A Comprehensive Guide to Grape Fertilization Throughout the Year
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A Comprehensive Guide to Grape Fertilization Throughout the Year
In order to make grapes grow better, we need to fertilize them regularly. Below, I have compiled a comprehensive guide to grape fertilization throughout the year for you. Let's take a look together.
A Comprehensive Guide to Grape Fertilization Throughout the Year
Fertilization period - purposeGermination promoting fertilizer - Before grape germination, combine deep tillage of the ridge surface, and apply soil top dressing around it to promote uniform germination of buds. This time, nitrogenous fertilizers are mainly used to promote uniform germination, thick leaves, and large inflorescences. If the tree vigor is too strong and it is not very dry in spring, this fertilizer and water can be omitted to avoid causing excessive growth of new shoots.
Flowering fertilizer - Grapes require a lot of nutrients for germination and flowering. However, in early spring, the absorption roots are few and the absorption capacity is poor, so the stored nutrients in the tree body are mainly consumed. If nitrogen fertilizer (G-Y) is insufficient at this time, it can lead to a large number of flowers and fruit falling, affecting the nutritional growth!
Swelling fruit fertilizer - This top dressing can ensure the yield for the year and lay a good foundation for the following year's results, also having a good effect on overcoming alternate bearing. This top dressing is mainly nitrogenous fertilizer, supplemented with phosphorus and potassium fertilizers. High-nitrogen compound fertilizers can be applied, as well as ordinary three-element compound fertilizers, and urea and other nitrogen fertilizers can be added as appropriate. The amount of this fertilizer should be large, accounting for about 50% of the annual amount of chemical fertilizers applied.
Ripening promoting fertilizer - This top dressing is divided into two key periods. 20-30 days before maturity, apply high-potassium water-soluble fertilizers, and apply another round of fertilization when the grape berries start to soften but have not yet colored. This fertilization is very important! Many fruit farmers stop applying ripening fertilizers after applying swelling fertilizers, which can cause fruit discoloration (commonly known as "water jar disease") or poor resistance due to nutrient deficiency, leading to diseases, abundant yields without harvests, poor coloring, low sugar content, and unable to sell at good prices, etc. Functional fertilizers or large-element water-soluble fertilizers can be directly applied for coloring (recommended high-phosphorus high-potassium type, containing trace elements boron and zinc).
Important Considerations for Grape Fertilization
Hazards of excessive potassium application
During the growth of grapes, especially during the coloring period, growers apply a large amount of potassium fertilizer. Excessive potassium absorption can lead to premature aging of the nutrient branches, affecting the expansion of grape fruits. Excessive potassium can hinder the absorption of magnesium, affecting the photosynthesis of grape leaves, resulting in poor coloring or late maturity. It also has an adverse effect on the overall development of the grape plant.
Adverse effects of applying unripe organic fertilizers
Growers using unripe organic fertilizers contain a large number of pathogens and eggs. Chicken manure contains a high salt content, especially pig manure, which has the highest heavy metal content, which is harmful to the growth of grapes. The benzoic acid and ferulic acid produced by straw decomposition can also damage the root growth of grapes. Therefore, when using grapes as a base fertilizer, mature organic fertilizers must be used. Pig manure can be used, but it should not be used year after year.
Adverse effects of excessive fertilization
Currently, most high-efficiency irrigation and fertilization methods used by growers contain trace elements, some of which indicate the content, while others are only marked with capital letters "te." Ordinary growers cannot control whether trace elements are harmful to grape growth. Copper, manganese, boron, and zinc are the most important trace elements in the process of irrigation and fertilization.
The above is the complete content of the comprehensive guide to grape fertilization throughout the year, for your comprehensive understanding and reference!