A method for replacing high branches of walnuts in Guizhou karst area

Abstract

The invention discloses a top grafting and optimizing method for walnuts in a karst region in Guizhou. From the first and middle ten days of May to the first and middle ten days of July each year, lateral branches which are in open-center shapes and at the age of 1-2 years and good in branching are selected from 3-5-year-old large trees to serve as rootstocks, 2 / 3 of compound leaves on the rootstocks are cut off by means of pruning shears, 1 / 3 of compound leaves are maintained, after pruning is completed, the outer side surfaces, 10-15 centimeters away from main trunks, of the rootstocks are subjected to block grafting, one compound leaf is maintained at the position 20 cm above each grating cut, and 1.5-2cm petioles are maintained on sprouts during grafting. By means of the method, the maturation effect of individual plants of large walnut trees is fully utilized, and the plants surviving after grafting can flower and fruit earlier; since the rootstocks have complete root systems, sufficient water and nutrients can be supplied to scions, the growth and development of the grafted plants are excellent, the rootstock scions heal quickly, the survival rate of the large trees after grafting is high, the consumption of reproductive materials is low, the cultivation cost is low, the influence of weather in the method is small, stem cutting in advance is not needed, and the manpower is saved.

Description

technical field [0001] The invention relates to the technical field of tree cultivation, in particular to a method for replacing high branches of walnuts with high branches in the karst area of ​​Guizhou. Background technique [0002] Walnuts, also known as walnuts and Qiang peaches, are Juglandaceae plants that are light-loving, cold-resistant, drought-resistant, and disease-resistant. The requirements are not strict, and it is not suitable to pruning after the leaves fall and before germination, which is easy to cause wounds, and is suitable for most land growth. Lime-loving soil is common in places with deep soil layers on both sides of mountain valleys. Together with almonds, cashew nuts and hazelnuts, it is also known as the world-renowned "four major dried fruits". Walnuts are rich in nutrients, containing 15-20 grams of protein per hectogram, more fat, and 10 grams of carbohydrates; Flavin and other multivitamins. It is beneficial to the human body and is one of t...

AI Technical Summary

Problems solved by technology

[0004] At present, the propagation methods of walnuts are mainly grafting and cutting methods. However, in the existing walnut grafting technology, especially in the walnut grafting technology in the karst area of ​​Guizhou, the consumption of walnut propagation materials is large, the cost of asexual reproduction is high, and the grafting wound is healed. Slow, low survival rate of grafting, long period of flowering and fruiting after grafting

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