How to spray foliar fertilizer on jujube trees?

How to spray foliar fertilizer on jujube trees?

The growth of jujube tree branches and leaves is almost simultaneous with the development of flowers and fruits, which consumes a lot of nutrients and is concentrated, so reasonable foliar fertilizer spraying can quickly replenish certain nutrients.

The significance of foliar fertilizer application on jujube trees

The flowering of jujube trees is large and lasts for a long time, requiring a large amount of nutrients, and foliar fertilization is a suitable method for fast replenishment, and the general foliar spray fertilizer has a yield increase rate of 10%-20% for jujube trees.

Tests showed that foliar spraying of urea increased fruit set rate by 30%, potassium phosphate increased fruit set rate by 12.40%, boric acid increased (or borax) fruit set rate by 28.30%, potassium phosphate mixed with boric acid increased fruit set rate by 18%, urea mixed with boric acid increased fruit set rate by 16%, and multiple compound fertilizers increased fruit set rate by 14%.

Timing of foliar fertilizer spraying on jujube trees

Foliar fertilizer spraying on jujube trees should be carried out several times, and can be done during the physiological fruiting period of jujube trees, i.e. the final flowering period (about late June to early July) and the rapid fruiting period, i.e. the fruit expansion period (about July to August).

Fertilizer spraying interval 5-7 days, 3-5 times in a row, 5-10 kg per tree.

Concentration requirements for foliar fertilizer spraying on jujube trees

There are many fertilizers suitable for foliar spraying on jujube trees, with different concentrations: 0.3% to 0.5% for urea, 0.2% to 0.3% for potassium dihydrogen phosphate, 0.2% to 0.3% for boric acid, and 0.4% to 0.5% for multiple compound fertilizers.

The mixed fertilizer solution can be 0.3% urea + 0.2% potassium dihydrogen phosphate, 0.3% urea + 0.2% boric acid, 0.2% potassium dihydrogen phosphate + 0.2% boric acid.

The method of foliar fertilizer spraying on jujube trees

Date palm tree canopy tall, spraying should be used high-pressure sprayer, the upper part of the canopy can be used high-pressure direct-fire spray gun, in order to uniform spray cloth throughout the tree. The nutrients of spray fertilizer are mainly absorbed and utilized through the back of the leaves, so pay attention to more spraying of the back of the leaves to facilitate absorption and utilization.

Spray fertilizer should try to spray the back of the leaf, the front of the leaf has a layer of shiny cuticle, water is not easy to enter. The back of the leaf without cuticle, and there are many stomata, fertilizer easy to penetrate the absorption.

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