Detailed Explanation of Key Points of Grape Greenhouse Cultivation Techniques

Because grape growth has certain requirements for light, temperature, humidity, etc., and when growing grapes in the north, greenhouses are usually chosen for planting, so that grape production can be managed conveniently and the high yield of grapes can be improved. Although growing grapes in greenhouses has many benefits, it is still useless if the planting techniques are not up to standard. Below, let us learn about the key points of grape greenhouse cultivation techniques.

1. Choose suitable grape varieties

If you want to choose greenhouse cultivation for grapes, choosing suitable varieties is very important. First, choose those with good fruit quality; second, choose those whose maturity period is neither too early nor too late; and finally, choose varieties that are convenient for transportation and storage. Common grape varieties include Kyoho grapes (Vitis vinifera 'Kyoho'), and some hybrid varieties are also acceptable.

2. Planting methods

The planting method for greenhouse grapes should be decided according to your cultivation needs. If you choose early-maturing or mid-maturing grape varieties, they are more suitable for cultivation in heat-retaining greenhouses, followed by forced ripening methods. If you choose high-quality grape varieties, they are suitable for late-maturing planting methods and can be planted in plastic greenhouses, which can reduce the impact of humidity on grapes and also reduce the invasion of pests and diseases.

3. Choose a planting site

Greenhouse grapes are suitable for a dry location with sufficient sunlight, open terrain, and good air quality. Soil with good air permeability, strong drainage, and good fertilizer retention, such as sandy soil, is relatively good.

4. Film mulching work

First, choose suitable plastic film, focusing mainly on key points such as thickness and light transmittance, because these two points are very important for grape growth. If your location has long sunlight hours and relatively high temperatures, the aging of the greenhouse plastic film will be faster. If affected by windy weather, the film may suffer damage. The use time of greenhouse plastic film should preferably not exceed two years, as it easily affects light transmittance and heat retention. Therefore, if the film is to achieve the best application value, it must be replaced every year, and after the top film is covered, pressure film lines should be put on.

Control the heat retention and moisture retention effects of film mulching. In the early stage after film mulching is completed, the temperature inside the greenhouse should not be too high. About one month after film mulching, the seeds begin to germinate, and the temperature inside the greenhouse should not be too high.

5. Later management work

In the later stage of grape planting, a layer of reflective film should be laid on the original film-mulching infrastructure, so that the light intensity inside the greenhouse can be controlled at about thirty percent, which is very effective for plant photosynthesis. Usually, certain nutrients should be provided according to the growth condition of the grapes. The fertilizers required at different growth stages are different. For example, during the fruit expansion stage, it is best to ensure the use of phosphorus and potassium fertilizers to promote plant growth.

In winter, attention should be paid to the pruning work of grapes, and the relatively longer parts of the grapevine should be the main pruning targets.