Share the key points of grafting and propagation techniques of Ginkgo biloba seedlings.

Grafting propagation of bud seedling rootstock is a new technology developed in recent years, which has the advantages of one year shorter seedling raising time, higher survival rate, better seedling quality and lower cost than the common grafting method. Below, I would like to share with you the key points of seedling grafting and propagation of Ginkgo biloba, which can be used for reference.

The main results are as follows: 1. The seeds were first germinated and cultured indoors, and the germinated seeds were raised in a nutrition bowl with 1 seed in each bowl. Seeds should be placed on the side, so that the radicle grows downward, the Hypocotyl grows upward, does not bend, and is easy to graft. Cover the right amount of nutritious soil, and then put the seedling nutrition bowl into the greenhouse.

2. The temperature of the seedlings was controlled at 25 ℃ 30 ℃ before unearthed, and 20-25 ℃ after the seedlings were unearthed, which enhanced the light and promoted the root and stem growth. When the germ grows to 3 cm and the first pair of true leaves are about to unfold, they can be grafted as seedling rootstocks.

3. In the middle of March, before the branches and buds germinated, 1-2-year-old branches with full bud development and thickness of 0.3 ℃ and 0.4 cm were collected from the mature mother trees, which were wrapped in plastic film and stored in cold storage or refrigerator at a low temperature of 0-2 mol. When the young buds of the rootstock are about to show their true leaves, the seedlings are grafted.

4. Cut the anvil bud about 3 cm above the petiole and make a 2 cm incision along the petiole along the center of the embryo stem. Cut into a wedge below the scion, 1.5 cm long on both sides of the cutting surface, with 1-2 buds at the top. Insert the cut scion into the interface, then tie it up with plastic tape and still put it in the greenhouse. Because the rootstock is young, the scion is short, and the healing is slow, warm water is sprayed once every morning and evening. Keep the temperature in the greenhouse 20-25 ℃ and the relative humidity 80%. The scion and the rootstock of bud seedlings healed well and the scion began to germinate after about 25 min.

5. Untie in time after survival. After 15-20 days of leaf exhibition, the Kraft paper or agricultural film was cut off, planted in the nursery according to the row spacing of 40 cm × 20 cm, shaded by 50% to 60%, and removed in late August.

6. The grafted seedlings can hang fruit 3-4 years after planting, and keep the excellent characteristics of scion, such as fast growth, high yield, easy planting and so on.

The above is a summary of the new grafting technology for everyone, only for reference, the specific implementation is also recommended to the local agricultural machinery department to do detailed consultation.

In addition, the propagation methods of ginkgo biloba include root tiller seedling transplantation and sowing seedlings. After the Spring Festival and before the Qingming Festival, tiller seedlings can be dug and planted, with many fine roots, and should not be watered with heavy water. the method is simple, the survival rate is high and the growth is fast. Large area cultivation needs sowing and raising seedlings, spring sowing is suitable, and strip sowing method is often used.