1. The affinity of rootstocks and scions with strong affinity is the ability of rootstocks and scions to heal by grafting. Under normal circumstances, the closer the affinity, the stronger the affinity, the higher the survival rate of grafting. Second, the selection of viable rootstocks and scions is related to the accumulation of nutrients in rootstocks and scion's vegetative organs. The more nutrients accumulated by vegetative organs, the more vigorous the development is, the stronger the viability is. Therefore, rootstocks should be strengthened before grafting. The management of water and fertilizers allows them to accumulate more nutrients, and select mature shoots with full shoots for scion. Third, choose the best grafting time General branch should be carried out in the early spring before the fruit germination, because at this time the rootstock and scion organization is full, temperature and humidity are also conducive to the formation of a layer of vigorous splitting and accelerate wound healing. Buds should be selected in the slow growth phase, to survive this year grafting, sprouting seedlings next spring is better. Fourth, the use of plant hormones to promote healing Scion treated with plant hormones before grafting, such as 200-300PPM naphthalene Acetate soaked for 6-8 hours, can promote the activity of the formation layer, thereby promoting wound healing to improve the survival rate of grafting. Fifth, regulate the technical operation Grafting action should be rapid, and strictly according to the technology to cut the rootstock and scion, the junction should be smooth, so that the formation of the rootstock and scion tightly connected, tied loose and moderate, and timely unbundling.
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