Urea and compound fertilizer are better for poplar 107. Topdressing can be done twice in June and July, with urea 15-20kg and compound fertilizer 25-30kg per mu and fertilization depth of 5- 10cm. After fertilization, bury the soil and water it, or dilute the fertilizer, spray it on the seedbed, and then rinse the seedlings with clear water. Remove the lower branches of poplar, leaving only the upper and middle branches, so that the nutritional burden of poplar will be less heavy and the plants will grow faster.

1. What chemical fertilizer should be used on poplar 107?

Fertilizers such as urea and compound fertilizer are better for poplar seedlings of 1 and 107. In June and July, topdressing can be done twice, with urea 15-20kg and compound fertilizer of 25-30kg per mu and fertilization depth of 5- 10cm.

After fertilization, you must bury the soil and water it. You can also dilute the fertilizer, spray it on the seedbed, and then rinse the seedlings with clear water. Topdressing can be carried out when the seedlings grow lateral roots, and fertilization is not allowed after beginning of autumn, so as to avoid the seedlings growing in vain.

3. You can also subtract the lower branches of poplar, leaving only the upper and middle branches. In this way, the nutritional burden of poplar is lighter and the plants will grow faster. At the same time, some gibberellin solution can be coated on the upper branches of poplar, which also has good growth effect.

Second, the planting row spacing and plant spacing of poplar seedlings

1. Generally, the row spacing of poplars is 4-6m and the spacing between plants is 2m. Poplar is the most widely distributed and adaptable tree species in the world. Its trunk is straight, its bark is smooth or longitudinally cracked, and it is grayish white, which is suitable for planting in fertile soil.

2. Poplar is suitable for planting where the effective soil thickness exceeds 1m, the open water level exceeds 1.5m and the annual rainfall is sufficient.

3. Note that if the effective soil thickness is below 0.4m and the open water level is below 0.5m, this situation is not suitable for poplar planting.