伐桩处理对毛竹林生产力影响研究

研究了4种伐桩处理强度(0株/hm²、225株/hm²、450株/hm²、675株/hm²)对毛竹林生产力的影响。结果表明:伐桩处理可以显著提高毛竹用材林的生产力和竹材质量;随伐桩处理强度加大,新竹生物量、新竹质量呈稳定提高的趋势;伐桩处理强度为675株/hm²的处理效果优于其他处理强度;在伐桩处理强度为675株/hm²的毛竹林中,新竹生物量高达35.4 t/hm²,较伐桩未处理林地提高了27.57%,大径级(DBH > 10 cm)新竹密度是伐桩未处理林地的1.43倍,新竹胸高处节间长度比伐桩未处理林地增加1.8 cm。此外,伐桩处理能显著提高中、小径级新竹的品质,继而提高毛竹材用林培育的整体效益。

Effect of Stump Cutting on the Forest Yield of Phyllostachys heterocycla

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.