The need to use suitable pistachio fertilizers during the sleeping season

Fertilizing the pistachio tree is one of the important things to do in winter. Failure to use fertilizer causes the branches to become weak and thin, and in spring, which is the season of germination, the number of vegetative buds decreases and the yield decreases. Iranian Pistachio

Suitable fertilizers for pistachios in the winter season include three categories of chemical fertilizers, animal fertilizers and micronutrient fertilizers, which are very important to use correctly and in the right amount. Excessive use of fertilizer will cause excessive thickening of branches and damage to vegetative buds, and incorrect use of fertilizer can also reduce absorption. Therefore, in the following, we will discuss the correct method of using these fertilizers.

What is the best method of fertilizing in winter?

One of the most essential fertilizers that should be used are phosphorus fertilizers. Among the phosphorus fertilizers, simple super phosphate fertilizer is due to its low price, suitable and acidic pH, and the presence of calcium and sulfur in it. It is one of the best types of phosphorus fertilizers that can be used.

Considering that phosphorus fertilizers, unlike nitrogen and ammonium fertilizers, do not have much mobility; If they are poured on the ground and then irrigation is done, this phosphorus will not be absorbed by the roots. Therefore, one of the correct methods of using fertilizer for pistachios in this season is to dig holes in grooves around the tree and sprinkle phosphorus fertilizers on the bottom of the channel, that is, on the hairy roots.

So far, we have explained the normal and usual procedure of fertilizing pistachio gardens, but despite all these works, the tree may face a lack of nutrients for any reason, and in the pistachio tree, like other plants, the lack of various elements occurs with different symptoms, which are as follows. We will discuss this issue in detail.

What is the role of nitrogen in pistachios and the symptoms of its deficiency in pistachios?

Fertility of pistachio trees is highly dependent on nitrogen, and its deficiency limits the growth and production of pistachio crops. Also, since the main role of nitrogen in pistachios is the production of plant proteins, its deficiency has a detrimental effect on the quality of the product. Although the price of fertilizers like 20 20 20 is lower than some other fertilizers, its use will have a great effect, especially on pistachio trees.

Nitrogen deficiency in the pistachio tree with symptoms such as general growth reduction, narrowing of newly grown branches, reduction in the number of crops in the cluster, reduction in the number of leaves, fading of new leaves, yellowing of old leaves and formation of brown and red seeds. The color appears on the leaf.

Suitable fertilizers for pistachios

The importance and role of potassium in the pistachio tree

Potassium is very important for the growth of strong and healthy leaves. So that potassium deficiency shows itself in early to mid-summer with pale and yellow leaves, smaller old leaves with burnt margins and scattered foliage. Also, with a decrease in the potassium level, the yield (quantitatively and qualitatively) decreases.

After nitrogen, the most important element consumed by the pistachio tree is potassium. According to the estimates made; For every 1000 kg of harvest, 24 kg of fertilizer is absorbed by the trees.

Magnesium deficiency, which is more common in calcareous and heavy alkaline soils, shows itself by analyzing the leaves, which, of course, is difficult to diagnose and requires more special investigations. Boron deficiency is also severe early in the season and in some areas. It shows itself with yellow and untidy leaves.

Important micronutrients for the pistachio tree and their deficiency symptoms

Calcium; The most important micronutrient for pistachios

Calcium is very important in the growth and development of pistachio tree roots. If the amount of calcium in the soil is low, the root will not grow much. In pistachio trees with calcium deficiency, the young leaves near the end of the branch are wrinkled and the tips of the leaves and their margins are rolled up and down.

Calcium deficiency in pistachio trees usually happens due to lack of proper transfer in the plant. In fact, the main problem of calcium deficiency in pistachio is not its lack in the soil, but its transfer inside the plant.

Symptoms and effects of zinc deficiency

Zinc deficiency is more common in areas that have a history of using animal fertilizers. In the case of zinc deficiency in pistachio trees, the terminal leaves become small and yellow, the edges of the leaves are irregular and the yield is reduced.

Under what conditions did copper deficiency occur and what are its symptoms?

Copper deficiency, which occurs mostly in sensitive alkaline soils and mostly in young trees, manifests itself with symptoms such as burns on the edges and tips of leaves and falling leaves.