Tree Shape Transformation in Densely Planted Jujube Orchard

Abstract

The invention discloses a close planting date garden tree form improving method. The method comprises the steps such as secondary trunk cutting, spacing, empty space supplementing, pile reserving and secondary pinching, large core picking, retracting, secondary cutting back, pull branch matching, falling head height controlling and triple purity. According to the red date nutrition growth characteristics and reproductive growth stage characteristics, the core point of the low-yield and low-density date garden improvement in the nutrient growing period is placed on the tree form improvement to increase the photosynthetic area, improve photosynthetic strength and achieve ventilation, light transmitting, reasonable nutrient allocation and high timeliness. The tree form improvement is finished in the end of May, the contradiction for fighting for nutrient between shoots, flower and fruit is relieved, the photosynthate is used for cultivating robust frameworks and enabling blossom and fruiting as much as possible, the difficulty of flower and fruit disease and insect damage and crop smothering preventing is lowered, after the flowering phase is achieved in June, the management measure is concentrated on flower and fruit, and the fruit-setting ratio, the yield, the quality and the production efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of forestry shaping and pruning, in particular to a tree shape transformation method in a densely planted jujube orchard. Background technique [0002] Jujube is a strong light tree species with long flowering period, overlapping growth periods and fierce competition for nutrients. Especially in densely planted jujube orchards, it is more difficult to set and preserve fruit, and it is difficult to achieve high quality and high yield. In recent years, different planting densities have been formed in the orchard construction of live-seeded wild jujube. For jujube trees that grow upright, lack high-yield skeletons, have excessive vegetative growth, have closed canopy, poor ventilation and light transmission, slow crown expansion, and low space utilization, the jujube trees can be cut and thinned. Densify, pick the big heart, retract, cut short, drop the head, smear the buds, top the heart, pull the branches, an...

AI Technical Summary

Problems solved by technology

[0003] In the densely planted jujube orchards, due to inadequate pruning and shaping or not pruning in some years, the stems stand alone, the branches are few, the branches are too high, and the skeleton of the tree is basically missing; some pruning is too heavy and the crown is slow to expand; , consumes nutrients in vain, affects ventilation and light transmission; attaches importance to winter pruning, despises summer pruning, does not smear buds, topping, and pull branches in time, excessive vegetative growth, secondary branches are thin, and fruit setting is difficult; plant growth space is limited, in order to control vegetative growth However, the workload of retracting and pruning in winter and topping in summer is getting bigger and bigger. Farmers have not mastered the plastic pruning technology, the tree shape is cultivated slowly, and there are few effective fruiting parts; The high proportion of skinned jujubes, poor quality and low selling price are the key factors affecting the yield and quality of jujubes