For Pinus tabulaeformis, Pinus armandii, Pinus bungeana, Phellodendron chinensis, Populus tomentosa, Astragalus membranaceus, Chinese banyan tree, Chinese wolfberry, Robinia pseudoacacia, Ginkgo biloba, Citrus reticulata, Forsythia suspensa, Rhynchophora angustifolia, Clove, Euonymus japonicus, Cyclovirobuxium brevifolia, Viola tricolor, Golden leaf For instance, privets and other varieties have been successfully planted in the fall.
Dust storms have frequently occurred in spring in recent years. Spring drought conditions in North China and Northwest China have been severe, and temperatures have risen rapidly. Soon after the plants were planted, the above-ground parts had sprouted, but the roots could not be completely restored and the survival rate of trees was reduced. In autumn, the temperature gradually decreases, the evapotranspiration is low, and the moisture content in the soil is relatively stable. The plants have accumulated more nutrients through a growing season. There is no natural dormancy period in the roots of trees. Under the condition of high soil temperature, the roots of hardy tree species planted in autumn can restore growth. As long as the permafrost layer is not thick in winter, the underlying root system still has certain growth, and the activity in late spring is also early. Therefore, autumn planting not only solves the problems of short planting time, spring drought and labor shortage in spring planting, but also ensures survival. It is an effective way of planting trees.
Planting time:
From deciduous to soil can be frozen before. Autumn planting should also be done as soon as possible. It has been proved that the survival rate of deciduous trees such as Populus tomentosa, Scorpion, and Scutellaria baicalensis can reach 100% in mid-November; Evergreen coniferous trees such as Pinus tabulaeformis, Pinus armandii and Cypress can be planted from mid-October to Mid-November. The rate can reach 100%; low-yielding shrubs such as Euonymus japonicus, Cyclovirobuxium brevifolia, Ligustrum quinquefolium, and Viola tricolori can also be planted in late October and before freezing, and the survival rate can reach 98%. Tree specification: The specifications for autumn tree planting are the same as in spring. Generally, the evergreen tree height is 1.5 to 3.5 meters, the deciduous tree diameter is 4 to 20 centimeters, and the shrubs are 0.3 to 2.5 meters.
Planting technology:
According to the diameter of the tree diameter or the size of the soil, conventionally digging the trees and planting trees. The depth of planting is 3 cm to 5 cm deeper than spring, and the soil should be compacted. Immediately after the trees were planted, the water was poured for the first time. After 3 days, the water was poured for the second time. After 10 days, the water was poured for the third time. After pouring the water three times, you can seal the hole for the winter. Plant materials that need to be cold-proofed can be carried out in mid-November. The second year of spring watered twice after the usual management.
Precautions:
1. Water must be poured thoroughly.
2. All seedlings, especially small dwarf shrubs such as boxwood, must be planted in depth, and the tree holes should be compacted after sealing the hole to prevent cracks and water loss after the northwest wind blows in winter.
3. Dwarf shrubs should be trimmed in place as soon as possible after planting in order to prevent cold. Do not be short-cut for cold protection. Keep branches long enough to avoid winter or spring cold stripping.
4. Cold-tolerant species should be planted in the fall, while trees that are not very hardy at the edge and fleshy roots, such as magnolias and liriodendrons, should be planted in the spring.
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