Seedlings planted in autumn and planted in spring to strengthen management
In the autumn, the temperature gradually decreased, the soil temperature was relatively high, the water content was stable, and the seedlings also accumulated more nutrients. At this time, transplanting seedlings was beneficial to root healing and growth, and the survival rate of seedlings was higher. Therefore, the autumn is a good time to build new orchards and afforestation. After entering the cold season, the northern region should pay attention to adopting reasonable anti-freezing and cold-resisting measures so that the seedlings can safely pass winter.
Autumn planting seedlings benefits
The autumn tree planting can avoid the period of afforestation and ensure the quality of nursery stocks is heavy and the time is tight. In order to grab the time and compete for the speed, the seedling units have snapped up seedlings, which results in tight supply of seedlings and it is difficult to ensure seedling quality. There is ample supply of green seedlings in autumn, and there is plenty of room for selection. There will be no shortage of seedlings during busy seasons. At the same time, the growth of seedlings can be fully observed in the growing season of seedlings, and quality seedlings can be selected.
Planting trees in autumn can avoid the high seasons of pests and diseases, which is conducive to the healthy growth of seedling trees. The green seedlings in spring are the growth stages of young leaves in summer, and there are more pests in summer. If the control is not timely, it can easily lead to the survival of seedlings. However, when the trees are planted in the fall, the climate is cool, most of the pests begin to converge, and the incidence of various diseases is low. This is an excellent opportunity for the seedlings to survive and grow. By the early summer, the disease has reached a high season, and the seedlings have a certain ability to resist.
Planting trees in autumn can improve the survival rate of seedlings
From the perspective of natural conditions, northern China's spring drought is less rainy each year, rainfall is mostly concentrated in July-September, autumn soil moisture infiltration and accumulation, and the atmospheric evaporation accounted for only 16% (33% in spring), which is the autumn afforestation Creates a good moisture condition. Trees planted in autumn, Mr. Hunchun sprouted after roots and sprouted, and the germination time was 7 to 15 days earlier than that planted in spring, effectively extending the period of tree growth. Long-term production practices have proved that the survival rate of afforestation seedlings in autumn and winter is 10%~15% higher than that in spring.
There are points in the autumn planting seedlings
The time for planting trees in the fall should be during the period from the time the seedlings begin to fall to the soil before freezing. Under normal circumstances, afforestation time is best arranged in the afternoon, in order to reduce the exposure time of seedlings, also has a certain role in improving the survival rate. Do not plant rain or rain during periods when there is no rain or low rainfall.
The best choice is to choose a plot with high soil moisture. In places with poor conditions, we must pay attention to soil, soil and soil, and create a suitable environment for growing seedlings.
Land preparation and soil preparation is an important task before afforestation. It is generally practiced in the rainy season for site preparation and afforestation in the following year, as well as for afforestation in the spring preparations for soil preparation, or land preparation in the autumn.
The depth of planting should be suitable for planting depth, generally 5 to 10 cm higher than the original buried land. It should be properly planted under sandy land and under conditions of drought to ensure that seedlings can absorb water after planting and avoid being blown down by the wind.
Planting Method When planting, plant the seedlings in the center of the pits and straighten the roots of the seedlings. Then fill in two-thirds of the soil. Raise the seedlings upwards, press the bricks, and fill the ground until it is level with the ground. Finally, a layer of loose soil is applied on the surface of the planting hole to prevent evaporation of soil moisture.
Post-planting management must be strengthened
Reasonably irrigating newly planted seedlings should be thoroughly irrigated, and the soil should be compacted. It is necessary to ensure that the seedling roots are in close contact with the soil, to prevent the loss of water from the seedling roots, and to reduce the threat of drought and cold to the seedlings. Decide whether to fill water according to soil moisture.
The increase of basal fertilizer in autumn is the peak of root growth. Newly planted seedlings are easy to heal roots and can issue new roots. Schiff base can enhance the wintering ability of seedlings and lay a good foundation for the growth and development of the following year.
Pruning and trimming should be carried out according to the tree shape and growth and development needs. To cut off pests and branches, inner litchi, competitive branches, dense branches and sprouting branches, the cut must be smooth and smooth.
Prevention and control of pests and diseases in the autumn can reduce the number of insect pests in the following year, and ensure normal growth of seedlings and full winter buds.
Cold winter cold winter cold winter areas, seedlings to do the winter protection work, such as the trunk warm, set up wind barriers, etc., to prevent excessive water loss of seedlings, for the newly planted seedlings to provide a safe wintering environment.
Sealed frozen water 11 to 12 months, the seedlings have stopped growing, in order to make the seedlings safe winter, not due to winter and spring drought damage, this time should be sealed frozen water. At about the beginning of November, according to the size of the tree, the tree-cultivation hole (10 times the diameter of the tree trunk) was used. Slow irrigation was performed with a small amount of water to infiltrate the soil to a depth of 50 to 100 cm. The newly planted seedlings are sealed once after they have been sealed with frozen water, which not only meets the water requirement of the tree itself, but also improves its cold resistance.
Whitening the trunk with a whitening agent to spray white and white on the trunk can reduce the damage caused by sudden changes in temperature, and can also kill some overwintering pests.
Strengthen the patrolling inspection staff to inspect the seedlings that are vulnerable to damage and, if necessary, strengthen the protection by wrapping. The timely removal of weeds and fallen leaves can eliminate potential fire hazards and reduce the source of pests and diseases.
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