不同经营模式对贵州毛竹林分质量的影响

研究了母竹林、材用林和景观林3种经营模式的毛竹林在林分结构和土壤理化性质上的差异。结果显示：不同经营模式的毛竹林,其林分结构、植物多样性指数、地上生物量以及土壤理化性质的变化规律符合毛竹林结构变化的一般规律,这些经营模式可在生产上应用;景观林是一种近自然经营模式,竹林生产力较小,年龄结构老化,土壤理化性质较好;材用林新生竹径级和株数率呈上升趋势,土壤质量指标与景观林间差异显著;母竹林初次强度采伐降低了林分质量,提高了小径竹株数,是一种破坏性经营模式,由于经营措施的频繁干扰,土壤性质界于材用林与景观林之间;3种经营模式的经营措施可相互借鉴。

Influence of Management Models on Stand Quality of Phyllostachys heterocycla cv.Pubescens in Guizhou Province

Three management models of Phyllostachys heterocycla cv. Pubescens, i.e., mother bamboo forest, timber bamboo forest and landscape bamboo forest, were studied for the difference in stand structure and soil physical and chemical properties in Guizhou province. The results showed that： （1） Stand structure, plant diversity index, aboveground biomass and soil physical and chemical properties of Ph. heterocycla ev. Pubescens under the three management models conform to the general structure changing rules ofmoso forest, which indicated that the management models can be applied to production; （2） Landscape bamboo forest is under close-to-nature management model with lower productivity and old age-structure but better soil quality; （3） Timber bamboo forest saw the rise in diameters and number of new bamboo, and its soil quality indicators were significantly different from those of landscape bamboo forest; （4） Mother bamboo forest had a reduced stand quality and improved numbers of small-diameter bamboo after primary strength cutting, which is a destructive operation, and due to the frequent application of management measures, soil quality indicators were between timber bamboo and landscape bamboo forest. The measures taken in the three management models could be learnt from each other.