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Muskmelon Grafting Tube
The survival of grafted seedlings largely depends on the care provided after the grafting process. Typically, it takes about 10 to 12 days for the grafted plants to establish themselves. During this critical period, attention must be given to temperature control, moisture retention, and shading.
1. **Temperature Management**: The ideal daytime temperature for healing is between 25°C and 30°C, while nighttime temperatures should range from 18°C to 20°C. Temperatures above 40°C or below 10°C can negatively impact survival. On sunny days, cover the area to reduce heat, and on colder nights, provide additional insulation. After 5 to 7 days, maintain a daytime temperature of 30°C to 32°C and night temperatures above 15°C, with a soil temperature around 20°C. By day 7 to 12, adjust to 28°C to 30°C during the day and 13°C at night, with a ground temperature of 18°C.
2. **Moisture Control**: Minimizing water loss from the scion is essential for successful grafting. Low humidity in the seedbed can cause the scions to dry out and wilt, which severely affects survival. To maintain proper humidity, water the seedbed thoroughly before grafting and ensure the small greenhouse is tightly sealed. For the first 3 to 7 days, keep the humidity between 85% and 90%. After that, it can be reduced slightly to 80% to 85%. About 10 days after grafting, new leaves will begin to appear, indicating the seedlings have survived.
3. **Shading**: Cover the grafted area with shade cloth for the first 3 days to protect it from direct sunlight. Too much shade can cause yellowing of the seedlings, so it’s important to gradually increase light exposure. Remove the shade after 3 days, allowing more light as the seedlings adapt. By day 7, shading is no longer needed, and the plants can receive full light.
4. **Ventilation**: In the first 3 days after grafting, open the cover briefly once or twice a day to allow for air circulation. Once the new leaves start growing (around day 5), gradually increase the ventilation time and size of the openings. This helps prevent excessive humidity buildup and promotes healthy growth.
5. **Removing Rootstock Shoots**: After removing the rootstock's growing tip, lateral buds may continue to sprout. These can compete with the scion for nutrients, reducing the chances of survival. It’s important to remove these shoots promptly, being careful not to damage the cotyledons or loosen the graft union.
6. **Cutting the Root**: After 10 to 12 days, cut the hypocotyl of the scion just below the graft union, about 0.5 to 1 cm from the interface. Start by cutting a few roots first, and if the plant shows no signs of wilting, proceed to remove the rest the next day. If the weather is hot and sunny, provide shade and mist the plants to prevent stress.
7. **Removing the Graft Clip**: Once the grafted seedling has started producing new leaves, it indicates successful healing. Remove the clip after 10 days. If the graft hasn’t fully healed, you can slowly remove the clip over time. Avoid leaving the clip on too long, as it may restrict growth and development.