Fruit tree bottom fertilizer "Autumn Shi is gold"

The nutrients consumed by the fruit trees from the early spring germination to the flowering and fruit setting are mainly the nutrients stored in the tree in the previous year. The period from the harvest of the fruit to the time before the fall is the best time to accumulate nutrients. The autumn base fertilizer can increase the nutrient reserve of the tree.

In winter and spring, the temperature is low, and the organic fertilizer is decomposed slowly. During this time, organic fertilizer is applied and the fertilizer cannot be fully utilized. Autumn is in the period of nutrient accumulation of fruit trees, the aboveground part basically stops growing, and the photosynthesis of leaf surface is still strong, which is conducive to accumulating more nutrients to the stems and branches.

Autumn is the last growth peak of the root system in a year. Its life activity is strong, its ability to absorb nutrients is strong, and it is beneficial to delay leaf senescence, enhance the photosynthesis ability of autumn leaves, and increase the nutrient storage of trees.

Autumn is the strong period of root growth of fruit trees. At this time, the damaged roots caused by fertilization can heal quickly, and can quickly promote new roots, increase the number of roots absorbed, and expand the absorption area of ​​nutrients, thus greatly improving the fertilizer. Utilization rate.

Autumn Shiji Fei

In the fertilization period, in general, the fertilization period should be sooner or later than after the fruit trees are harvested until the autumn leaves. Wangshu and Xuwang trees can be postponed appropriately, and weak trees or old trees should be properly advanced.

The type of base fertilizer applied is usually based on delayed organic fertilizers, such as humic acid, compost, manure, compound fertilizer, etc., supplemented by quick-acting fertilizer and medium-micro fertilizer, combined with biological fertilizer, to achieve late-effect fertilizer and The quick-acting fertilizers complement each other. Nitrogen, phosphorus and potassium fertilizers should be combined with each other in chemical fertilizers, but it is not suitable to apply too much quick-acting nitrogen fertilizer to prevent the branches from growing up and triggering winter shoots, which is not conducive to the accumulation of nutrients in fruit trees and the improvement of flower bud quality.

Fertilization method: Circular groove fertilization method: In the outer edge of the vertical projection of the canopy, dig an annular groove with a width of 50 cm each, mix the fertilizer and soil evenly into the ditch, and cover the soil in time to seal the ditch. This method is mostly used for young tree.

Radial ditch fertilization method: starting from the trunk, starting from 1 meter from the tree, digging 4~8 fertilization ditch outwards, reaching 50 cm inside and outside the canopy, the depth of the ditch is 15 cm near the trunk, and gradually deepens outward. Up to 50 cm, this method applies to adult fruit trees.

Ditch fertilization method: Dig the width of each of the opposite sides of the canopy at a distance of about 50 cm. The length of the ditch depends on the size of the canopy. The fertilization should be rotated year by year. This method is often used in dense orchards.

Pay attention to these points

When applying farmyard manure, it must be decomposed. The fertilization order is first applied with organic fertilizer, biological bacterial fertilizer and compound fertilizer. Water and fertilizer are not separated, and water and fertilizer combination can help improve fertilizer efficiency.

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