The latest course of cultivation techniques of Sabina vulgaris

Dragon cypress for cypress juniper, alias: around dragon cypress, screw cypress originated in the northeast of china, north china and japan, korea and other places, south north china and east china cities are cultivated. All the leaves of Jinlongbai belong to the same genus, and the leaves at the end of the branches are yellow. There is no upright trunk in the ground, and the plants are flat in place, mostly phosphorus leaves.

biological habit

Sabina is a cypress family, for the cultivation of Sabina varieties. Evergreen trees, up to 8 meters high, trunk straight, tree was narrow cylindrical, twigs twisted on the extension, hence the name. Branchlets dense, dense leaves, all for the scale leaves, young leaves yellowish green, green after the old. Cone blue-green, fruit surface slightly powdery.

Long Bai Xi deep fertile soil, good drainage requirements, avoid wet waterlogging, otherwise it will cause yellow leaves, poor growth. It grows slowly when it is young, but it grows faster after 3-4 years. After the trunk reaches 3 meters high, the growth weakens gradually.

Long Bo Xi Yang. Where the drainage is good and the soil is deep, it grows well. Drought-resistant, summer and autumn as long as the rhizosphere or seedbed cover, generally do not drench drought resistance is rarely dead seedlings, but to promote growth, frequent fertilizer, water, its annual growth can be increased by 50 cm. The main branches of cypress have strong extensibility, but they do not develop outward in Jiangnan and rotate upward around the trunk. The branches are closely arranged. The whole tree is like double dragons holding columns. Therefore, the lower branches should be properly preserved. Do not cut off or damage them at will, otherwise they will form hanging seedlings, which will greatly damage the view. Therefore, they are generally not pruned and allowed to grow naturally.

Dragon cypress shape in addition to natural growth into conical shape, but also some of its climbing and kneading plate tied dragon, horse, lion, elephant and other animal images, but also some trimmed into spherical, drum, hemispherical, single value or row pole, group planted in the garden, more planted into a hedge, after shaping and pruning into a straight ridge shape, can show its low, plump, meticulous, fine. Dragon cypress branch twist spiral hold stem and born, unique, ornamental value is very high, widely cultivated throughout our country.

cultivation and management

The methods of asexual propagation of Sabina longissima include grafting, branch grafting, cuttings, layering, etc., each with its own advantages, which are described as follows:

1, close to: close to the survival rate is high, into seedlings fast, the disadvantage is that the number of reproduction is limited, procedures and management is more troublesome, because the mother tree is tall, more inconvenient to operate, but for a small number of reproduction, this method can still be used. The rootstock can be planted with Sabina chinensis, Sabina chinensis, Sabina chinensis and Sabina chinensis. It is carried out in March and April. It has been fully healed in August and September, and can be cut off from the female parent for transplantation. For specific operation, please refer to the article "Connecting."

2, early spring branch: in February of early spr, 2-year-old Platycladus orientalis is taken as rootstock, 1-2-year-old branches of Chinese cypress which grow healthily and are free from diseases and insect pest are selected as scions, that scions are 5- 10cm long, needles at the lower part of 2- 3cm are removed, one side of the scions is cut straight, the scions are 2- 3cm long, and the reverse side of the scions is cut obliquely, the scions are 2- 4cm long; Rootstock can be cut from the graft, and then cut straight from one side of the cross section, 2-3 cm long, pay attention to a little xylem, and then cut the scion into the rootstock, and make one side of the cambium aligned with each other, and then with plastic film to tie the junction. In order to make the scion die without losing water before survival, a small plastic bag can be sleeved on the scion. After about 2 months, the top bud of the scion germinates, which proves that the wound has healed well, and the bag can be removed and normal management can be carried out. In addition, in the growth period can tear skin mosaic joint. This method of grafting survival rate is also very high.

propagation method

Dragon cypress is a valuable garden tree, crown cylindrical, like a dragon, shaped like a tower suitable for planting around the high square, or on behalf of potted cloth. It has absorption function and dust removal effect on various harmful gases. Although cypress can bear seeds, it is not easy to sprout. Propagation methods are mostly cuttage and grafting two kinds. Grafting propagation period of Sabina chinensis is suitable from mid-February to early March in spring, and from late September to early October in autumn. There are 2-year-old Platycladus orientalis as rootstock, grafting methods are:

1. Ground grafting: The aboveground part of the rootstock should be retained, the soil of the rootstock part should be dug out by 3-5 cm, and the rootstock should be cut to a depth of about half. The scion is selected from the middle part of a biennial branch, the length of which is about 8 cm, the needle at the base is removed by one third, one side of the cut is cut to be about 1.5-2 cm, and the other side is about 0.6 cm, the scion is inserted into the cut of the rootstock, the cambium of the two layers is aligned, the plastic film is tightly fastened, and the soil is choked by 3-5 cm, grass is covered to prevent drought, and a shed curtain is needed to temporarily shade.

2. Digging and grafting: After digging up the rootstock, properly prune the roots and prune the branches. The method of digging and grafting is the same as that of ground grafting, but after grafting, plant it in time and choke the soil to the top 3 cm. After grafting, the healing process from the beginning to survival is slow, and the spring grafting begins to heal in May, so the rootstock branches and leaves should be gradually cut off. After grafting, in addition to proper shade, prevention of drought and wind blowing, and keeping a certain humidity, it is also necessary to prevent rain intrusion within half a month after grafting. Generally, the survival rate can reach more than 75%.

pest control

In addition to the common pear red star disease, the cutting seedbed substrate is not clean or repeated use, easy to occur purple feather disease, can be controlled according to the above methods. Common insect pests are cloth moth, should be in early June larvae have not yet spread when spraying 1000 times 98% crystal trichlorfon to treat it.