The rootstock and scion incompatibility of seedlings of the same species have strong affinity and high survival rate of grafting; seedlings of the same species belonging to different species have difficulty in grafting or cannot survive. Countermeasures: When grafting seedlings, be sure to use varieties with strong affinity and strong adaptability as rootstocks.
When the grafting operation is sloppy, the rootstock and the cutting surface are not even, and the forming layers of the two rootstocks are not tightly aligned or have very few contact portions. Countermeasures: The rootstock scion noodles should be flat and smooth, the forming layers of the two must be tightly aligned, the joints tightly sealed, and the membrane can not be prematurely resolved.
Scallop sprouting or stalk sprouting and thin grafting in spring is too late. When grafting, the scions have sprouted, and then the sprouts are quickly picked up. After the water and nutrients in the scion are consumed, the interface has not yet generated the healing tissue, which will interrupt the water and nutrients; or If the buds are too weak and they send a few leaflets, they lose their ability to grow or survive. Countermeasures: Do a good job of scion storage, timely grafting, not sprouting scion and weak bud scion.
The anvil was sown early in the spring, sowing the seedlings in the early spring and the fruit seedlings grafted in the summer and autumn. After an anvil is cut, the scion and rootstock will die together. The reason is that the nutrients in the seed have been consumed, and the scion and rootstock are starved to death after cutting an anvil due to the lack of leaf-made nutrients. Countermeasures: First, after 10 days of living on the interface, the anvil stem should be broken 5/3 cm above the interface, leaving 1/3 connected, so that the upper leaves continue to produce nutrients to feed the scion and maintain the life of the rootstock until the scion grows. 30 cm high, can produce nutrients and then cut the anvil. The second is to leave 4 to 5 leaves at the bottom of the graft while grafting. After cutting the anvil, nutrients are produced from the lower leaves to supply the leaves of the seedlings.