Method for shortening juvenile span by grafting hybrid seedling rootstocks

Abstract

The invention discloses a method for shortening the juvenile span by grafting hybrid seedling rootstocks, and the method comprises the following steps of: (1) scion preparation: collecting full buds of biennial hybrid seedlings as scions, wherein the buds are located at places 20-30cm downward from the tops of the trunks of the biennial hybrid seedlings; (2) rootstock preparation: horizontally shearing the lower ends of the roots of the trunks of the biennial hybrid seedlings to serve as rootstocks, wherein the shearing places are 10-15cm upward from the ground; (3) grafting: directly grafting the collected scions on the rootstocks by using a cleft graft; and (4) wrapping: tightly wrapping all the sheared edges by using plastic films. According to the method, the heights (namely, the juvenile span) of the fruiting parts of the hybrid seedlings can be decreased by more than 1.2m and then the whole heights of the trees are decreased, so that the wind resistance of the seedlings is strengthened and the problems of tree lodging, branch broking, fruit falling and the like are prevented, convenience is brought to the field operations such as fruit thinning, bagging, pruning and the like, and the field management workers of the hybrid seedlings are decreased.

Description

technical field [0001] The invention relates to a method for grafting hybrid seedlings with top buds and root stocks to shorten the child's length, and is especially suitable for conventional pear hybrid breeding for selecting and breeding excellent new varieties from a large number of hybrid seedlings. The method is also applicable to the management of hybrid seedlings and the selection of new and superior varieties in the hybrid breeding of other Rosaceae fruit trees. technical background [0002] Possessing the size of the innovation ability of fruit tree germplasm resources, the number of high-quality new varieties selected and bred, and the excavation of characteristic fruit trees will determine the competitive advantage of my country's fruits and their products in the international market, and will be one of the key factors for the sustainable development of fruit tree production . Pear is the third largest fruit tree in my country. It is deeply loved by people. It is ...

AI Technical Summary

Problems solved by technology

However, compared with other advanced pear producing countries, my country still has a certain gap in terms of variety renewal, fruit quality and participation in international fruit market competition. Among them, the proportion of late-maturing varieties is too large (about 55%), and the proportion of early-maturing varieties is relatively small (less than 20%); there are many traditional local varieties and relatively few new and high-quality varieties. The problem of aging of varieties in some areas is prominent, and the market share Falling faster

Normally managed hybrid seedlings generally have a plant height of 3-4m at the end of childhood, and generally reach 2-2.5m in childhood. This biological characteristic causes the flowering and fruiting parts to be too high from the ground, and the planting density is high, which is difficult for field management. And the screening of excellent plants in the later stage caused great inconvenience. Tools such as bagging and picking were required, which was time-consuming and labor-intensive.

Too long a child's journey also leads to too high plant height and poor wind resistance. After fruit setting, it is easy to cause problems such as fruit drop or branches lodging and breaking, and the space utilization rate is low.