Usage of potassium dihydrogen phosphate on wheat

The application of potassium dihydrogen phosphate to wheat is a mature agronomic method. It can protect grain and increase weight and prevent dry hot air. However, if scientific application is not achieved, the yield increase effect is not obvious. Jiaozuo soil and fertilizer workstation in Henan province since 2001. For 3 consecutive years in Wuzhi County wheat application potassium phosphate test, the average increase of more than 20%, general investment per mu 15~20 yuan, can increase the value of food 100~150 yuan. The investment benefit ratio is about 1.5:10, so that many farmers have benefited.

Specific application method: soaking and seed mixing before sowing wheat seed mixing with potassium dihydrogen phosphate before sowing: 25 g of potassium dihydrogen phosphate is used for each kilogram of seed, evenly sprinkled into the wheat seed with a small amount of water, and then piled up for 3-5 hours to dry before sowing. Soak: Use 20 g potassium dihydrogen phosphate per kilogram of seed, weigh according to the amount of seed, stir well in water in a container and put the seeds. Make the solution level about 1cm higher than the seed. Allow to dry for 10 hours before sowing. With potassium dihydrogen phosphate immersion, seed mixing wheat seed, seedling neat, seedling whole, Miao zhuang, before winter points many evil, large group.

Foliar spraying starts from the green stage of wheat. It includes five key periods, namely, returning green stage, jointing stage, booting stage, flowering stage and grain filling stage. Spray the wheat at least twice according to seedling condition, growth and appearance. Generally in the spring wheat rise, mu head number of more than 600 thousand strong seedling field. Spray once at booting stage and grain filling stage, and spray once at returning green stage, jointing stage and grain filling stage for wheat fields with less than 600,000 heads. The dosage of the above spraying is controlled at 600-800 g per mu per time. Can play strong and anti fall, increase 1000-grain weight, prolong the function of leaf life, extend the filling period, prevent the effect of hot dry air, but also can reduce the harm of disease and insects, wheat yellow.

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