Growth and Development Law of Annual Sown Seedings of Photinia prunifolia and Preliminary Exploration on Seeding Breeding Technology

: In this paper, we studied the height and ground diameter growth of annual seedlings of Photinia prunifolia, and introduced its the morphological characteristic and geographical distribution. At the same time, through the seedling sowing and breeding experiment, we used the ordered sample clustering analysis method to analyze the high growth process of seedlings sown in Photinia prunifolia . We divided the growth of seedlings into four different growth periods, seedling stage, growth stage, rapid growth stage and later growth stage according to the experimental investigation. The seedling stage and growth stage of Photinia prunifolia were 30 days. The initial growth period lasted for about 48 days. The rapid growth stage lasted for 120 days, which was 10.1 times and 5.2 times higher than the seedling height and ground diameter growth in initial growth period, respectively. In later growth stage, the seedling height and ground diameter grew quite slowly. The