Seedling growing technology for grafting white bark pine on Chinese pine

Abstract

The invention provides a seedling growing technology for grafting a white bark pine on a Chinese pine. The two-to-three-year Chinese pine is used as tree stock, and a branch, three to four centimeters away from the branch growing point, of the current-year white bark pine is used as a scion; the greenhouse grafting time is from the middle of March to the middle of April and the open field culturing time is from April 20th to the middle of May; grafting is conducted on the position, nine to eleven centimeters away from the ground, of the base portion of the Chinese pine; grafting is conducted in a greenhouse, and shading is needed to avoid direct sun radiation; the temperature in the greenhouse is controlled to be fifteen to twenty five DEG C; the relative humidity is controlled to be sixty to eighty percent; the bark grafting method is adopted, and a film is used for tightening and wrapping the grafted part; during grafting, a sprouting mother stem, namely the growing top of the Chinese pine, is maintained, and after the pine survives, the maintained mother stem is cut off; in June, a sapling which survives through grafting is moved out of the greenhouse and transplanted into a field; before the sapling is moved out of the greenhouse, the film which is used for tightening and wrapping the grafting part is removed. According to the seedling growing technology for grafting the white bark pine on the Chinese pine, the advantages of the Chinese pine and the white bark pine are combined, the planting cost is lowered, the survival rate is improved, the growing period is greatly shortened, and the popularization range is enlarged.

Description

technical field [0001] The invention relates to the field of plant seedling raising technology, in particular to a seedling raising technology of grafting Chinese pine with white bark pine. Background technique [0002] White bark pine, also known as white pine, is a pinaceae, evergreen tree with whorled branches, prominent winter buds, numerous bud scales, and imbricate arrangements. Arbor, up to 30 meters, 3 meters in DBH. The branches are beautiful, and it is a rare and precious tree species unique to our country. However, it grows slowly, is a light-loving tree species, and is resistant to barren soil and relatively dry and cold climates; it grows well on calcareous soil and loess with warm and cool climates, deep soil layers, and fertile loess. Light-loving, drought-tolerant, dry and barren-resistant, and cold-resistant, it is the main coniferous tree species that can adapt to calcareous loess and mild saline-alkali soil among pine tree species. It grows most luxuria...

AI Technical Summary

Problems solved by technology

[0003] Chinese invention patent CN1994052A discloses a seedling raising process using black pine grafted with white bark pine. On the one hand, this seedling raising process is suitable for the Jiangbei region of my country, and is not suitable for planting in colder areas north of the Yellow River in my country, and its promotion has certain limitations.

On the other hand, the black pine skin is rough and not smooth, which makes it unsightly. The position of the white bark pine grafted to the black pine is relatively high, which makes the skin rough after grafting and loses its ornamental value. At the same time, it is not suitable for planting in colder regions.