Grape growth period and fertilizer requirements (fertilization management methods and techniques during grape growth period)

1. Base fertilization

Base fertilization is generally carried out after picking in autumn. It is recommended to do it after the fruit is set. The time for fertilization should not be too late, as it is not conducive to the differentiation and nutrient reserve of grape flower buds. This time, fertilization is mainly carried out in deep trenches.

Many manufacturers promote the so-called "confinement fertilizer", which is to use water-soluble fertilizer to supplement nutrients. This method is fast, but it still cannot replace basal fertilization.

Base fertilizer is mainly organic fertilizer, compound fertilizer, and medium and trace element fertilizer. Fertilizer can be applied according to the actual situation of the garden. If calcium and magnesium are insufficient, calcium magnesium phosphate fertilizer can be added to the orchard. Some people ask whether chicken manure can be used. Decomposed chicken manure, cow manure, etc. are all OK.

2. Fertilization during bud and flowering period

This time, high-nitrogen compound fertilizer is generally used for fertilization. For poor germination or poor tree vigor, it is recommended to add Sea Elf biostimulant.

For vigorous grape trees or those with fewer fruits, it is not recommended to apply fertilizer at this time. Spraying with excellent fertilizers such as Boron Source Library once before flowering will be beneficial to flowering.

Fertilization during the flowering period is also aimed at weak trees. Generally, nitrogen fertilizer is the main fertilizer, which can generally supplement the nutrient consumption during the flowering period. Some people also use nitrogen fertilizers such as urea to promote flowering, which requires certain experience. It is not applied to vigorous trees.

3. Fertilizer for expansion period

It is applied when grapes and soybeans mainly to promote rapid expansion of the fruit and supplement the fertilizer needed for fruit expansion, generally high-nitrogen compound fertilizer or water-soluble fertilizer.

You can apply fertilizer in shallow furrows, or add Sea Elf to improve tree vigor, and appropriately supplement the leaves with calcium and magnesium fertilizers such as Gaishimei to ensure the health of the fruit.

4. Fertilizer during color change

The main purpose is to promote the color change and sweetening of the fruit. High-potassium compound fertilizer can be used for shallow furrow application, and red foliar fertilizer can be sprayed on the leaves to promote color change and sweetening, thereby increasing the commercial value of grapes.

5. Post-harvest fertilizer

Some people define this fertilizer as "confinement fertilizer". Its main significance is to promote the recovery of tree vigor and the differentiation of flower buds. Especially in orchards where base fertilizer is applied late, the application of post-harvest fertilizer is beneficial to preserve leaves and restore tree vigor.

Generally, high-nitrogen water-soluble fertilizer can be applied. If the fruiting amount is large, sea elves can be applied. There are also many growers who directly apply base fertilizer and no longer apply this "confinement fertilizer".