.