Planting Robinia pseudoacacia in autumn is easy to survive.
In recent ten years, the spring drought in Lincheng County is serious, the air temperature rises quickly, and the ground temperature rises slowly, especially after the newly planted Robinia pseudoacacia seedlings are watered, the ground temperature is low for a long time, so that the aboveground part has sprouted and grown, but the root system recovers slowly and the survival rate of Robinia pseudoacacia decreases. In autumn, the temperature decreased gradually, the transpiration was low, the water content in the soil was stable, and the Robinia pseudoacacia seedlings accumulated rich nutrients. The root system of the tree has no natural dormancy period, and the root system of Robinia pseudoacacia planted in autumn can resume growth when the soil temperature is still high. As long as the permafrost layer is not thick in winter, the root system of the lower layer still has a certain growth, and it sprouts early and grows healthily in the next spring. The survival rate can reach more than 95%.
The planting time can be planted from defoliation to soil freezing, but it is better to plant as soon as the leaves fall.
Tree specifications are generally cut off for afforestation, and 30 cm of seedling stem can be retained.
The planting technology is 3-5 cm deeper than that in spring, and the soil should be stepped on. Immediately after planting, the trees are fully watered. After watering, the soil can be piled up for the winter, and it is best to bury them all. In the spring of the following year, water was watered again conditionally. After underwater infiltration, cover 5cm of soil, unconditionally, the mound will be slightly removed, exposing 10 cm of seedling stem.
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Sowing and raising seedlings of Robinia pseudoacacia in mountainous area
Robinia pseudoacacia is one of the main tree species for afforestation in mountainous areas. it is not only an important source of wood such as pillars, sleepers, cars and boats, agricultural tools, but also a good source of honey. First, nursery site selection and land preparation. The nursery land should choose the sandy loam land with flat terrain, good drainage, deep and fertile soil layer, and irrigation conditions. After the nursery land is selected, ploughing should be carried out in autumn, with a depth of 30 cm. The top of the early spring rake fine rake flat, while picking out the grass roots and stones. Combined with land preparation, 3000-5000 kg of rotten barnyard manure per mu.
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Planting techniques of Robinia pseudoacacia in autumn and winter
Robinia pseudoacacia is widely used in landscaping because of its strong adaptability, but it is found that some Robinia pseudoacacia do not grow vigorously after planting. The main technical points of Robinia pseudoacacia planting in autumn and winter are as follows: first, planting time: planting as soon as possible after all leaves fall in November every year. 2. Seedling specifications: generally, seedlings with a ground diameter of more than 1 cm are selected for afforestation in barren mountains, and large seedlings with a ground diameter of more than 2.5 cm are selected for greening on the four sides, and should be well preserved when planting.
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