In the planting technology of red milk grape, Xinlong grape seedlings generally rise above 5℃ in the north before the soil freezes in autumn or spring, and fall in the autumn leaves in the south until February of the following year. In view of the vigorous growth of red milk, in order to produce high-quality fruit, it is suggested that hedgerows should be used in both north and south. According to the determined row direction and row spacing, dig a planting ditch with a width of 50-70 cm and a depth of 35-80 cm in the middle of the border, and place weeds and perishable straws at the bottom of the ditch.
Fertilize in the ditch, apply 4-5 cubic meters of pig manure, 3-4 cubic meters of sheep manure, or 2 cubic meters of decomposed chicken manure plus phosphate fertilizer 100 kg per mu, and mix well with soil. The middle and lower parts are filled with surface soil, and the surface is covered with lower soil. Plant spacing: 0.7m× 3m in the north, with 330 plants planted per mu; The south is 0.7m× 3m, with 330 plants planted per mu. Water immediately after planting to make the soil firm.
Third, post-planting management. In the planting technology of red milk grape, we should smooth the tillering buds of rootstock in time, choose strong grafting buds as the main vines, smooth the redundant buds, and pull the vertical rods in time to make the seedlings stand upright. Annual seedlings should be watered frequently. When pruning in winter, it should be noted that the diameter of the cut above the ground 1 m should not be less than 1 cm, and the diameter of the side branch above 50 cm 1 m can be used as the bearing branch in the second year.
Four, Xinlong grape seedlings two-year seedling management:
(1) After excavation and before germination, water to accelerate germination and cooperate with fertilization.
⑵ Wipe the buds in time, and the principle is to remove the weak and stay strong.
⑶ Fixed branches: When the new branches grow to 5- 10 cm, it is advisable to keep 10- 15 branches per square meter or keep the distance between new branches at 25-30 cm.
⑶ Watering: water and fertilize 7- 10 days before flowering, start water and fertilize on 10-5 days after flowering, and water every 1 0 days before fruit growth and grape coloring.
5. Picking new shoots: about 7 days before flowering, leave 10 leaves on inflorescence and 12 leaves on developing branches for coring.
[6] Secondary branch treatment: leave 1-2 secondary branches at the top of bearing mother branches, erase the rest, leave 2-3 leaves at the top of secondary branches for coring, and leave 1 leaf for developing branches for repeated coring.
(7) Fruit bagging: In the planting technology of red milk grapes, fungicides are sprayed 7- 10 days after flowering, and bagging can be carried out the next day, and bagging can be completed within 20 days after flowering.
(8) Pruning in winter: generally, it is carried out after defoliation to the following spring. When pruning in winter, the thickness of fruiting branches should not be less than 0.8 cm, and the cutting mouth should be 3-5 cm before bud. Short, medium and short branches can be pruned, or the combination of long, medium and short branches can be pruned.
⑼ Covering the soil for cold protection: In the planting technology of red milk grapes, the soil is generally covered for cold protection after winter cutting 10- 15 days and before the soil is frozen. After pruning in winter, spray 1-3 degree stone sulfur mixture on the trees in the Yangtze River basin or Jiangnan area.