Method for increasing survival rate of grafting of Yunnan olives

Abstract

The invention discloses a method for increasing the survival rate of grafting of Yunnan olives and belongs to the technical field of economic-forest cultivation. The method includes four steps of selection of stocks, scion collection and request, grafting and grafting-plant management. The results show that compared with methods for grafting of the Yunnan olives, the method has the advantages thatthe average survival rate of seedbed grafting is increased by 6.4%, and the average survival rate of adult trees in fine-breed top-grafting improvement is increased by 33.45%; the survival rate of grafting of Yunnan olive seedling nurseries is increased, the difficult problem that the survival rate of the Yunnan olive adult trees in fine-breed top-grafting improvement is low is solved, and broadapplication prospect in seedling cultivation and fine-breed improvement upgrading and improving production of the Yunnan olives is achieved.

Description

technical field [0001] The invention belongs to the technical category of economic forest cultivation, and specifically relates to a method for improving the grafted survival rate of Yunnan olives. Background technique [0002] Yunnan olive has strong adaptability to the ecological environment of tropical and subtropical dry-hot valley regions, especially has obvious functions of water retention and soil consolidation. It is one of the pioneer tree species for afforestation of barren hills in this area. In 2001, we began to carry out research work on the selection and breeding of Yunnan olive varieties and their supporting cultivation techniques in areas where ecological restoration is difficult in dry-hot valleys in Yunnan. So far, more than 10 excellent clones of Yunnan olive series in Gaoligong Mountain have been successfully bred. The innovative integration includes "a cultivation method of grafted seedlings of Yunnan olive container", "rapid construction technology of e...

AI Technical Summary

Problems solved by technology

Due to the obvious phenomenon of wounding in the dormant period of Yunnan olive, especially in the grafting of adult trees with better water and fertilizer conditions, the injury of grafting is more obvious, resulting in a low survival rate of grafting in the leaf-falling stage of Yunnan olive (the survival rate of grafting in nurseries is below 90%, and the survival rate of adult trees The survival rate of improved varieties is less than 40%)

Grafting during the vigorous growth period in summer and autumn (May to December) can improve the survival rate of grafting to a certain extent. However, in summer and autumn, the shedding branches of Yunnan olives are vigorously developed or mature, and manual pruning of the shedding branches is time-consuming and labor-intensive. Removing fallen branches can easily damage the scion buds, ear picking during the growth period stimulates the abnormal germination of the picking mother tree, and the germination of the year after the graft survives is not conducive to normal dormancy; at the same time, there are seedlings grafted in the nursery in summer and autumn. The thickening and growth did not stop, the thickness of the rootstock was insufficient, the graftability of the rootstock was not high, and the growth of the plant after grafting was poor, etc.