How to plant and manage poplars

1. Seedling treatment: In the seedling field, the principle of watering first and then raising seedlings should be followed, and attention should be paid to protecting the root system in the process of seedling transportation, so that the root system is complete, fresh and moist, and it should grow, transport and plant with it as much as possible. For the seedlings that can't be planted in time, some clones of Populus deltoides should be soaked in clear water 1 ~ 2 days before planting.

2. Seedling planting: The planting depth depends on the soil conditions, and it is appropriate to plant about 60 cm in dry and loose soil. This depth can increase the rooting of seedlings and improve the ability of drought resistance and wind resistance, but it is not suitable for deep planting in places with relatively thick soil and low terrain.

3. Timely irrigation: In addition to immediately watering the newly built young forest, timely irrigation should be carried out in the dry season from April to June to ensure the vigorous growth of trees. Irrigation should also be carried out in autumn drought, and winter irrigation of Populus deltoides and other varieties can improve the drought and cold resistance of trees. Irrigation times and irrigation amount depend on weather and soil conditions.

4. Rational fertilization: Before afforestation, apply soil miscellaneous fertilizer 1.500 kg and calcium superphosphate about 50 kg per mu, and then mix them and apply them into the depth range of root system planting in the dug tree hole. From May to June every year, topdressing is carried out twice in the vigorous growth period of poplar, and the amount of fertilizer applied each time is 3-7kg of urea or 0/2-/0/5kg of ammonium bicarbonate. Afforestation can be applied late in the same year, less, and more with the growth of forest age, and pay attention to the coordination of nitrogen, phosphorus and potassium, and combine topdressing with watering.

5. Loosening the soil and weeding: Weeding should be done at least twice a year before the stand is fenced, and crop management can be combined when the intercropping of agriculture and forestry is implemented. After the stand is closed, the times of weeding can be reduced appropriately. When intercropping agriculture and forestry, it is not specially used to loosen the soil for forest land. After the intercropping stops, loosen the soil 1 ~ 2 times a year at least to loosen the soil and prevent the soil from hardening.

6. Reasonable pruning: Timely pruning can improve the trunk quality, which is conducive to cultivating high-quality wood with perfect dry shape. When planting trees, trim all the side branches of the seedlings. For young trees 65,438+0 ~ 3 years after afforestation, competitive branches are removed, auxiliary branches are retained, sprouting strips are cut off at the base of trunk, and upright and robust trunk is cultivated. Pruning strength should keep the ratio of crown width to tree height above 3/4.