Apple tree "monthly child fat" to make up
The best area for autumn basal fertilization is because the absorption root of fruit trees is more than 90% distributed at the end of the root system. Therefore, the area of ​​autumn basal fertilization should be: the saplings are applied on the projected edge of the crown of fruit trees, and the roots are introduced year by year through fertilization. In addition, the roots and crowns are simultaneously expanded. Big trees should be at the inner edge of the canopy projections and at the most hairy roots. This is the fertilization area in successive farms throughout the year. The whole garden fertilization should be 60 cm away from the trunk. In terms of depth, over-fertilization can easily cause roots to float, which is not conducive to drought resistance and cold resistance of fruit trees. Roots within 5 to 35 centimeters from the surface of the ground account for 80% of the total root volume, and the depth of fertilization should be 20 to 40 centimeters. It is particularly advisable to pay attention to the supply of shallow root nutrients below 20 cm. The depth of application of fertilizer is not as deep as possible. Under normal fertility conditions, surface soil has a large amplitude due to temperature and moisture, which is not conducive to root growth, and the utilization rate of fertilizer is low. The root distribution of fruit trees in soil layers below 50 cm is very small, the soil environment is poor, and the fertilizer utilization rate is also very low. Therefore, the base fertilizer in autumn should not be too deep.
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Method of autumn basal fertilization 1 Ring groove application. Dug around the canopy at the periphery of the canopy and fertilize it. The amount of wounded roots is less, and attention is paid to changing the position year by year. This method is mainly used in young orchards. 2 radial groove application. 1 meter away from the trunk, dig 5 to 8 radiation channels, from the inside to the outside, from shallow to deep, dig a radial groove with a width of 20 to 30 centimeters and a depth of 15 to 30 centimeters, and fertilize it, pay attention to replacing the position year by year. This method is suitable for sparse trees. 3 strip groove application. Fertilize in rows between rows, the width of the ditch is 30 cm, and the depth is 25-30 cm. After the fertilization, the ditch is filled and watered. 4 The whole garden is applied. This method is suitable for mature orchards. It is necessary to spread the fertilizer evenly, combined with autumn ploughing and deep turning, and turn the fertilizer into the ground. However, it should be noted that urea or potassium chloride per tree does not exceed 0.075 kg, or 0.2 for each compound. Kilograms, especially near the trees, should not be too much fertilizer. Http://Content/baa59219-8a8e-451c-a859-471b835f18d4?cType=2