What fertilizer is good for pomegranate trees?

Pomegranate is called beauty fruit, which has anti-aging function and has a great market in China. Fertilization is an essential work in pomegranate planting. Pomegranate is a fertilizer-loving crop, so how to fertilize pomegranate planting? What fertilizer is good for fertilization? Today we will talk about pomegranate fertilization.

Effects of nutrients on pomegranate growth

Nitrogen deficiency: the plant grows poorly, and the whole plant turns yellow from the lower leaves. Phosphorus deficiency: purplish red pigment appears between veins of mature leaves. Potassium deficiency: Black-brown gangrene spots appeared on the leaf margin of the middle leaf, which gradually spread to the veins. Calcium deficiency: the new leaves at the top are distorted, the mesophyll is brown and dry, and the growth is inhibited. Magnesium deficiency: yellow veins, severe gangrene spots between veins. Iron deficiency: the new leaves are yellow and white, but the lower leaves are normal. Boron deficiency: the growing point stops growing, the new leaves have irregular brown gangrene spots, and the plants are dwarfed. Copper deficiency: the new leaves near the terminal buds turn brown and twisted. From the effects of various nutrients on pomegranate, it can be seen that when fertilizing pomegranate, not only a large number of elements should be supplemented, but also pomegranate needs more medium and trace elements, so medium and trace elements can not be ignored. Next, let's talk about fertilization of pomegranate.

Fertilization technology of pomegranate

First, pomegranate is applied with base fertilizer.

Base fertilizer is the most important part in fruit tree cultivation, and pomegranate is no exception. Whether the basal fertilizer is applied well or not is the key to the healthy growth, high fruit setting rate and high quality of pomegranate. Pomegranate base fertilizer is applied in three times, namely spring base fertilizer, summer base fertilizer and autumn base fertilizer.

1, spring fertilization: the fertilization time of pomegranate in spring is before germination and after flowering. Spring is the main growth and development period of pomegranate new organs, so nitrogen fertilizer is the main fertilizer requirement. At the initial stage of growth, it mainly consumes the nutrients stored in the previous year. In order to ensure that pomegranate trees can continuously absorb nutrients, fertilization should be carried out early in spring, and fertilization is the best in bud.

Available nitrogen fertilizer is the main type of fertilizer. Generally, 3 kg urea or 10 kg ammonium bicarbonate is applied to adult trees.

2. Summer base fertilizer: The fertilization time of summer base fertilizer is generally better in May. At this time, the leaves basically stopped growing, but the growth of fruits and roots continued.

Organic fertilizer is the main fertilizer. At this time, fertilization will not cause the secondary growth of pomegranate and affect the accumulation of nutrients in fruit, which is beneficial to the absorption of roots.

3. Fertilization in autumn: Generally, pomegranate is fertilized immediately after fruit picking 10~ 15 days. It is the second growth peak of pomegranate root system, and the injured root is easy to heal itself. Even if the root system is accidentally cut off during fertilization, it can not only prune the root system, but also promote the generation of new roots.

In autumn, organic fertilizer is the main fertilizer, accounting for about 80% of the annual fertilization, and 5~ 10 kg of organic fertilizer is applied to each adult tree.

Second, topdressing pomegranate.

Topdressing of pomegranate is divided into topdressing before flowering, topdressing after flowering and topdressing during fruit expansion, and then explained separately.

Topdressing before flowering: Topdressing before flowering is generally applied before flowering in early May, with available nitrogen, phosphorus and potassium as the main fertilizers, and topdressing in time to meet the needs of pomegranate flowering and fruit setting. According to statistics, topdressing pomegranate before flowering can increase the fruit setting rate by about 65438 0.5 times. Top dressing after flowering: Top dressing is carried out at the fruit-setting stage after flowering, when young fruits grow rapidly, and top dressing can reduce physiological fruit drop. Nitrogen fertilizer can promote shoot growth and enhance photosynthesis. If you fertilize too much before flowering, you can't fertilize after flowering. Top dressing in expansion stage: The fruit expansion stage is the peak of pomegranate fertilizer demand, when the new shoots basically stop growing and the flower buds begin to differentiate. Topdressing at the swelling stage can promote pomegranate fruit swelling and nutrient accumulation. The fertilizer is mainly compound fertilizer or special fertilizer for fruit trees. Generally, the fruit yield of adult plants is about 50 kg, and 2-3 kg of special fertilizer for fruit trees and 0.5- 1 kg of urea are applied to each plant. During this period, it is necessary to spray the leaves with the mixed solution of potassium dihydrogen phosphate and urea for 2~3 times to ensure the accumulation of nutrients in the tree and the coloring of pomegranate fruit in the later stage.

Three. Supplement of Trace Elements in Pomegranate Tree

When planting pomegranate trees, we should pay attention to the supplement of trace elements, especially adult trees, which are seriously short of boron and zinc. Trace elements applied to roots can be combined with other fertilizers in spring.

Supplementing zinc nutrition: About 2-3 weeks before flowering, cooperate with plants to fertilize or spray 1~2 times, and apply 0. 1㎏ zinc sulfate. Boron nutrition supplement: boric acid can be sprayed on the leaves 2~3 times before and after flowering, or about 20 grams of borax can be applied in conjunction with fertilizing plants. The above is the fertilization management of pomegranate and the fertilizer suggestions used in fertilization. The soil and climate conditions in different planting areas are different, and the fertilization methods should also be changed. Only reasonable fertilization according to the actual situation can achieve the effect of high quality and high yield.