The North Korean yellow poplar was sown at the right time.

Recently, due to the increasing use of Populus tomentosa in the north, manufacturers have begun to use sowing instead of cutting to propagate the variety, but the technical details are generally unfamiliar. Experts warn that the life span of Populus tomentosa seeds is short after maturity, so it is most appropriate to sow seeds from now on to September 20.

Populus tomentosa belongs to the evergreen shrub of Populus tomentosa. It can be transplanted throughout the growing season, can withstand the low temperature of-35 ℃, has strong sprouting power and is resistant to pruning, and is suitable for hedges or pruning into various patterns.

According to Zhou Gongchen, manager of Fengyuan nursery in Donggang City, Liaoning Province, Populus tomentosa can be cut, sown and propagated. With the increasing demand of Populus tomentosa, sowing propagation, which has the advantages of simple process, large yield and high survival rate, began to replace cutting propagation. He suggested that sowing could be done by both strip sowing and sowing. Among them, when sowing, the seedbed should be arranged before sowing, apply the right amount of rotten farm manure (1 cubic meter per mu), and then turn deeply into a low bed 1.2 meters wide to be sown. When sowing, each bed opens four ditches with a depth of 5 cm and a width of 15 cm to 18 cm. After watering the bottom water, apply an appropriate amount of pesticides to control underground pests. Sow seeds evenly, cover the soil evenly and cover the grass curtain.

When sowing, the seedbed is made into a trough-shaped low bed with a width of 1.2 meters and a depth of 6 centimeters, sifted and covered with soil and sand. Sprinkle an appropriate amount of pesticides and fertilizers to control underground pests before sowing and mix them fully with the soil. Then sow the seeds evenly, 30 to 35 grams per square meter. Cover with sifted fine soil 4 cm and sand 2 cm. Just water it at last.