1. Pomegranate root top dressing The root top dressing is also called foliar spraying. The foliar spraying mainly enters the leaves through the stomata and cuticles on the leaves, and then is transported to various organs in the tree. On one leaf, the leaf back absorbs faster than the leaf surface; within 1 day, it is better to be before 10 am and after 4 pm.
1. Urea is sprayed in late June and mid-September, and the spraying concentration is 0.3%~0.5%, which can increase fruit setting rate, promote growth, enlarge fruit and restore tree vigor.
2. Potassium dihydrogen phosphate is sprayed 3 to 5 times from early May to late September, with a spray concentration of 0.1% to 0.3%, which can promote flower bud differentiation, fruit enlargement, improve fruit quality, and enhance cold resistance.
3. Potassium sulfate is sprayed 3 to 5 times from early May to late September, with a spray concentration of 0.3% to 0.5%, which can promote flower bud differentiation, fruit enlargement, improve fruit quality, and enhance cold resistance.
4. The zinc sulfate plant is sprayed during the growing period, the spray concentration is 0.3%~0.5%, mainly to prevent zinc deficiency.
5. Spray when the leaves of the ferrous sulfate plants turn yellow. The spray concentration is 0.3%~0.5% to prevent iron deficiency.
6. Calcium superphosphate is sprayed 3 to 5 times from early May to late September, and the spray concentration is 1% to 3%, which can promote flower bud differentiation and improve fruit quality.
7. The plant ash is sprayed 3 to 5 times from early May to late September, and the spraying concentration is 2% to 3%, which can promote flower bud differentiation and improve fruit quality.
8. Spraying boric acid pomegranate at flowering stage, the concentration of spraying is 0.3%, which can improve the fruit setting rate.
2. When fertilizing the soil of the pomegranate tree, the fertilizer should be applied to the deeper part of the densely distributed area of ​​the root system, which can induce the roots to grow deeper. The general depth is between 30 cm and 80 cm. Organic fertilizers can be applied deep, and inorganic fertilizers can be applied shallowly.
1. Ring fertilization method The distribution range of young tree root system is small, this method is mostly used. This method is simple and economical. The disadvantage is that the ring-shaped ditch has a greater damage to the horizontal roots and a smaller fertilizing area.
2. Radiation ditch fertilization method This method is mostly used for trees in fruit growing period. This method excavates along the direction of horizontal root growth when digging a ditch, and there is less damage to the root, and the fertilization site can be replaced every other year or every other time to expand the fertilization area and promote root absorption.
3. The ditch fertilization method ditches between rows of pomegranate trees. Depending on the specific situation when ditching, fertilize deeply in each row or every other row. This method is mostly used for the deep turn of the kindergarten and the fertilization of the wide-row dense planting garden in autumn.
4. The hole-like fertilization method digs out hole-like pits uniformly to fertilize under the vertical projection of the canopy, and is mostly used during the top-dressing period in the adult garden.
5. Use this method when the whole garden is spread and the fruit growing season is closed and the roots are densely covered in the whole garden. This method fertilizes a large area and the pomegranate tree absorbs a large area, but it cannot be used year after year. Instead, it should be combined with deep fertilization and used alternately.
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