Effect of Stump Cutting on the Forest Yield of Phyllostachys heterocycla
Gu Zhikang1, Song Xuzhong2, Xie Jinzhong3, Zhang Wei3, Yang Qianqian4, Yang Hua2, Xu Xiaoyun2, Leng Huanan1, Wu Jianming1
1 Huzhou Forestry Institute, Huzhou 313000, Zhejiang, China; 2 Zhejiang Forestry Academy, Hangzhou 310023, Zhejiang, China; 3 Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China; 4 Huzhou Branch of East China Forest Right Exchange Centre, Huzhou 313000, Zhejiang, China
Abstract：The effect of 4 types of stump cutting intensity (0 culm/ha, 225 culms/ha, 450 culms/ha and 675 culms/ha) on Phyllostachys heterocycla forest was studied. The results showed that stump cutting could significantly improve the productivity of Ph. heterocycla forest and the quality of the timber produced; as the intensity of stump cutting grows, new bamboo biomass and quality presents a stably growing trend; the stump cutting intensity at 675 culms/ha has better effect than other cutting intensity; in the Ph. heterocycla forest where the cutting intensity is at 675 culms/ha, the new-bamboo biomass is as high as 35.4 t/ha, up 27.57% than the CK plots, the density of large-diameter bamboo (DBH > 10cm) is 1.43 times of the CK plots, and the internode length at breast height is 1.8 cm more compared with the culms in CK plots. Furth more, stump cutting can substantially improve the quality of medium and small diameter culms, and thus boost the overall benefits in cultivating timber bamboo plantation.