Ginkgo tree winter management is a necessary measure to ensure good growth in the second year.
1. Fertilization: Basal fertilizer is the basic fertilizer for supplying nutrients to Ginkgo biloba for a long period of time in one year, and it must be applied. Usually based on delayed organic fertilizer, combined with phosphate fertilizer and a small amount of available nitrogen fertilizer, organic fertilizer and more use of human and animal manure, green manure, grass, straw, etc., Phosphate fertilizer commonly used superphosphate. The optimum time for applying base fertilizer is autumn. Ginkgo biloba should be harvested immediately after harvest and it should be sooner rather than later. Fertilization methods can be used ring fertilization fertilization, radiation trench fertilization, strip trench fertilization. Apply alternately every year.
2. Irrigation: After the ginkgo trees are used in the base fertilizer in the autumn, the winter water is poured 1 times before the soil is frozen.
3, trunk coated with white trunk white can prevent freezing damage, prevention and treatment of trunk overwintering pests and diseases. The main body of the tree trunk is lime-water, plus appropriate amount of salt and lard. A small amount of yellow mud can also be added.
4. Pruning: Ginkgo tree pruning, especially winter pruning, is the main measure for the management of ginkgo trees. The flexible use of “short cuts, thinning, shearing, dumping, wounding, bending, support, pulling techniques†and other means . To achieve "tangible, invisible, invisible," so that the ginkgo backbone is stable, solid, branches suitable distribution. After years of cultivating ginkgo trees, it is necessary to pay attention to preserve the extension of the backbone branches and to trim the branches. To achieve "near the next dense, yang dense, thin inner dense" three-dimensional knot ginkgo. To solve the problem of ventilation and light transmission, cross-branches, overlapping branches, drooping branches, and pests and branches should be appropriately dissected and shrunk. Pruning of pruning natural trees at the end of many years must be taken into consideration in the transformation of trees, making full use of "supporting, pulling" and other means to open large branch angles, conducting appropriate branching and shearing, and focusing on ventilation, light transmission, and regeneration of branches and branches. Do not avoid too much shrubs, and turn big trees into small ones, causing “face injury†and “ring injury†in the center.
5. Pest control
(1) Combine pruning and cut pests and branches. Remove dead leaves from the tree in time to clear the lashings. Elimination of pests and wintering sites. Scratch the tree's old cracked skin and burn it.
(2) The disease spots on the ginkgo tree must be promptly scraped off, and the removed spot debris must be burned.
(3) Lime-sulfur mixture can prevent and control various ginkgo biloba diseases and insect pests. Especially when ginkgo leaves are defoliated, when the branches are all bare, it is better to use “light-drying†drugs to control the effect of Ginkgo biloba. Spraying should be done from top to bottom, from inside to outside, spray evenly, spray the whole plant.
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