Study on Grafting Seedlings Technology of Camellia oleifera Bud Rootstock in Guangnan County

In order to improve the graft survival rate and shorten the seedling breeding time of Camellia oleifera. Effects of scions with different lignification degrees, different planting depths, different grafting time, different binding materials, and different height of small shed on the graft survival rate and growth amount of Camellia oleifera were studied from 2019 to 2020. The results showed that: (1) The survival rate, ground diameter and height were affected by the five factors above. The survival rate of lignified scion was the highest about 75.56%, which was significantly different from that shoots. The ground diameter of seedling height was also the largest at the five time periods. (2) In terms of different planting depths, the highest survival rate and the highest ground diameter was the depth of 6cm, which was significantly different from that of the control. Moreover, more branches were appeared in all three treatment groups, which indicated that they could formed faster, leave the nursery earlier, and get into the forest earlier. (3) In the height test of small arch shed experiment, the survival rate of small shed height of 40 cm was the highest, reaching 78.52％, and the average seedling height was the largest, which was 3.1 cm different from the minimum seedling height (that is, the height of the small arch shed is 30cm), and the difference is significant. In terms of ground diameter, the average ground diameter of treatment B (the height of small arch shed is 35cm) is the largest, which is significantly different from that of treatment C. (4) In the experiment of different binding materials, the survival rate and seedlings height of aluminum foil as binding material were higher than those of grafted seedlings bound by plastic film, and the survival rate of aluminum foil was 85.56%, which was 25% higher than that of plastic film, with significant difference. But the difference of ground diameter was not significant. (5) In different grafting times, the grafting on May 27 was significantly different from other experimental groups, with the highest survival rate, seedling height and biomass accumulation, which was significantly different from the grafting on June 27 and July 10, indicating that the best grafting time for the grafted seedlings of Camellia oleifera bud rootstock was in May, and the grafting effect in June and July was not good.