What is the best fertilizer for grape top-dressing
A small tip for life, introducing the small knowledge of flower cultivation on what is the best fertilizer for grape top-dressing, the specific details are as follows:
What is the best fertilizer for grape top-dressing
Grapes can be top-dressed with a bud-promoting fertilizer in early spring, in February, mainly nitrogen fertilizer. The pre-flowering fertilizer is applied at the end of April, and nitrogen and phosphorus fertilizers can be applied while watering. During the fruit enlargement period, the demand for fertilizer is high, mainly nitrogen and potassium fertilizers. To better color and improve fruit quality, appropriate top-dressing with potassium and magnesium fertilizers is also needed. After the grapes are harvested, a ternary compound fertilizer can be used.
Grape top-dressing time
Before the grapes sprout, a nitrogen fertilizer can be applied, such as decomposed human manure, urea, ammonium bicarbonate, ammonium sulfate, etc. The second top-dressing is done after fruit setting, applying human manure or a compound fertilizer of nitrogen, phosphorus, and potassium or urea. The third top-dressing is done when the fruit begins to color, mainly potassium fertilizer, combined with an appropriate amount of phosphorus fertilizer to improve fruit quality. After harvesting, apply phosphorus-potassium fertilizer.
What fertilizer to use for grape top-dressing
After the grapes sprout, a ternary compound fertilizer of nitrogen, phosphorus, and potassium can be applied. After the flowers fall and the young fruits enlarge, a fruit enlargement fertilizer, i.e., urea, phosphorus fertilizer, and potassium fertilizer, can be applied. Before the fruits are mature and harvested, apply potassium sulfate and diammonium phosphate.
Should urea or compound fertilizer be used for grape top-dressing
Grape top-dressing can consider using compound fertilizers, which contain more nutrients, and many compound fertilizers have a longer-lasting effect than urea, which is very helpful for grapes. For plants that grow vigorously, urea can be used for top-dressing, with a more noticeable effect. From a cost perspective, urea is more economical.
Methods for grape top-dressing
The principle of grape top-dressing is to use a combination of organic and inorganic fertilizers to meet the various needs of the plant, and to rationally proportion nitrogen, phosphorus, and potassium fertilizers. The fertilization methods are generally divided into three types: base fertilizer, root top-dressing, and foliar top-dressing.
Grape trees need to be top-dressed with bud-promoting fertilizer, pre-flowering fertilizer, fruit-enlarging fertilizer, coloring fertilizer, and post-harvest top-dressing. The stage of growth differs, and so does the amount of fertilizer needed.
Grape trees can be top-dressed with a bud-promoting fertilizer in early spring, in February, mainly nitrogen fertilizer. The pre-flowering fertilizer is applied at the end of April, and nitrogen and phosphorus fertilizers can be applied while watering. During the fruit enlargement period, the demand for fertilizer is high, mainly nitrogen and potassium fertilizers. To better color and improve fruit quality, appropriate top-dressing with potassium and magnesium fertilizers is also needed. After harvesting, a ternary compound fertilizer can be used.
Precautions for grape top-dressing
When fertilizing grapes, note that the base fertilizer should not be applied too shallowly, as it may cause seedling death. Also, fertilize appropriately during germination to avoid leaf yellowing. Moreover, not more fertilizer is better; fertilization should be rational. Finally, do not apply fertilizer too close to the trunk, and be sure to water after fertilizing.
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