Why and when to girdle jujube trees, and what fertilizer is best?

In rural areas, many households plant peach trees, jujube trees and orange trees. After all, almost every rural household has land to grow some crops. For people who grew up in cities, they do not know much about how these crops grow. For example, why do jujube trees need girdling? What fertilizer is best for jujube trees? Next, the editor will answer these two questions for you.

Why jujube trees need girdling (timing)

Girdling the bark of jujube trees is also called "opening the armor". Opening the armor can increase the fruit set rate of jujube trees and raise fruit yield. Generally, opening the armor is carried out after trees of 5—8 years of age enter the full fruiting stage. What we now require is to increase the fruit set rate through opening the armor and girdling at 3—4 years of age, but it must not be done too early, and 1/3 of the nutrient branches must be retained to promote the tree's growth and strength. Our preliminary summary is that to judge whether opening the armor is suitable, the trunk diameter should be 5--8 cm or more as the standard for deciding whether to adopt the technique of opening the armor and girdling on jujube trees. Otherwise, opening the armor and girdling too early will cause the crown to shrink, shorten the life of the jujube tree, and turn it into a stunted old tree.

What fertilizer is best for jujube trees

1. Organic fertilizer based on yield: for young trees, the amount is generally about 10 kg per tree; for fruiting trees, it depends on the yield, generally applied at a fixed rate of "one jin of jujube, one jin of fertilizer", or 5-7 cubic meters per mu. If there is no barnyard manure or other organic fertilizer, bio-organic fertilizer can be used instead, generally 2.5-3 kg per tree.

2. Fertilizer based on tree size. Chemical fertilizer serves as a supplementary fertilizer to the base fertilizer. While applying organic fertilizer, adding some nitrogen, phosphorus, potassium and medium and trace element fertilizers can speed up the absorption of nutrients for early sprouting of the tree and ensure the needs of early spring growth and development of jujube trees. The application rate of chemical fertilizer is generally 0.5 kg of urea per tree, 0.5 kg of diammonium phosphate, and 1.5 kg of Yakefeng silicon-calcium-magnesium-potassium fertilizer. Increase appropriately for large trees and reduce appropriately for small trees.

3. Topdressing generally includes sprouting fertilizer, flower-promoting fertilizer, fruit-swelling fertilizer, etc., mainly chemical fertilizer. In the early stage, nitrogen and phosphorus fertilizers are mainly used; in the later stage, phosphorus and potassium fertilizers are mainly used.

Jujube tree planting techniques

1. Cultivation models: First, dwarf dense planting, mainly suitable for varieties that bear fruit early and have small tree types, with a plant and row spacing of 2 m × 3 m or 3 m × 2 m. Second, intercropping cultivation, mainly suitable for varieties with medium or large tree types that bear fruit later, with a row spacing of 8-10 m. Plant spacing 3-5 m. Other crops can be interplanted between the trees in the early stage.

2. Planting time: jujube trees can be planted throughout the dormant period from leaf fall to before sprouting the following year, divided into spring planting and autumn planting. According to many years of cultivation experience, when planting with 2-year-old and over-2-year-old root sucker seedlings, spring-planted ones should be watered thoroughly immediately, and the survival rate easily reaches more than 90%, while for autumn-planted ones, even if watered after planting, the survival rate is hard to reach more than 90%. However, for autumn-planted ones, even without watering after planting, the survival rate can still reach more than 70%, while for spring-planted ones, if not watered, the survival rate is clearly lower than that of autumn planting.

Jujube tree pruning techniques

1. Pruning of jujube trees is suitable in winter. In winter, jujube trees are in a dormant state, and there are many dead branches on the tree that should not remain. If they are not cut off in time, it is very unfavorable to the growth of the jujube tree the following year. Pruning jujube trees in winter: because jujube trees respond relatively slowly, pruning activities will not have too great an impact on them, and at the same time it can stimulate the growth of jujube trees the following year. Second, jujube tree pruning can also be carried out in summer. In summer, the branches of jujube trees grow very vigorously. To avoid nutrient consumption caused by excessive branch growth, the excessively growing jujube branches must be cut off. Only in this way can the high yield of jujube trees be ensured.

2. Jujube tree pruning techniques need to follow some basic choices, such as the principle of "promote in the front, control in the back, block upward and release downward". Specifically, it roughly means that in the early stage of jujube tree growth, that is, during 1-2 years, try not to prune it, but when the crown of the jujube tree reaches the height we want, we must prune and control it, that is, block the upward growth of the jujube tree and appropriately guide the jujube tree to develop in a horizontal direction.

In the above article, the editor also introduced what fertilizer is better for jujube trees, and why jujube trees need girdling. In fact, it is not an easy thing for many fruits to grow to maturity, because in the production process of fruits and vegetables, there will always be more or less problems, so in ordinary times we should cherish food and put an end to waste.