What Fertilizer Should Grapes Be Applied to Bloom and Bear More Fruit
Today's introduction to the green plant flowers aspect of what fertilizer should be applied to grapes to bloom and bear more fruit, with specific details as follows:
What Fertilizer Should Grapes Be Applied to Bloom and Bear More Fruit
To ensure that grapevines are full of fruit, many factors are involved, but fertilization is definitely one of the important aspects. During the germination, leaf expansion, flowering, and first fruit expansion stages of grapes, the demand for nitrogen fertilizer is higher; during the vigorous growth of new shoots and berry expansion stages, the demand for phosphorus is higher; and during the fruit coloring and maturation stages, the demand for potassium is higher.
To ensure that grapevines are full of fruit, many factors are involved, but fertilization is definitely one of the important aspects.
During the germination, leaf expansion, flowering, and first fruit expansion stages of grapes, the demand for nitrogen fertilizer is higher; during the vigorous growth of new shoots and berry expansion stages, the demand for phosphorus is higher; and during the fruit coloring and maturation stages, the demand for potassium is higher.
Therefore, fertilization should be targeted according to the different growth stages of grapes. Based on the purpose and time of fertilization, grape fertilization can be divided into two forms: base fertilizer and topdressing.
What Kind of Base Fertilizer Should Grapes Be Applied for Better Growth
Base fertilizer includes planting trench base fertilizer and autumn base fertilizer, and their purposes are different. The purpose of applying base fertilizer in the planting trench is to improve the orchard soil environment and increase the organic matter in the soil.
The purpose of applying autumn base fertilizer is to increase the accumulation of tree nutrition and promote the growth of grape roots. The following is a detailed introduction to how to apply autumn base fertilizer.
① Types of Base Fertilizer
Base fertilizer should mainly consist of farm manure or commercial organic fertilizer, supplemented by chemical fertilizers such as superphosphate, sulfate potassium, and trace element fertilizers.
② Timing for Applying Autumn Base Fertilizer
Theoretically, base fertilizer can be applied from after grape harvest to before the soil is frozen, but according to production experience, applying base fertilizer immediately after harvest yields the best results.
③ Methods for Applying Base Fertilizer
The methods for applying base fertilizer vary in different grape-growing areas, but mainly involve trenching or hole digging, usually once every 1-2 years. The specific practice is to dig trenches or holes about 40 centimeters on both sides of the grape plants every other year, with a depth of 50-60 centimeters, then apply the fertilizer and promptly cover it.
④ Amount of Base Fertilizer
It is generally recommended that for an orchard producing 1000 kilograms of grapes per mu, an amount of about 4000 kilograms of base fertilizer can meet the basic production needs of grapes.
⑤ Precautions When Applying Base Fertilizer
The organic matter in the base fertilizer should be fully decomposed and fermented, and it should be mixed evenly with the soil during application. The two base fertilizers should be applied in different locations.
When digging fertilizer trenches or holes, avoid damaging the thicker roots.
After applying the fertilizer, water thoroughly.
In areas where it is necessary to bury the soil for winter protection, base fertilizer can generally be applied in the spring instead of in the autumn.
Annual Topdressing Fertilization Schedule for Grapes
Applying base fertilizer can basically meet the nutrient needs of grapes throughout the year (G-Y). However, it is still necessary to adjust the nutrient supply according to the different growth stages and nutrient demands of grapes, using fast-acting fertilizers for topdressing, which can be divided into root topdressing and foliar topdressing.
1. Root Topdressing
Root topdressing can be applied based on the actual needs of grape growth, using single-element fertilizers or compound fertilizers.
Timing for Root Topdressing
Based on the fertilization needs of grapes at different stages, root topdressing is mainly divided into the following times:
Bud Break Fertilizer: Apply about 15 days before grape bud break, with nitrogen fertilizer as the main type.
Young Fruit Growth Stage Topdressing: After the grapes bloom and the young fruits begin to expand, apply a balanced fertilizer with nitrogen, phosphorus, and potassium.
Initial Fruit Coloring Stage Topdressing: According to the color of the variety, apply to red varieties when they start to color and to white varieties when the berries start to soften, with phosphorus and potassium fertilizers as the main types.
Methods for Root Topdressing
It is recommended to use drip irrigation for fertilization, which is more uniform and accurate; if not possible, it is best to use trenching or hole digging. The method of applying fertilizer with large amounts of water is the least effective.
Amount of Root Topdressing
The amount of fertilization varies depending on the region and soil fertility, which requires some accumulation of local planting experience.
Generally, for every 1000 kilograms of grapes produced, it is necessary to absorb 3-6 kilograms of nitrogen, 1.5-2.8 kilograms of phosphorus, and 3.6-6.8 kilograms of potassium.
Below is an example of a fertilization plan developed for a customer in Zhangye, Gansu Province. The vineyard has a row spacing of 3.5 meters and a plant spacing of 0.5 meters, with an annual yield of about 900 kilograms of grapes per mu. The fertilization plan is divided into three applications throughout the year.
First Application: Immediately after the soil thaws and the grapes are unearthed, apply 2000-4000 kilograms of base fertilizer per mu, with a nitrogen-phosphorus-potassium ratio of 20-15-10, and 40 kilograms of compound fertilizer.
Second Application: After flowering and fruit expansion, apply 30 kilograms of compound fertilizer per mu with a nitrogen-phosphorus-potassium ratio of 15-15-15.
Third Application: Start topdressing when the fruit starts to color, applying 30 kilograms of compound fertilizer per mu with a nitrogen-phosphorus-potassium ratio of 10-15-18.
Issues to Consider When Applying Topdressing
When applying topdressing, keep a distance of 30-50 centimeters from the grape plants, apply nitrogen fertilizer shallowly, and apply phosphorus and potassium fertilizers deeply. Water immediately after fertilization.
2. Foliar Topdressing for Grapes
Foliar topdressing can be said to have the effect of lifting a thousand pounds with a few ounces, being both economical and labor-saving while being quickly absorbed by grapes, with particularly noticeable effects in treating nutrient deficiencies.
Types of Fertilizers for Foliar Topdressing
The main chemical fertilizers suitable for foliar topdressing include urea, superphosphate, potassium dihydrogen phosphate, water-soluble compound fertilizers, and trace element fertilizers such as chelated calcium, sugar alcohol calcium, borax, zinc sulfate, and ferrous sulfate.
Timing for Foliar Topdressing
Generally, foliar fertilizers can be sprayed throughout the grape growing season, but it is best to follow the grape's nutrient needs and growth conditions.
This means that during the critical period when grapes need a particular element the most, spraying the most needed fertilizer yields the best results.
For example, nitrogen fertilizers can be sprayed from leaf expansion to before flowering; phosphorus fertilizers can be sprayed during fruit expansion; and potassium fertilizers can be sprayed during fruit coloring. Trace elements should be sprayed symptomatically when deficient.
Methods for Foliar Topdressing
Emphasize spraying on leaves and new shoots.
Number of Foliar Topdressing Applications
Nitrogen, phosphorus, and potassium can be sprayed 1-3 times during a growing season, individually or in combination.
Issues to Consider When Applying Foliar Topdressing
Foliar fertilizers should be prepared and used immediately; during spraying, ensure even coverage and sufficient spray applications. When mixing several foliar fertilizers, be sure to pay attention to the acidity and alkalinity of the fertilizers to avoid reducing efficacy or causing fertilizer damage, especially when using new types of foliar fertilizers, strictly follow the instructions for use.
It is important to note that while fertilization has a significant impact on grape yields, it is also necessary to pay attention to the management of factors such as soil, light, temperature, and water, as only when all aspects are adapted to grape growth can the vines achieve high yields and quality.
This article shares a comprehensive method for what fertilizer should be applied to grapes to bloom and bear more fruit, hoping it can serve as a starting point to solve your green plant problems.