赤水河流域紫色砂页岩组的毛竹林演替格局与林分特征变化

Study on the Changes of Stand Features with the Succession of Bamboo Forests Developed in Purple Sandy Shale Soil in Chishui River Basin

根据毛竹资源二类调查数据和岩组分布图、采用野外临时样地调查与室内分析相结合的方法,对赤水河流域紫色砂页岩组毛竹林演替格局及林分特征进行了研究。结果表明赤水河流域紫色砂页岩组毛竹林演替过程可划分为4个阶段,演替系列为阔叶林(常绿阔叶林+常绿落叶阔叶混交林+落叶阔叶林)→竹-乔混交林(竹-针混交林+竹-阔混交林)→近纯毛竹林。不同演替阶段毛竹林分结构、生物多样性、生物量、毛竹质量、植被层养分分配与土壤养分量呈规律性变化。不同演替阶段毛竹林结构受树种组成、密度和生长发育阶段的影响,近纯毛竹林适宜于营建毛竹用材林,竹-阔混交林适宜于营建毛竹防护林。

Based on the data of forest management inventory and the map of rock group distribution,and by the combination of wild temporary plots investigation and indoor analysis,the changes of stand features with the succession of Moso bamboo forests developed in purple sandy shale soil I Chishui river basin were studied.The Results showed that the succession process of Moso bamboo forest in this area could be divided into four stages as follows： broad-leaved forest（evergreen broad-leaved forest,evergreen deciduous broad-leaved mixed forest and deciduous broad-leaved forest） →Moso bamboo ＋ coniferous mixed forest →Moso bamboo ＋ broad-leaved mixed forest→nearly pure Moso bamboo forest.The forest structure,biodiversity,biomass,bamboo quality,main nutrients in vegetation above ground and in soil changed regularly with the Moso bamboo forest succession.Nearly pure Moso bamboo forests were suitable for producing commercial bamboo,and Moso bamboo and broad-leaved mixed forests were suitable for the construction of shelterbelt forests.