Collaborative Research: Reorganization of Nutrient Capital in a Northern Hardwood Forest After a Whole-Tree Harvest

再生北方硬地有机质和养分动态 将研究全树采伐后的木材林。 将特别注意模式的变化， 植被中有机质和养分库的数量 采伐后第4年和第5年， 根 研究将强调，因为响应这种变化， 森林系统的地下部分知之甚少。 在这方面将使用一些最先进的技术。 study. 例如，各种植物的相对贡献 将确定物种对土壤中有机物储量的影响 使用铜氧化技术。 这是一个程序， 确定木质素中酚类单体的比例， 植物组织 初步证据显示， 单体的比例和比例的变化是 物种特异性。 发达的森林生长和水文模型将有助于 综合从这项研究中得出的数据。 的 研究计划还包括以下方面的进一步发展： 森林生长模型的地面部分。 这项研究将加深我们对森林 从骚乱中恢复过来。 从这项研究中获得的知识 对于制定明智的管理计划至关重要 自然资源，国家森林。 研究人员之间的合作研究努力， 宾夕法尼亚大学和康奈尔大学将在 在牛津大学研究人员的贡献下， 怀俄明州和耶鲁大学。 所有参与研究的科学家 这项研究是富有成效。 所有涉及的设施 机构是优秀的。 研究正在进行中， 位于新罕布什尔州中北部的哈伯德布鲁克实验森林 那里的场地设施也很好。

Organic matter and nutrient dynamics in a regrowing northern hard wood forest following a whole-tree harvest will be studied. Particular attention will be paid to changes in the patterns and magnitudes of organic matter and nutrient pools in the vegetation and soils of a system in years four and five after cutting. Root studies will be emphasized since response to change of this belowground component of forest systems in very poorly known. A number of state-of-the-art techniques will be used in this study. For example, the relative contributions of various plant species to organic matter stocks in the soil will be determined using the cupric oxidation technique. This is a procedure for identifying the proportions of phenolic monomers in lignin of plant tissues. Preliminary evidence suggests that the initial proportions and changes in the proportions of the monomers are species specific. Well developed forest growth and hydrologic models will aid in the synthesis of the data derived from this research. The research plan also includes further development of the below- ground portion of the forest growth model. This research will add to our understanding of how forests recover from disturbance. The knowledge gained from this study is important for developing wise management plans for a critical natural resource, the nations forests. The collaborative research effort between researchers at the University of Pennsylvania and Cornell University will be augmented by contributions from researchers at the University of Wyoming and Yale University. All of the scientists involved in the study are productive. The facilities at all involved institutions are excellent. The research being done at the Hubbard Brook Experiment Forest in north central New Hampshire and the field facilities there are excellent.