The latest course of Poplar planting techniques and methods

White poplar, also known as poplar, silver poplar, etc., is a deciduous tree of the poplar family poplar, with strong survivability. It exists on the roadside and beside the ridges of the fields where there is loess, and the trunk is slender and erect, up to 20 meters high. it can be used as firewood, furniture, purlin beams and farm tools, which is of great cultivation value. Let's take a look at poplar planting techniques.

Cultivation value of Poplar

Poplar has a strong adaptability, the tree shape is tall, the silver leaves shake in the breeze and shine in the sun have a special flickering effect, the appearance is straight and clean, it has a certain ornamental value, and can be used as shade trees and street trees in the lawn. It can also be used as sand fixation, soil protection, rock protection, embankment and barren sand afforestation. In addition, there is medicinal value, extract from poplar (including salicylic acid), can relieve pain and fever, poplar bark has the effect of expelling wind, removing blood stasis, eliminating phlegm, treating wind arthralgia, beriberi, blood stasis, dysentery of pregnancy, toothache, mouth sores and other diseases.

Growth habits of Poplar

Poplar trees like light, do not tolerate shade, withstand severe cold, and have no frost damage at minus 40 degrees. Resistant to dry climate, but not resistant to hot and humid, southern cultivation is prone to diseases and insect pests, and the trunk is often curved in the shape of a shrub. Light alkaline soil tolerant to poverty, tolerant to soils with salt content less than 0.4%, but growing poorly in clayey soils. Deep root, developed root system, strong soil consolidation ability and strong root tiller. The ability to resist wind and insect pests is strong, and the life span is more than 90 years.

Site selection of Poplar

The selection of forest land suitable for poplar growth is the basic condition to realize rapid growth and high yield of poplar. Poplar is a fast-growing species of deciduous broad-leaved trees, which grows best on alluvial soil with deep, loose, fertile, moist and well-drained soil, with flat terrain or slope below 15 °and effective soil layer thickness of more than 0.7 meters. Land with irrigation conditions. The soil texture of light loam and sandy loam is the best, followed by middle soil, and Populus tomentosa can grow on heavier soil. The groundwater level suitable for growth should be about 1.5 meters, and the groundwater level should be less than 1 meter during the growing period. The content of soil nutrients is high, and the minimum content of organic matter is more than 0.4%. The soil ph value is 6: 8, the soil salt content is less than 0.1%, and the gravel content is less than 20%.

Land preparation and afforestation of poplar

Soil preparation is carried out before the soil is frozen, land leveling is carried out according to the topography, comprehensive land preparation with machine ploughing and complete reclamation is carried out, with a depth of more than 30 cm, or local soil preparation of banded and anti-slope terraces, and then 80 cm square planting holes are excavated. when digging holes, the topsoil is stacked separately from the subsoil. The woodland with good site conditions, the varieties with fast growth and larger crown, and those with large diameter wood have lower density. The site condition is poor, the varieties with straight stem shape and narrow crown shape are selected, and the density can be higher when cultivating stands with short rotation. The suitable row spacing is 2 × 4 m, 3 × 4 m, 4 × 5 m and 4 × 8 m in pure forest, and 1 × 2 × 12 m and 1.5 × 2 × 8 × 10 m in the plain where agroforestry is carried out.