Fertilization period
The base fertilizer is better for autumn, and the early autumn is better than the late autumn or early winter. It is generally applied to the base fertilizer after harvesting from the mid-ripening variety to the leaves. At this time, the ground temperature is high, which is conducive to the healing of roots and the new roots, and is also conducive to the decomposition and absorption of organic fertilizer. If it is not applied in autumn, it can also be applied in early spring.
Fertilization type
The base fertilizer is mainly composed of delayed organic fertilizer, including humic acid fertilizer, compost, manure, circle fertilizer, crop straw, cake fertilizer and human waste. Generally, when applying the base fertilizer, a certain amount of quick-acting chemical fertilizer, including nitrogen, phosphorus, potassium single fertilizer and multi-component fertilizer, is applied.
Fertilization amount
The base fertilizer is generally based on organic fertilizer. The application amount of organic fertilizer (converted according to high-quality circle fertilizer), the tree in the sapling stage is applied 1000-2000 kg per mu, and the tree in the initial fruiting period is applied 2000-3000 kg per acre, and the tree in the fruit-bearing period masters the "pound fruit" Or the principle of “pounding fruit and half fatâ€, generally 3000-5000 kg per mu. In the base fertilizer, the amount of fertilizer applied should be determined according to the amount of organic fertilizer. In general, if the organic fertilizer is sufficient, one-third of the annual fertilizer application can be used as the base fertilizer; if the amount of organic fertilizer is insufficient, 2/3 of the annual fertilizer application should be applied as the base fertilizer.
Fertilization method
The annular groove fertilization excavates an annular groove with a width of 40 cm and a depth of 30-50 cm on the outer edge of the canopy projection. The fertilizer is mixed with a small amount of soil or a layer of soil and a layer of soil is applied, and then the soil is filled and the water is sealed.
The radiation ditch is applied to dig 4-6 strips of 20-40 cm deep from the trunk. The ditch length should exceed the outer edge of the canopy projection. The inside and the outside are shallow and deep. After the fertilizer is applied, the soil is filled and the water is sealed.
The furrow fertilization applied fertilizer to the outer edge of the canopy projection of the row to dig a groove of 40 cm wide and 30-50 cm deep. According to the amount of fertilizer and labor, the side or side trenches are dug every year and rotated every other year.
The roots of the whole garden have been covered with densely planted gardens or large trees in the fruiting period. The fertilizer can be evenly spread throughout the garden, and then turned over 20 cm to mix the fertilizer with the soil.
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