Dissertation Research: Phosphorus Cycling and Conservation Mechanisms in the Rooting Zone of an Oligotrophic Pitch Pine Forest

许多贫营养森林的磷流失是 由于生物控制水平高， 在森林地面上骑自行车。 矿化磷是 迅速被根部和微生物吸收， 从根区淋溶或用美孚固定 铝。 作为沃格特博士的学生，大卫·普朗科弗先生将 检查外生真菌在循环中的作用， 高地草地林地土壤磷的保存 新泽西松林中的一片松树林。 他假设 菌根组织是重要的储存库 水库为P释放的分解以外的主要 生长季节 这种存储最大限度地减少了 不溶性磷铝化合物及磷的浸出 有机金属磷酸盐复合物。 每月抽样用于确定季节性模式 磷和铝的储存和移动。 抽样包括 测量植物生物量积累、根和 菌根生产力和周转、输入和淋溶 以及土壤层中P和Al的形态。 影响根区磷素淋失的主要因素 将被确定。 进行实验操作以研究 具体方面的P保护包括：去除 杜鹃花科植物，凋落物的增加和清除，P 施肥和增加有效铝。 本研究探讨了根中磷素的保存机制， 菌根系统解决的重要问题， 森林管理和养护。 这些信息将 有助于保护温带和热带 森林生态系统 沃格特博士是一位经验丰富、多产的科学家 谁是很有资格指导博士研究， 大卫·普莱克弗。 Publicover先生也是高素质的 具有林业、林业管理、森林 研究和指导。 林业学院和 耶鲁大学的环境研究具有特殊的 支持这项研究工作的资源。

Phosphorus losses from many oligotrophic forests are extremely low due to a high level of biological control over P cycling within the forest floor. Mineralized phosphorus is quickly taken up by roots and microorganisms, preventing its leaching from the rooting zone or its fixation by mobil aluminum. As a student of Dr. Vogt, Mr. David Publicover will examine the role of ectomycorrhizae in the cycling and conservation of P within the forest floor of an upland pitch pine forest in the New Jersey Pine Barrens. He hypothesizes that mycorrhizal tissue acts as an important storage reservoir for P released by decomposition outside of the main growing season. This storage minimizes formation of insoluble P- Al compounds and leaching of P in organometallic-phosphate complexes. Monthly sampling is used to determine seasonal patterns of P and Al storage and movement. Sampling includes measurement of plant biomass accumulation, root and mycorrhizal productivity and turnover, input to and leaching from soil horizons, and P and Al fractions in soil horizons. Primary factors controlling P leaching from the rooting zone will be determined. Experimental manipulations undertaken to investigate specific aspects of P conservation include: removal of ericaceous plants, augmentation and removal of litterfall, P fertilization, and augmentation of available Al. This work on P conservation mechanisms in the root and mychorrhizal system addresses important issues in the area of forest management and conservation. This information will help in the preservation of both temperate and tropical forest ecosystems. Dr. Vogt is a very experienced and productive scientist who is well qualified to direct the doctoral research of David Publicover. Mr. Publicover is also highly qualified with experience in forestry, forestry management, forest research and instruction. The School of Forestry and Environmental Studies at Yale University has exceptional resources for supporting this research effort.