Summer black grape is an early-maturing seedless variety, which is usually cultivated in the open field. It takes about 100 to 120 days from germination to fruit ripening. If it is cultivated in greenhouse, it germinates early and matures earlier than in the open field, usually about one month in advance.

The growth of Xiahei grape is vigorous, the germination rate is 85%, the branching rate is as high as 95%, and each fruiting branch has an average of 1.5 inflorescences. It is an early-maturing seedless variety, with strong plant disease resistance, and it is not easy to crack and drop seeds after the fruit matures.

The ear of summer black grape is cylindrical or conical, and the fruit grains are densely planted, with an average ear weight of 670g g. The fruit is round and densely arranged, with a single grain weight of 8g. Deep blue skin, fast and consistent color, thick fruit powder and crisp flesh.

Summer black grapes are mostly planted in hedgerows in the north, and in single V-shaped or trellis in the south. The suitable row spacing for planting is 1.7m, and the spacing between plants is 0.8m Bagging should be done in time after the fruits are ripe to prevent pests, diseases, birds and pollution.

Cultivation techniques of summer black grape

1, land selection and land preparation

Grapes are usually located in relatively flat and open places, and summer black grapes are no exception. It is also necessary to ensure that the soil in the selected place has water permeability and air permeability. After land selection, it is necessary to do a good job of land preparation in the winter one year before planting, apply sole fertilizer, and control the dosage according to the planting area. Crush the clods, and then dig trenches, with the width and depth controlled at about 80m×50cm.

2, plastic scaffolding

Selection of racks: hedgerow racks are mostly used in the north, V-shaped or shed racks are mostly used in the south, and any kind of racks for summer black grapes can be used. The author advocates hedgerow cultivation, with row spacing 1.7m, plant spacing of 0.8m and 500 plants per mu.

3. Rational planting

From the end of June 1 1 to March of the following year, select robust seedlings and cut 2-3 full buds for planting. After planting, water it and cover it with black plastic film to keep moisture and prevent weeds.

4. Water and fertilizer management

Water and fertilizer management is the same as other varieties of grapes. It is suggested that organic fertilizer should be applied again in the production of summer black grape. When planting the garden, apply 5000 kilograms of organic fertilizer per mu, and then expand outward along the planting ditch every 1 year, and apply organic fertilizer 1 time, with 4000-5000 kilograms per mu.

5. Trim ears and thin fruits

Except for a few strong branches with 2 ears, 1 was removed from the other two ears, and 1 was left, and no ear was left on the weak branches and cultured branches. The ear is too long. Before flowering, pinch off the ear tip at 10d 1/5- 1/4. Black fruits should be densely planted in summer, so it is recommended to thin the fruits. Artificial fruit thinning takes too long, so it can be watered at full flowering stage and fruit-setting stage, or combined with spraying bactericide, and consciously spraying fruit ears to promote moderate flower and fruit drop.

6, pests and diseases

The main diseases of grapes are black bean disease, white rot, downy mildew and anthracnose, and the main pests are leafhopper, winged moth and mealybug. It is necessary to do a good job of prevention in time, thoroughly disinfect the orchard on a regular basis, and clean up the orchard after harvest.

In the process of planting, we should also pay attention to observing its growth frequently. When you find any abnormal situation, you must find out the main reason and deal with it in time.