Abstract:

A study on characteristics of the canopy and spatial distribution of leaves in P.praecox C.D. Chu.et.C.S.Chao cv.preveynalis shows that the higher the canopy, the smaller the angle between culm and branches while the angle between culm and branches is positively correlated with the density of a stand.The spatial distribution of leaves is greatly affected by the number of branches each bamboo has, DBH of the culm and the stand density.The total leaf weight of each bamboo is increased with the number of rounds of branches, with leaf quantity reaching maximum when there are 15 ~ 16 rounds of branches.Asimilar trend is found between DBH and the total leaf weight each bamboo has, with the latter being maximum when DBH is about 3.7cm, and no much changes are found in leaf weight when DBH is more than 3.7cm.Increasing the stand density leads to that the center of canopy gravity moves upwards.When a stand has a density of 25600 ~ 29200 bamboo per hectare, leaves in upper layer account for 63.13 % of the total weight of leaves, with much litter found on the ground.

Key words: Phy llostachys praecox C.D.Chu.et.C.S.Chao cv.preveynalis, Canopy characteristic, Spatial distribution