A Preliminary Study on the Flowering and Fruitfulness in Pinus massoniana

It was found that juvenile trees of Masson Pine would be flowering at age of 2 and might greatly fruit at age 6. 87.3% of mature trees had cones, and 12.7% had not. Because of year variation in cone production, there appeared bumper harvest year and lean year alternately. Based on the observation of the distribution of cone production within crown, we found that the differences existed were relative to tree truck, cardinal directions and ages of branches. Site condition was one of the main factors affecting the fruitfulness. The fruitfulness law revealed in the paper would provided biological basis for management of seed orchard and seed-tree stand of Masson Pine.