[ Agricultural Products Network] China is the world's ZUI big watermelon producing area, but the origin of watermelon is different. One way of saying that watermelon is not from China, but from Africa, it came from the Western Region, hence the name watermelon. Another way of saying comes from the legend of Shennong's taste of the herb. It is said that the watermelon was discovered when Shennong tasted the herb. The original name was the melon, which means the melon with juicy meat, but it was later passed into the watermelon. The following small series and everyone talk about the grafting technology of watermelon:

First, the rootstock varieties of melon varieties require stable affinity, disease resistance and certain resistance. There are mainly long melons, round melons, long stem gourds, "phases" and so on. "Phase" is a hybrid introduced from Japan, with developed roots, good growth at low temperatures, stable fruit setting, high yield and good quality.

Pumpkins use black pumpkins. The first-generation varieties are introduced from Japan's "New Dazu", "Early Health New Tuzuo", Chaofeng F1 and so on.

Second, the scion variety is produced according to the condition of its ordinary seedlings.

Third, the proper sowing date of the rootstock and the scion is 3-4 days early using the plug-in pumpkin rootstock.

Fourth, seed treatment and seeding methods

The first is rootstock seed treatment. After picking the seeds of the melon seeds, they are air-dried, hot-baked with 60-65 °C hot water, and continuously stirred for 24 to 36 hours after the water temperature is lowered. The shell is softened by artificial shelling (ie, opening a small mouth at the germination mouth of the seed), and germination is carried out at a constant temperature of 25-30 ° C. The seeds are washed once with water at 35 ° C for 12 hours, and the seeds can be sown after being exposed to white. The amount of pumpkin used is 300-400 grams. The seeds are first put into hot water of 55-60 °C for 10 minutes, and the mixture is stirred constantly to make the heat uniform. After the temperature is lowered, the seeds are soaked for 8 hours, then the seeds are washed and removed. The surface mucus is placed in germination at 28-30 ° C, washed once in the morning and evening with warm water at 30 ° C, and sown when the bud length is 1-2 mm.

Scion seed treatment and watermelon seed treatment generally adopt the common soaking and germination method.

5. The grafting method adopts the plugging method, that is, when one true leaf of the rootstock seedlings is removed, the true leaves are removed, and a small hole is marked on the hypocotyls with a bamboo stick. When the hypocotyl is fine, the puncture hole should be vertical; when the hypocotyl is thick, the puncture hole can be slightly inclined to the position where the cotyledon is born. The freshly-cut scion seedlings were cut at 1 cm below the cotyledons, and the epidermis on both sides of the hypocotyls were cut off (the tip was sharpened), and then the scion was inserted into the punched holes in the rootstock and fixed with clips.

After grafting, the seedlings will be shaded with a Sunshade Net on the same day or the next day; after 3-4 days, the sunshade net will be removed for 1 hour in the morning and evening, lasting 5-6 days (gradually lengthening the light seeing time); after 7-8 days, the sunshade can be removed. Net, then turned to normal management.

The ground temperature should be maintained between 25-28 degrees within 7 days of grafting. The temperature is too low, the survival rate is not high, the wound healing is slow; the temperature is too high, and the wound is prone to rot. Grafting can not be watered for 1-2 days, ZUI has a slightly higher air humidity, but the air humidity can not be too high, otherwise it will easily rot.