Cultivation and planting of grape seedlings
Seedling growth, high survival rate, high yield, strong disease resistance and high cold resistance are the basis for cultivating high-quality grape seedlings. Grape varieties have been improved. When the ground temperature rises to about 9℃, planting will begin from late February to early March, not later than mid-March. Don't be too early, otherwise it will increase the management trouble. If the grapes enter the bleeding stage too late, the seedlings will flow after injury, which will affect the survival.
Planting specifications. Grape seedlings are planted in the center line of planting ditch, and the spacing between plants depends on the frame. The plant spacing of double cross V-frame is about 1 m, that of single hedge frame is about 1.2 m, and that of shed frame is about 1.5 m. ..
When planting, first pull two lines on the center line of planting ditch, use small bamboo as spacing ruler, and open the pond after positioning. The pond is about 20 cm deep, but you can't reach the top layer of straw to prevent it from rotting. The bottom of the pond should be dug flat, not pointed. The size of the pond depends on the root system of the seedlings. When planting, the seedlings should be placed vertically in the pond, and the roots should be stretched and not distorted. Long roots can be cut, but not randomly. Roots should be evenly distributed in the pond, and seedlings should be straight from front to back and from left to right as in the past. After the seedlings are placed, fill in half of the soil first, then lift the seedlings up slightly, so that the roots of the seedlings can be closely combined with the filled soil, and then fill in the other half of the soil, which is practical. Water should be poured once after planting, preferably with manure, but the concentration should not be high to prevent root injury. Seedlings should be planted shallowly, especially grafted seedlings, and the rootstock should be exposed 5- 10 cm to prevent the scion from taking root. Choose sunny or cloudy planting. The soil is too wet for planting after the rain.
After the seedlings are planted, cover them with black plastic film to raise the ground temperature and promote the early growth of seedlings. After the plastic film is covered, make a hole in the seedlings to expose them.
It is best to treat seedlings with chemicals before planting (those that have been treated and disinfected do not need to be treated). The survival rate and seedling growth can be improved by soaking the upper part (3-5 seconds) with the mixed solution of Baume 5 degree sulfur mixture and 0.5% sodium pentachloride, and soaking the roots with clear water for 6-8 hours.