One avoid application of ammonium nitrate. Nitrate nitrogen is readily absorbed during the growth of fruit trees. If ammonium nitrate is applied after the application of ammonium nitrate, excessive consumption of nitrate ions in the fruit trees may cause accumulation of poisoning. Second bogey water application of ammonium bicarbonate. Ammonium carbonate is extremely unstable and volatile. Therefore, in the application of ammonium bicarbonate in fruit trees, whether as a basal fertilizer or top dressing, should be applied in the case of wet orchard, immediately after application. If the soil is particularly dry, it may be better to apply ammonium bicarbonate after watering. Three avoid repeated application of ammonium sulfate. In orchards from acidic soils to slightly alkaline soils, if ammonium sulfate is used continuously, the acidity of the soil will increase, which will cause soil compaction and affect the root activity, which will lead to poor growth of fruit trees, leading to a serious decline in yield and quality. Four bogey urea after watering. The nitrogen contained in urea can only be absorbed and used by the roots of fruit trees after being transformed into ammonium carbonate under the action of soil microorganisms. If water is applied immediately after urea is applied, nitrogen can be easily lost. Therefore, whether urea is used as base fertilizer or as top dressing, it should be watered for 5-7 days after application to avoid loss. China Agricultural Network Editor
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