Off-year of pistachio trees

What is the Off-year of pistachio trees?

Off-year of pistachio trees is a definition of the amount of fruit of pistachio trees that increases in one year and decreases in the next year, and it is common among pistachio gardeners that the trees will be full one year and low the next.

Off-year of pistachio trees

In general, this is not just among pistachio trees, and sometimes among gardeners and farmers, off-year means high yields in one year and low yields or low yields the following year.

What is directly visible in between are the buds and flowers of the tree. For this reason, the number of buds and flowers is high in the full year and the number of buds and flowers is low in the low load year.

A tree that has lost its buds due to weakness and fatigue can no longer produce the right crop. Therefore, no product will be produced due to the lack of reproductive buds; That is, the tree is in its infancy year.

Cause of Off-year of pistachio trees

The reason for the off-year phenomenon of pistachio trees is that in a fruitful year, a large number of buds and flowers grow, which originally had to be produced the following year and for the next year’s crop. The existing reasons are falling apart.

If we want to discover the reason for the pistachio trees to age, we must look for the cause of the growth of more than the reproductive buds in the tree. In fact, as mentioned above, overgrowth of buds causes the buds to receive the potential of the tree to bear fruit next year, and even with a lack of nutrients for the tree, many of these buds are forced to fall.

The fruit of the tree is actually in the middle of the way the buds are fed by the tree, and this causes the tree to be forced to empty the flowers to feed its buds. This reduces the potential for next year.

The main factors that cause Off-year of pistachio trees depend on the following factors:

• Shortage and competition for food resources in the tree
• Size and surfaces of tree leaves
• Size and growth of pistachio kernels
• The effect of hormones originating or accumulating in the brain
• The level of carbohydrates available to the tree
• Number of pistachios on the branch that has the product

Ways to prevent the Off-year of pistachio trees

To solve the problem of yearling, most of the reproductive buds must be preserved in fertile years. This is possible only with adequate and proper nutrition of the tree.

In a fruitful year, enough nutrients should be available to the tree so that in addition to providing the nutrients needed for the fruits, part of it reaches the next year’s sprouts and the fruits have to consume the nutrients of the sprouts of the year. Do not be later.

1-Planting suitable pistachio cultivars

According to scientific and experimental studies, it should be said that the type and cultivar of pistachio trees that are planted have a significant effect on the Off-year of pistachio trees. In fact, it can be said that this is a genetic issue.

For example, Ahmad Aghaei cultivar and Fandoghi cultivar have less Off-year of pistachio trees compared to some cultivars such as Shah Pasand and Italian. Table 1 shows the annual percentage of some pistachio cultivars.

Table No. 1 percent of annual pistachio cultivars:

2- Adequate and proper nutrition of pistachio tree

One of the best ways to preserve the flowers grown this year and reduce the annual effect of pistachio trees is to use fertilizers and nutrients scientifically, calculated and sufficient for pistachio trees.

The main cause of falling flowers, as mentioned, is the lack of nutrients, so with proper fertilization, we first increase the yield and at the same time prevent the next year’s low rainfall.

3. Pruning fruit trees

Pistachio tree pruning is one of the basic and principled methods of pruning pistachio trees and pruning should not be reduced to cutting fallen and dry branches of the tree.

In the pistachio tree, buds form on the leaves and twigs, and gradually the lower parts of the twigs become bare and barren. For this reason, it is necessary to prune and uproot the pistachio tree.

In fact, after a few years of fruiting, tall, fruitless branches grow, with pistachio clusters just near their tips.

Therefore, by pruning annuals in late winter, the number of lateral and secondary flowering branches can be increased in subsequent years. Thus, with proper distribution of clusters on the tree, both the productivity will be increased and the load capacity of the trees in different years will be balanced.

Importance of paying attention to the Off-year of pistachio trees

Off-year of pistachio trees can damage the country’s exports in one year with a shortage of products.

By providing a favorable position for other competitors at this time, some markets may be monopolized by competitors.

Off-year of pistachios

Gardeners are also harmed, and of course this year, if abandoned, could lead to further damage to trees and gardeners.

With proper and timed pruning and tree planting, a better and more suitable crop can be obtained, and with the management of the complication of pistachio tree annualization, the production rate can be more balanced and appropriate.

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