The best time for poplar planting is before spring germination. After Tomb-Sweeping Day, the leaves have grown very big, and will die if planted again, because poplars are usually planted with bare-rooted seedlings, which will make the water balance of trees fail to keep up, resulting in water shortage. Therefore, it is necessary to master the planting season. After defoliation, it is best to replant after autumn, not too early, but don't plant below zero, so the root system will not recover well.
It can also be carried out after the first frost in autumn, when the leaves will turn yellow and fall off, and the aboveground parts will usually stop growing. At this time, if planted, the roots can still have a recovery period.
Extended data:
Poplar tending management:
1, Agroforestry Intercropping
Agroforestry intercropping can not only improve the utilization rate of land, but also play a role in raising young forests, promoting tree growth and increasing income through the management of loosening soil, weeding, watering and fertilizing crops. Intercropping crops should be soybean, peanut and other leguminous crops, which are short, shade-tolerant, consume less water and fertilizer, or melons, vegetables, medicinal materials and wheat.
2. Rational fertilization
If the organic matter content in the soil of poplar plantation is low, a large amount of organic fertilizer and 100~200 kg manure should be applied to each hole to build a high-yield Yang Shulin on this soil. Stir the raw soil at the bottom of the planting hole evenly, and then cover the topsoil of 10~ 15 cm for afforestation, so that the seedlings will not contact the fertilizer. When retting organic fertilizer, adding calcium superphosphate is better.
3. Weeding and loosening the soil
Weeds are overgrown in the young forest of weeding and loosening the soil, which not only competes with the young trees for nutrients, water and sunshine, but also affects their growth. Weeds can provide breeding and habitat for bacteria and pests, and at the same time, they can harden the soil surface.
The function of weeding and loosening soil is to eliminate weeds, loosen soil, reduce surface evaporation, maintain soil moisture and improve soil ventilation, thus promoting root development and young tree growth, and playing a role in preventing and controlling pests and diseases. Weed and loosen the soil three times a year in the first three years of newly-built young forest, and the methods may vary according to the types of forest land, but the principle of "early weeding, small weeding, middle sealing, loosening the soil around without damaging the roots" should be strictly controlled.
Step 4 trim and reshape
Pruning is to cut off unnecessary branches according to the needs of different poplar growth and development. Integer is to maintain a certain shape or tree potential by pruning, so as to achieve the purpose of fast growth, high yield and high quality.
Poplar pruning should remove the multi-head and competing branches, big branches and basal sprouting branches that compete with the main shoot and trunk for nutrition, cut and burn the branches of pests and diseases and basal sprouting branches in time, so that the interior of the crown is ventilated and transparent, which is conducive to growth.