The thorn dragon bud can also be called thorn bud, Liaodong eucalyptus, dragon bud eucalyptus, eucalyptus, mainly distributed in China, distributed in Liaoning, Jilin, Heilongjiang, Gansu and other places, thorns buds and their young stems and leaves for vegetable consumption The taste is good, so it is very popular among consumers. Next, this article introduces the cultivation techniques of the thorn buds under the bud.
1 planting technology
1.1 Planting site selection
Selecting the sunny slope, semi-positive slope, and semi-shading slope site requires good drainage performance, slope ≤ 30, and it is forbidden to choose the blast outlet.
1.1.1 Planting under the crown: It is suitable for the natural secondary forest and larch plantation after the middle-aged forest. When the light is insufficient, the upper layer tending or pruning measures can be taken to adjust the forest canopy closure.
1.1.2 Planting in open space: In different stages of forest age, it is necessary to ensure that there are more than 20 m2 of open space in the forest for planting thorn buds. When the growth of the plants is negatively affected, pruning measures should be taken for the side trees.
1.1.3 Planting of forest margins: The forest margins that can be planted at different stages of forest age can be used to pruning the upper forest trees when the growth of some forest trees in the forest is negatively affected. At the same time, the shrubs that affect the growth of dragon buds should be removed in time.
1.1.4 Intercropping: New plantations such as Korean pine and larch can be intercropped, and the planting density of Korean pine can be designed to be 5m5m. Young forest tending adopts a full cut.
1.2 planting
1.2.1 Selection of seedlings: Choose I-level seedlings (plant height > 10cm, ground diameter > 0.6cm) or class II seedlings (seed height > 8cm, ground diameter > 0.4cm) for afforestation.
1.2.2 Planting time: in the middle and late April of spring, when the soil thawing depth is ≥25cm; in the autumn of October-November, the thorns are deciduous until the soil is frozen;
1.2.3 Nutritional cup seedling planting time: spring or rainy season.
1.2.4 Seedling treatment: Before the planting of bare root seedlings, the seedlings should be treated with roots, mash mud, moisturizer and other techniques; the seedlings should be irrigated 2 times before the afforestation.
1.2.5 Planting method: adopt the afforestation method of “three burying two steps and one seedlingâ€; when planting, the seedlings should be vertical, and the depth should be appropriate. After filling 1/2, the seedlings should be stepped on, and finally covered with a layer of topsoil; The hole size is 30cm30cm30cm, the planting density under the crown is 1.8m0.6m; the planting density in the forest is 1.0m0.6m; the planting density is 1.5m0.6m or 1.5m1.0m; intercropping is carried out in the new plantation. The plant spacing is 0.6m.
2 tending management
2.1 cutting and weeding
The first year after afforestation 2 times, the first time in early June, the second time in late August, mainly to cut off bush weeds and rattan wrapped around the plant; the second year of spring expansion 1 time, tending 2 times, the time is the same; the 3rd year of raising is carried out in accordance with the provisions of the "Regulations for Forest Breeding".
2.2 trimming and drying
2.2.1 Trimming time: The tree is trimmed in December of the second year.
2.2.2 Trimming method: cut at a distance of 20~40cm from the ground, retaining 4~6 buds; in the third year of spring, when the buds sprout, retain 2~3 strong buds on the remaining branches, the remaining buds Cut off or erase; in the 4th year, trim according to the above method until the plant is dead or the upper forest is closed.
2.3 update rejuvenation
2.3.1 Renewing and rejuvenating method: From the 4th year, 1~2 root saplings are kept around the original plant, and 1~2 plants are repeatedly incubated in the 5th year. After harvesting in the 6th spring, the old plants are removed. Each plant can retain 3 robust shoots.
2.3.2 Root removal and mites: Keep the new sprouts plant strong, no pests and diseases, and damage the roots at 10~15cm away from the old plants. After rooting, stick to the ground and plow the other root seedlings.
3 harvesting time
The buds of the buds of the thorns are harvested from late April to mid-May, and the second buds are harvested in late May, that is, the buds are not fully unfolded, and the tender stalks are not hardened.
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