Techniques for Fertilizing Grapes at Different Stages
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Techniques for Fertilizing Grapes at Different Stages
Farmers who grow grapes know that to sell well, one must master the changes in the sweetness and color of grapes. The most important is fertilization. Grape growth is divided into germination stage, flowering stage, young fruit stage, expansion stage, coloring maturity stage, and overwintering stage. If fertilized properly during these stages, it can effectively improve the yield and quality of grapes. So what are the fertilization techniques and precautions at different stages of grape growth?
Germination Stage
Generally, fertilize once before germination to promote the growth of new shoots and the germination of branches. Nitrogen fertilizer is the main fertilizer for seed germination stage, which can effectively promote the rapid growth of new shoots and leaves.
Flowering Stage
During the flowering stage, phosphorus fertilizer is the main fertilizer (phosphorus mainly promotes flower bud differentiation), and quick-acting fertilizer should be applied before flowering. If quick-acting fertilizer is selected, it can be applied 3-5 days in advance, and compound fertilizer can be applied 15-20 days in advance.
Young Fruit Stage
To promote the rapid expansion of young fruits and prevent the occurrence of various potassium deficiency symptoms, potassium fertilizer should be the main fertilizer. Potassium can promote the maturity of young grapes, increase the sugar content of the fruit, reduce acidity, and improve the taste and color of grapes.
Expansion Stage
The demand for potassium in the expansion stage of grapes is greater than that in the young fruit stage, which is the highest fertilizer requirement in a year for grapes. Sufficient potassium fertilizer can effectively improve the expansion speed of grape fruit, promote fruit coloring, increase sweetness, and prevent falling off.
Coloring Maturity
If the coloring is not good at this time, potassium fertilizer can be applied again. If the root fertilizer is sufficient, some potassium fertilizer products can be applied appropriately to promote coloring and increase sugar content.
After Harvesting
After harvesting, to quickly recover from damage, safely overwinter, and not affect the next year's products, some nitrogen fertilizer (to promote recovery from damage) and phosphorus fertilizer (to promote root development) can be applied. The earlier the better.
Precautions
When planting grapes, usually after germination, it is possible to supplement irrigation fertilization or water-soluble fertilizers in a timely manner. It is necessary to ensure the nutrients needed for grape growth, promote seedling raising, and promote the expansion of young fruits.
The above are the fertilization techniques and precautions for grapes at different stages. When fertilizing, attention should be paid to scientific fertilization and timely application of some trace elements. It is hoped that the above fertilization techniques and precautions can be helpful to farmers.
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