Cultivation techniques of Ginkgo biloba

Ginkgo tree is a kind of tree with high ornamental value. It will blossom in April and bear a lot of fruit in October. At present, many green areas have been planted. What are the cultivation techniques of Ginkgo biloba?

1. Site selection: ginkgo biloba likes light, and the sunny slope with a small slope should be selected as the woodland. The requirement of soil condition is not strict, but the neutral or slightly acidic soil with thick layer, moist and fertile soil and good drainage is better.

2. Rational allocation of pollination trees: select the plants with strong terminal buds, full lateral buds and no diseases and insect pests, and then select some male plants with the same variety and florescence as the female plants, the ratio of male to female plants is 25-50:1. The configuration mode is 5 or 7 square center type, or four-corner configuration.

3. Reasonable close planting: in the early stage, 88 or 63 plants were planted with row spacing of 2.5 × 3 meters or 3 × 3.5 meters per mu, and transplanting was carried out after row closure. The row spacing was first moved from the plant spacing to 5 × 3 meters or 6 × 3 meters, 44 or 31 plants per mu, and then transplanted into 5 × 6 m or 6 × 7 m row spacing every few years. 22 or 16 plants per mu.

4. Planting time: ginkgo biloba is mainly planted with leaves in autumn and before leaf in spring, and it is planted from October to November in autumn, which can make the root system of seedlings have a longer recovery period and prepare for shoot germination in spring in the second year. Planted before germination in spring, because the aboveground parts germinated quickly and the root system did not have enough time to recover, the growth was not as good as that in autumn.

5. Planting method: after the nest is dug, the topsoil should be backfilled and fermented fertilizer containing calcium superphosphate should be applied. When planting, stretch the root system of the seedling naturally, align it with the left and right seedlings before and after, and then fill in the form. Planting depth is appropriate to cultivate the soil to the original soil of the seedlings printed with 2~3cm, do not bury the seedlings too deep. After planting, the root water was poured in time to improve the survival rate.