Eucalyptus breeding technology

The banyan tree is a large deciduous tree of the family Asteraceae. The tree height can reach 30 meters and the diameter at breast height is more than 1 meter. The material is fine, the texture is straight, and it does not crack, and it is resistant to decay and moisture. It is used for architecture, furniture, shipbuilding, bridges, sculptures, musical instruments. Used timber. The leaves, bark and seeds are all Chinese herbal medicines. The young leaves are edible. The flowers can be fried and extracted with aromatic oil.
The majestic tree is majestic, with straight trunks and beautiful flowers. It has strong resistance to sulfur dioxide, chlorine and other toxic gases and is a good timber tree and landscaping tree species.
Sowing seedlings Seeds are planted on robust mother trees and elite trees 15 to 30 years old. From April to May of the flowering period of eucalyptus, from September to October, the fruit turns from yellow-green to gray-brown. When the tip is micro-cracked, the seed matures. The fruit is harvested, dried and dried, and then threshed. The eucalyptus planting rate is low, about 10%, purity 75% to 80%, germination rate 40% to 50%, dry grain weight 4 to 5 grams, 200,000 seeds per kilogram.
The land preparation for bed-planting was small and the young shoots were tender and weak. The soil was poorly grounded, and the soil was made into boring beds. Choose land plots with high topography, flatness, good drainage, deep soil and irrigation conditions. Combining farming and applying base fertilizer, 5 kg of ferrous sulfate was applied to disinfect the soil.
Seed germination treatment for the seed germination, rapid emergence, germination before sowing. Soak the seed with warm water of 35~C5540~C until it cools, and soak for 24 hours to allow the seeds to suck enough water. Then remove the seeds and mix with 2 times fine wet sand, stack the indoor 28~C55 and 30cC for germination, and keep turning and spraying to maintain a certain humidity. About 8 to 10 days, when the seed has 30% of 5540% split mouth or embryo white, you can sow.
Sowing period and sowing general North China is appropriate in early April, such as the use of thin film wet bed moisturizing, can be planted in advance to late March. Before planting, the trampoline should fill enough water to spread the shoots in a row, with a spacing of 20 to 25 centimeters and a seeding rate of 1 to 2 kilograms per acre. After sowing, the rotted horse dung, fine wet sand and fine soil were 1/3 covered and sieved and covered with a thickness of 0.5 cm. The seeds were not suitable. After the earth-covered soil, a small shed of membranes is erected on the boring bed surface to increase the temperature and moisturize the soil, creating favorable conditions for the emergence of seedlings and growth.
Seedling management Eucalyptus seedlings have shallow roots before two pairs of true leaves. Small irrigation should be done to prevent the water from overwhelming the seedlings and keep the bed moist. When there are three to four pairs of true leaves, watering is stopped to start the seedlings, and the distance between the seedlings and the plants is 15 cm to promote seedling growth. Generally in July, the seedlings enter into a vigorous growth period. Every 20 days, about 10 kg of available nitrogen fertilizer or 400 to 500 kg of decomposed human waste is applied per acre, and watering, cultivating, weeding, and loose soil are managed. Eucalyptus planting seedlings can reach a height of 75 to 100 cm a year and produce 1 to 15,000 mu per mu.
The roots of eucalyptus roots are strong and can be used for rooting seedlings with big tree roots and seedling roots. Collect 1 to 2 cm thick roots, cut 15 to 20 cm roots, and descend flatly. The excavation is carried out before the thawing in the spring and before the germination, so that the excavation, cutting, and burying are carried out. In the autumn, the roots should be stored in the wet sand and stored in spring. From late March to early April, 15 days before the burial, Xiangyang was selected and the species was mixed with wet sand to germinate. Gradation of thick and thin strips ensures that the seedlings are neat and tidy. Oblique burial: head up, small head tilted down 40', the upper end of the root level with the ground, buried 1 to 1.5 cm buried, compacted. In arid areas, it is possible to cultivate ridges 15 to 20 cm high. When the buds have just sprouted, they should be ridged and do not injure them.
We can't distinguish the top and bottom roots by the flat burial method. Place the root bar flat on the buried trench, cover the soil 1 to 1.5 cm and compact it. When the seedling height was 10 cm, the sprouts were removed, leaving only a well-developed and prosperous bud. After the shoots were flushed, they were irrigated once every 20 to 30 centimeters, and 8,000 seedlings per acre were produced. The spacing of the transplanted large seedlings was 50x50 cm, and 1600 to 2200 seedlings were produced per acre.
After cutting the seedlings and defoliating the eucalyptus leaves, collect the root slats and the annual branches to grow the slivers and cut them to 15 to 20 cm. After grading, every 50 or 100 bunches are tied into a bundle and erected in an open bunker. A layer of cuttings is buried in a layer of wet sand to cover the soil at the pit entrance. As the earth is thickened by cold weather, a vertical sill in the pit makes it easy to breathe. Hardwood cuttings are preferred from March to April in spring, and cuttings can be treated with ABT rooting powder to increase the survival rate. The spacing of the cuttings is 20x30 cm. After the insertion, the management is strengthened. A small shed of membranes is erected on the insertion bed to promote rooting and growth. The mu was 1 to 1.5 meters in that year.
Grafting nursery seedlings in Shandong Baihe Lake Photosynthesis Garden Co., Ltd., in the late autumn of 2003 and late spring in 2004, when the end of the tree, the use of eucalyptus seedlings as rootstock, from the excellent mother plant of eucalyptus, harvesting shoots from strong year-old shoots, Xylem bud connection method. Eucalyptus grafted seedlings have strong adaptability and fast growth, and they show good resistance. The survival rate of grafting is as high as 85% to 90%. The eucalyptus trees cultivated in that year were 3 to 3.5 meters high in grafted seedlings, and the maximum diameter reached 5 centimeters. The distance between rows was 50 x 50 centimeters, and 1600 to 2200 plants were produced per acre, which was very effective.
Pest control larvae larvae feeding young shoots, damage branches, adult body light grayish brown, white wings. Control: Combine pruning to cut off branches with insects from the base. When the adult emerged, it was sprayed with dipterex or marathon 1000 times, killing adults and newly hatched larvae.
Root-knot nematode disease usually damages the main root, lateral roots, and small roots of seedlings, and the roots decay, causing the plants to die. Prevention: Cultivation of disease-free seedlings, no rooting or root-reproduction from the nursery. Rotation is an effective measure to control root worm disease.

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    Yanchi County Yijian Biotechnol Co.,Ltd
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