| 摘要: |
| 【目的】优化森林经营模式，以提高东北天然次生林生物量。【方法】以东北针叶林、阔叶林、针阔混交林为研究对象，通过设置样地并分林层（乔木层、灌木层、草木层、凋落物）进行调查与测算的方法，分析粗放经营、目标树经营和无干扰3种经营模式下天然次生林生物量的变化。【结果】1）针叶林、阔叶林中林分总体生物量排序为目标树经营>无干扰>粗放经营，针阔混交林中林分总体生物量排序为目标树经营>粗放经营>无干扰，目标树经营与无干扰、粗放经营间差异显著，乔木层占林分生物量的比例均在92%以上；2）乔木层生物量排序均为目标树经营>无干扰>粗放经营，目标树经营模式下乔木层生物量与无干扰、粗放经营间差异显著，其中干材生物量最大，占乔木层生物量的46.52%～68.33%；3）针叶林、阔叶林中灌木层、〖JP2〗草本层生物量排序为无干扰>粗放经营>目标树经营，针阔混交林中灌木层、草本层生物量排序为粗放经营>无干扰>目标树经营，无干扰经营模式下的灌木层、草本层生物量与粗放经营、目标树经营间差异大多显著；4）凋落物生物量大小为目标树经营大于粗放经营和无干扰经营。【结论】目标树经营能够增加林分总体、乔木层和凋落物的生物量，可作为提高东北天然次生林生物量的重要经营模式。 |
| 关键词: 生物量 经营策略 目标树经营 东北天然次生林 |
| DOI： |
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| 基金项目:国家自然科学基金项目（31170593） |
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| Response of biomass of natural secondary forests to different forest management strategies in Northeast China |
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RONG Jian-tao,HE You-jun,LIANG Xing-yun
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| Abstract: |
| 【Objective】This study aimed to enhance biomass of natural secondary forests in Northeast China by optimizing forest management strategy.【Method】Based on survey of different layers in sample plots,the biomass changes of three natural secondary forests,coniferous forest,broad-leaved forest,and mixed conifer-broad forest,were analyzed with extensive management,target tree management,and no disturbance in Northeast China,respectively.【Results】1) In coniferous forest and broad-leaved forest,total stand biomasses were in a decreasing order of target tree management>no disturbance>extensive management.In mixed conifer-broad forest,the order was target tree management>extensive management>no disturbance.The difference between target tree management with no disturbance and extensive management was significant.Tree layer accounted for more than 92% of the total biomass.2) Biomasses of tree layer were in a decreasing order of target tree management>no disturbance>extensive management.The tree layer biomass of target tree management had significant difference from those of other two managements.Stems accounted for the greatest proportion,ranging from 46.52％ to 68.33％.3) In coniferous forest and abroad-leaved forest,biomasses in shrub layer and mixed conifer-broad forest grass layer were in a decreasing order of no disturbance>extensive management>target tree management.In mixed conifer-broad forest,biomasses in shrub layer and grass layer were in a decreasing order of extensive management>no disturbance>target tree management.The biomasses of shrub and grass in no disturbance management differed significantly with those of other two managements.4) The litter biomass of target tree management was larger than those of extensive management and no disturbance management.【Conclusion】Target tree management regime increased biomasses of stand level,tree layer,and litter.It was important management for improving the biomass of secondary forest in Northeast China. |
| Key words: biomass management strategy target tree management natural secondary forest in Northeast |
