Impacts of Clump Logging on Growth Dynamics and Economic Benefits of Bamboo (Dendrocalamus giganteus) Forest
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摘要: 为解决大型材用丛生竹龙竹传统采伐经营效益差、劳动力成本高的现状，研究以滇西南地区龙竹为研究对象，实施4种不同强度的采伐（常规择伐、1/3丛采伐、1/2丛采伐、全丛采伐），研究采伐后新竹生长恢复情况，筛选出适用于龙竹林的最佳采伐模式。结果表明：不同采伐试验后的出笋、成竹、新竹胸径等指标均存在显著差异，整体发笋、成竹情况随着丛状采伐力度的加大呈现“先上升-后下降”趋势，竹林经过3 a的恢复期基本可恢复至伐前水平。丛状采伐能够促进龙竹竹材经济效益的提升。结果证明丛状采伐在实际的竹林生产经营中具有可行性，综合竹林恢复生态效益和经济效益分析，采伐模式为1/2丛采伐时最优。Abstract: In order to address the problems of poor economic returns and soaring labor costs with traditional logging of Dendrocalamus giganteus forests, which are widely distributed in Yunnan Province of southwest China, four logging practices of different intensities were investigated, including conventional selective logging, 1/3 clump logging, 1/2 clump logging and whole clump logging. The regeneration of bamboo culms after logging was studied to determine the best logging mode for D. giganteus forests. The results showed that there were significant differences in shoot emergence, survival, DBH, and other indicators between different logging practices. The overall shoot emergence and survival rates displayed an upward-then-downward trend with the increase of logging intensity. After a respite of three years, the bamboo forests could basically recover to the pre-logging level. Furthermore, clump logging could boost the economic benefits of bamboo. The results demonstrated that the clump logging was feasible in the management of the bamboo forests. According to the analysis of overall ecological and economic benefits of bamboo forest restoration, the optimal logging mode was 1/2 clump logging.
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Key words:
- Dendrocalamus giganteus /
- Clump logging /
- Growth dynamics /
- Economic benefits
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