人工林长期生产力保持机制研究的背景、现状和趋势

Study on the Mechanism of Maintaining Long-term Productivity of Plantation:Background,Present Condition and Trends

国内外普遍关注人工林的稳定性问题,人工林长期生产力能否维护是当前人工林研究上的一个重要方面。特别是关于人工林是否导致地力退化,针叶林是否引起土壤酸化,一直是国际上争论的焦点。本文收集了国内外大量资料,全面反映了国内外人工林长期生产力研究现状,包括研究策略、研究方法、生态系统基本过程研究、实施人工林后立地质量变化,包括采伐剩余物处理、整地、抚育、间伐、森林收获、人工林树种本身、人工林群落结构对立地生产力的影响,对各种研究结果与结论作简要概括,同时反映不同观点,并对人工林长期立地生产力研究趋势也作了扼要阐述。

A great deal of attention had been paid on the stability of plantation in the world.Whether the long-term productivity could be maintained was an important aspect in the study on plantation.If the plantation leaded to soil degradation and if conifers cause soil acidification had been the focuses debated in the world.Based on the data collected,the authors described the present research on long-term productivity of plantation in the world,including (1) the studies on strategy,methodology,basic process of ecosystem,(2)change of site quality when plantation was established,including handling of harvest residues,site preparation,tending,thinning,forest harvest,tree species of plantation and effects of plantation community structure on site productivity.Various research achievements,conclusions and viewpoints were summarized in this paper.The research trends and research fields about long-term site productivity of plantation were also summed up.