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. Technical points of Robinia pseudoacacia planting in autumn and winter:
First, planting time: plant as soon as possible after all the leaves have fallen in November every year.
Second, 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 afforestation on the four sides, and the complete root system should be retained when planting, with a root width of not less than 20 cm and a length of not less than 25 cm.
Third, planting method: adopt the method of planting along with digging holes. When digging holes, separate the upper mature soil from the bottom raw soil. The planting depth is the same or slightly deep as the burying depth of the seedlings. When filling the soil, you should first fill the cooked soil and then fill the raw soil.
Fourth, precautions: before planting ①, we should pay attention to trim the root system, and cut off the rotten root and split root. The stem of ② can be cut along with planting, or it can be cut off again after 7 days of planting. The height of ③ truncation is 3-5 cm from the ground. After the cut, the soil should be cultivated and buried.
Planting at the end of autumn and the beginning of winter, first, immediately following the rainy season, the soil moisture is better than that of spring plum, which is conducive to root growth; second, the root system has been restored and grown for a period of time before the advent of severe winter, and the slow seedling period in the next spring is short, and the root system grows when the temperature is suitable. New buds germinate quickly and grow into new branches, thus improving the survival rate of planting.
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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. There is no natural dormancy period for tree roots, and the roots of Robinia pseudoacacia planted in autumn can resume growth when the soil temperature is still high, as long as the permafrost is not thick in winter.
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Measures for land preparation and planting of mulberry and black locust mixed with returning farmland to forest in the plain?
Robinia pseudoacacia adopts burrowing soil preparation with specifications of 80 cm by 80 cm, row spacing of 3 meters by 5 meters, planting density of 45 plants per 667 square meters, planting in spring and autumn, applying sufficient base fertilizer before planting, watering after planting, and planting mulberry in spring, rainy season or autumn.
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