Video of ginkgo tree planting technology

Ginkgo biloba, also known as ginkgo, Gongsun tree, duck foot tree, etc., is a deciduous tree of Ginkgo biloba family. It is the oldest surviving plant of gymnosperms left over from the Quaternary glacial movement. It has the laudatory name of living fossil. It is an excellent tree species in modern landscaping. It is often used for park and street cultivation. Let's take a look at the ginkgo tree planting technology video!

The growth habits of ginkgo trees

Ginkgo trees like appropriate wet and good drainage of deep loam, suitable for growth in subtropical monsoon areas with superior hydrothermal conditions, in acidic soil, calcareous soil can grow well, and neutral or slightly acidic soil is the most suitable, not resistant to water, more able to drought, only in too dry and stony slopes or low wet land growth is poor. Early growth is slow, Mongolia tiller sex is strong. Female plants generally begin to bear fruit about 20 years old, and 500-year-old trees can still bear fruit normally. Generally, it sprouts and spreads leaves from late March to early April, blossoms from early April to mid-April, matures from late September to early October, and leaves from late October to November.

Propagation Technique of Ginkgo biloba

1, cuttage propagation: cuttage propagation can be divided into old branch cuttage and young branch cuttage, old branch cuttage suitable for large-area greening seedlings breeding, young branch cuttage suitable for family or garden units with a small number of seedlings breeding, old branch cuttage is generally in spring March to April, young branch cuttage is in late May to mid-June.

2, plant propagation: plant propagation is generally used to cultivate rootstocks and green seedlings, easy to sprout, especially 10~20 years old trees sprout the most, the method is to remove the soil around the rhizosphere, with a knife to cut off the tiller with fibrous roots from the mother plant, planting and cultivation separately.

Grafting propagation: Grafting propagation is mostly used for fruit production. Green branch grafting can be carried out from late May to early August, but grafting cannot be carried out under high temperature and drought weather conditions, especially at noon on sunny days, and grafting should be avoided on rainy days.

4. Sowing and reproduction: Sowing and reproduction are mostly used for large-area greening seedlings or making cluster bonsai. After harvesting seeds in autumn, remove the outer seed coat and dry the seeds with pericarp. They can be sown in winter or spring in the following year. If spring sowing, must first carry out mixed sand stratification germination. When sowing, the seed embryo is placed horizontally in the sowing ditch. After sowing, the soil is covered with 3~4 cm thick and compacted. The seedlings can grow to 15~25 cm high in the same year.

Cultivation method of ginkgo tree

1. Land selection: Ginkgo biloba has a long life span and long-term benefits from one planting. Therefore, land selection is very important. Sunny slope with small slope should be selected as afforestation land. The requirements for soil conditions are not strict, but neutral or slightly acidic soil with thick layer, moist and fertile soil and good drainage is better.

2. Pollinating tree configuration: Ginkgo biloba is a dioecious plant. In order to achieve high yield, pollinating trees should be reasonably configured. Male plants with the same variety and flowering period as female plants should be selected. The ratio of male to female plants should be 25~50:1. The configuration mode should be 5 or 7 plants in a square center, or it can be configured with four corners.

3, seedling specifications: improved seedlings are the material basis for early and high yield of Ginkgo biloba, should choose a height diameter ratio of 50:1 or more, the main root length of 30 cm, lateral roots Qi, the growth of new shoots in the year more than 30 cm seedlings for planting. In addition, seedlings must have robust terminal buds, full lateral buds, no pests.

4. Reasonable dense planting: Ginkgo biloba grows slowly in the early stage, and dense planting can improve land utilization rate and increase yield per unit area. Generally, 88 plants or 63 plants are planted per mu with a plant spacing of 2.5× 3m or 3× 3.5m. After sealing, transplanting is carried out. First, one row is moved from the plant spacing to a plant spacing of 5× 3m or 6× 3m, 44 plants or 31 plants per mu. Every few years, one row is transplanted from the original row spacing to a plant spacing of 5× 6m or 6× 7m, and 22 plants or 16 plants are planted per mu.

5. Planting time: Ginkgo biloba is mainly planted with leaves in autumn and before leaves in spring. Autumn planting is carried out from October to November, which can make the roots of seedlings have a long recovery period and prepare for the germination of the ground in the spring of the next year. Planting before germination in spring, because the aboveground parts germinate quickly and the roots do not have enough time to recover, so the growth is not as good as planting in autumn.

6. Planting method: Ginkgo planting should dig planting nests according to the designed plant spacing, with the specification of 0.5~0.8×0.6~0.8 meters. After digging the nests, topsoil should be backfilled and fermented fertilizer containing calcium superphosphate should be applied. When planting, the seedling roots will naturally stretch, align with the front, rear, left and right seedlings, and then fill in the form above solid. The planting depth should be 2~3 cm from the soil to the original soil of the seedlings. Do not bury the seedlings too deep. After planting, irrigate root water in time to improve survival rate.

Disease control of Ginkgo biloba

1. Stem rot

[Symptoms] In the early stage of stem rot infection, the epidermis tissue and underground root tissue at the base of the stem close to the ground turn brown, producing water-stained disease spots. The above-ground leaves lose green and droop, and then the diseased parts spread to surround the stem base and expand to the upper part of the seedlings, finally causing the whole plant to die. At this time, the leaves are orange and droop but do not fall off. Disease to the root extension, so that the root phloem brown rot, all rot cortex, its white mycelium, pull out seedlings, visible root cortex off.

[Control] ① Ginkgo stem rot prevention focuses on soil treatment and seedling disinfection, and organic fertilizer should be fully decomposed.② Cultivate healthy seedlings, improve the disease resistance of seedlings, irrigate and loosen soil and weed in due time, and do not damage the stems of seedlings when loosening soil and weeding.③ Strictly control moisture to prevent excessive humidity and dense seedlings.④ In winter, it is necessary to prevent freezing injury and improve seedling resistance. Dead seedlings found should be removed in time and burned in a centralized manner to avoid spreading. 5 Nursery land should not be located in low-lying water, using sufficient manure or cottonseed cake as base fertilizer, can reduce the incidence. After getting sick, spray with 50% carbendazim wettable powder 200~300 times, spray once every other week, a total of 2~3 times.