Buying fertilizers Fertilizers are generally based on organic fertilizers, such as barn manure, soil miscellaneous fertilizers, cake fertilizers, plant ash, etc., and appropriate quick-acting nitrogen fertilizers, phosphate fertilizers, and potash fertilizers are used to enhance tree vigor. Organic fertilizers must be fully decomposed and applied. Do not directly apply raw manure or chicken manure. If the organic fertilizer is applied to the rhizosphere of jujube trees without being decomposed, the heat generated during the decomposition of soil microorganisms will burn the root system, causing the tree to weaken, die or induce rot disease. The amount of organic fertilizer applied should account for more than 90% of the amount of fertilizer applied.
Appropriate top dressing. The amount of fertilizer applied in autumn in the jujube garden should be determined according to the size of the jujube tree, the nutritional status, and the number of fruits. Generally, 30-50 kg of organic fertilizer, 1 to 1.5 kg of superphosphate, and 0.5 kg of urea are appropriate.
The application technique is combined with the cultivation of the jujube garden, and the whole garden can be used for spreading, radial furrow or circular furrow application. The entire park was removed. Remove the fertilizer evenly in the garden, combine with turning the ground into the middle, and the appropriate depth of tillage is 20-25 cm. However, the shallow application depth of this method is easy to cause the root system to float, and it is suitable for fertilization in adult orchards and densely planted orchards. Radiation ditch application. This method has less root damage and is suitable for adult fruit trees. With the trunk as the center, dig 4-6 trenches along the horizontal root extension direction, 1 to 1.5 meters away from the trunk. The depth of the ditch gradually deepens from the inside to the outside, generally 30 to 50 cm, narrow inside and wide outside. Cover tightly after application. According to experiments, deep application of basal fertilizer is better than shallow application without cutting the roots of jujube trees. Circular furrow application. This method is mostly used for young trees, the location of the ring groove is on the outer edge of the canopy projection, and the groove depth is 30-50 cm. It moves out every year as the canopy expands.
After watering and fertilizing the jujube garden in autumn, it should be watered 1-2 times. This method can ensure sufficient water, which can make the fertilizer quickly rot and ferment and decompose, and can prevent the jujube tree from drought in autumn. After watering, the soil should be loosened to preserve moisture when the surface is half dry. Use crop straws, thatch and other materials to cover the moisture preservation, the effect is better.
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