How to apply fertilizer outside the pomegranate tree in summer

The top dressing is foliar fertilizer, and the appropriate amount of fertilizer liquid is evenly sprayed on the pomegranate leaves. The first is to increase the nutrition of the tree, increase the yield and improve the fruit quality. Generally, the fruit weight is increased by 1.5% to 3.5%, and the yield is increased by 5% to 10%. The second is to supplement the demand for trace elements in a timely manner. The advantages of foliar fertilization are rapid absorption, rapid response, and obvious effect. Generally, they can be absorbed from 15 minutes to 2 hours after spraying, and the leaves respond to fertilizer elements in 10 to 15 days, which can prevent many trace elements from being easily soiled after being applied to soil. The disadvantages of fixing and reducing fertilizer efficiency.

After 25-30 days of foliar spraying, the response of the leaves to fertilizer elements gradually disappears, so it can only be a supplement to the soil fertilization. The large amount of nutrients required for the growth of the pomegranate tree still depends on soil fertilization. The optimum temperature for foliar fertilization is 18°C～25°C, so the spraying time is best before 10 o'clock in the morning and after 4 o'clock in the afternoon. Atomization is better when spraying, uniform spray, and special attention should be paid to increasing the amount of fertilizer on the back of the leaf.

Fertilizers that are generally soluble in water can be used for top dressing, and different types of fertilizers are used depending on the purpose of fertilization. Foliar fertilizer can be combined with pesticides to prevent pests and diseases together. However, when spraying is mixed, care must be taken not to reduce efficacy and fertilizer efficiency. Such as alkaline pesticide lime sulfur, Bordeaux mixture can not be mixed with superphosphate, manganese, iron, zinc, molybdenum, etc.; and urea can be mixed with Bordeaux mixture, dichlorvos, phoxim and other pesticides.

The concentration of foliar spray should be accurate to prevent damage caused by medicine and fertilizer. Spraying can also add a small amount of wetting agent, such as soap, detergent powder, saponin oil, etc., can make fertilizer and pesticides adhere to the foliage, improve the effect of suction fertilizer and pest control.

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