Fixed stem height of ginkgo tree: the grafted buds of ginkgo tree are actually short branches, except the terminal buds, all the branches from the grafted buds are oblique, so the height of the grafted part of ginkgo tree is also fixed stem height. After other fruit trees are dried, about 30cm under the cutting of the moon is used as a plastic belt, while ginkgo trees grow big branches by terminal buds, so the dry height of ginkgo trees is also the trunk height. The trunk height of ginkgo trees varies with seedling trees and grafted trees. The grafting height of ginkgo tree is the trunk height, and the growth height below the lowest branch of ginkgo tree is the trunk height.

The grafting height of ginkgo trees varies with the planting form, which can be divided into three types: short stem, medium stem and arbor stem.

According to the survey, in the ginkgo tree producing areas such as Tancheng County, Shandong Province, Taixing, Pizhou and Wuxian County, Jiangsu Province, the age of trees is more than 30 to 50 years, even reaching hundreds of years, and most of them are trees, and the trunk is more than 2 meters.

According to the survey, the middle stalk is superior to the middle stalk in terms of yield, but it is superior to the middle stalk in terms of making full use of space and giving consideration to production materials. In order to bear fruit early and yield high, ginkgo orchards advocated in the 1980s all adopted short-stem close planting, and the height of fixed stems was only 20 ~ 40 cm. Due to the short stem, with the development of production, the grafting height has gradually increased from 80 cm to 1.2 m, and even to 1.5 m. ..

When the planting of ginkgo trees is improved to be dual-purpose for fruit and timber, the density of orchards is also reduced, and the grafting height is increased to 2m, even to 2.5m (including intercropping with grain, mulberry, vegetables and fruits). Ginkgo trees used as shelter forests or economic forests are mostly grafted or 2.5m grafted.

Street trees are grafted or layered for more than 3m; Garden planting, grafting height should exceed the fence; The grafting height of ginkgo trees planted in front of and behind the house can be determined according to needs.