Grafting grapes is a good way to quickly nurse and replace old trees. Grafting time in the slack season after summer sowing. With woody green shoots, graft survival rate of up to 95%. Each person can receive 500 to 800 seedlings per day. After the new branches are picked, the new branches can be ligninized before autumn, they can safely pass winter, the joints heal well, and the quality of seedlings is high.
The technical points of the new method of green branch grafting are as follows: The grafted petioles are grafted with no petiole grafting, so that they are tightly packed, airtight, and have a high survival rate. Grafted leaf buds were grafted for winter buds, winter buds were strong, and new branches that sprouted after grafting survived were robust and fully lignified before fall. Afterwards, the scion is wrapped with a thin plastic strip, so that it is airtight and does not lose water. It is easy to survive, and the thick rootstock is used to tie the rootstock joints to facilitate healing.
The specific method of operation is as follows:
1. Rootstock Rootstocks with 2 or 1 year old roots with well-developed, vigorously growing Kyoho seedlings are used as rootstocks, which are planted at a spacing of 50 to 60 cm and spacing between 30 and 40 cm. After planting watering, timely flattening (leaving two full shoots at the bottom of each seedling), after germination, only one strong shoot is left to grow upwards, and the axillary buds are wiped off. When the seedlings grow seven or eight leaves, the flat top is used to make the seedlings. sturdy.
Second, scion selection of good varieties, disease-free, moderate thickness of robust shoots as scion, used as scion branches on the inflorescence and axillary shoots in the first 20 to 30 days before removal.
Third, the grafting time is generally from the end of May to June, Ningzao Do not be late, grafting before the nursery watering two or three days before. Grafting after 9:00 a.m. on a sunny day, the cutter uses a single-edged razor. The thickness of the rootstock seedling and the thickness of the scion branch must be approximately the same and must be semi-lignified, that is, the medullary heart of the stem is whitish. Scion should be used with the mining, if you need long-distance mining scion, you can use a wide-mouth thermos storage and transportation, bottle ice cooling and moisturizing to prevent scion and water loss.
Fourth, grafting when the rootstock seedlings from the ground 10 to 12 cm cut into a flat rake, flat gargle with a knife cut down the middle of the 3 cm incision, the incision to the north-south direction, insert the scion buds southward conducive to growth. Scion buds should be full and round, remove the shoot buds next to winter buds, and remove all petioles under winter buds. Each scion is 5 cm long, leaving 1 cm at the top of the scion bud and 4 cm at the lower end. The 1 cm at both sides of the scion bud is wedged 2.5 to 3 cm long under the isotropic cut. The cuts should be smooth and smooth. Insert the cut scion into the cut of the rootstock, align the forming layer on one side, ie, align the skin layer, wrap the rootstock with a plastic strip of 1 to 1.2 cm in width and 20 to 25 cm in length, bind it from the bottom up, and then use thin The plastic strip wraps all the scion tightly and only exposes the bud. After the water is poured, the water is poured once. After the water is dry, it is watered in time. After that, the new shoots are sprouted from 7 days to 10 days. When the new shoots reach 20 to 25 centimeters in height, they must be tied in a timely manner to prevent the wind from lodging. Always wipe out the axillary buds on the anvil. Grafting seedlings grow 7 to 8 leaves when they are sharpened to remove tendrils and inflorescences. After hitting the tip, new shoots are drawn from the leaves, leaving one bud at the top to extend upwards, leaving one leaf to the other leaves to pick (that is, tipping). The topmost shoots are retained, and when they grow 7 to 8 leaves, they are sharpened. After that, pay attention to the prevention of pests and diseases. Spray 0.2% potassium dihydrogen phosphate or foliar leaf fertilizer every 20 days for 2 to 3 consecutive applications. In the spring of the following year, the plastic tape of the grafted part was removed and transplanted and planted.
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