Grafting Seedling of Watermelon: management technique of Healing stage of Watermelon after grafting

The interface healing of grafted seedlings, the survival rate, and the effect of disease resistance and yield increase are related to the affinity of rootstocks and scions, grafting methods and technical maturity. It is also directly related to the environmental conditions and management techniques after grafting. Especially the environmental management and management technology during the interface healing period. Let's take a look at the management technology of the healing period after grafting.

I. required facilities

1. The nursery bed should be set up in solar greenhouse, plastic film arch shed and other facilities in winter and spring.

2. A small plastic arch shed should also be set up on the seedbed, and be equipped with grass curtains, sunshade nets and other shading materials.

3. If the low temperature is low, a ground hotline should also be laid.

4. The cultivation is postponed in autumn and the seedling stage is in the hot summer. After grafting, it should be moved into shade, rain protection and cooling facilities.

Second, temperature

1. Too high or too low temperature will affect the interface healing.

2. The suitable temperature of watermelon grafting is 25: 28 ℃ in daytime and 20 ℃ at night.

3. The healing of grafted seedlings will be delayed by 1-2 days under 15 ℃, and the survival rate will be reduced by about 10%.

4 and 32 ℃ or more, the healing was slow and the survival rate was reduced by more than 15%.

5. In general, the conventional temperature management of seedlings can be restored after 8-10 days of grafting.

Third, humidity

The main results are as follows: 1. Immediately after grafting, the seedling bowl is watered and moved into a fully watered arch shed for strict sealing management.

2. The air humidity should be kept above 95%.

3. Warm water in winter, cold water in summer, and spray to the small arch shed, the air humidity in the shed is close to saturation.

4. Spray 2 or 3 times a day after that, and gradually ventilate and drain moisture after 7 days.

Fourth, lighting

1. All sunlight should be covered in the first three days after grafting to maintain the humidity of the seedbed and prevent high temperature.

2. But it is more important to keep scattered light in the small arch shed, and the seedlings can be exposed to low light in the early morning or in the middle of the night.

3. This can prevent cucurbit rootstocks from yellowing due to lack of sunlight.

The grafted seedlings were exposed to low light for about 1 hour in the morning and evening after 4 or 3 days.

5. After that, the light time was gradually prolonged, and after 7 days, it could only be shaded in the period of strong light at noon.

6. The grafted seedlings can be managed by conventional light when the first true leaf of the scion grows.

The above is about the acceptance of the healing stage management technology after watermelon grafting, the most important thing is to pay attention to three conditions, humidity, temperature, light and so on will have an impact on watermelon seedlings, and the first few days after grafting is a critical period. At this time, we must ensure that the humidity is in place, otherwise the grafting may not be successful!