期刊
FOREST ECOLOGY AND MANAGEMENT
卷 318, 期 -, 页码 370-379出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foreco.2013.08.028
关键词
Soil N change; Vegetation N change; Forest Floor N change; N inputs; N outputs
类别
资金
- National Science Foundation
- U.S. Forest Service
- Nevada Agricultural Experiment Station, University of Nevada, Reno
A review of forest N cycling literature indicates that most forest ecosystems contain less N than would be expected from even modest inputs of N from atmospheric deposition and N fixation over millennial time scales. Periodic fire could account for this disparity, even in humid systems during drought periods. In contrast to the millennial time scale patterns noted above, several forest ecosystems appear to accumulate more N than can be accounted for by measured or estimated inputs over decadal time scales. There appears to be some disparity between results from short term process studies and those from longer term budget analyses. Unmeasured inputs by dry deposition, non-symbiotic N fixation, or (in ecosystems with sedimentary parent materials) weathering of N from rocks may account for this occult N when it occurs. Research over the last two decades has suggested that N retained within forest ecosystems is not leached away after inputs have slowed, but remains within the system unless it is harvested or burned. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据