EROC:Interactions of Nitrogen, Phosphorus and other Elements During Long-Term Soil Development: Contributions to Nutrient Limitation

作者：Peter M Vitousek@leland.Stanford.EDU在备注日期：5/28/96 7：41 PM优先：正常到：cdahm at NSF2主题：Re：deb-9628803我的修订预算正在通过我们的程序，很快就会到达您的手中；我的非技术性语言摘要如下所示。按照你认为最好的方式修改--如果你能就如何更好地完成这项(重要的)任务提供反馈，我将非常感激。在技术方面--我接受专家小组的建议，不将世纪公司作为唯一的集成工具--但我不认为为这些系统编写我们自己的模型是一种非常有成效的方法。我希望做的是用我们在这里学到的东西来影响人们如何对这些过程进行建模；将其与Century捆绑在一起是有限的，开发我们自己的模型对这些系统来说是“最好的”，甚至更是如此……总结：土壤肥力控制着植物生产和生态系统的许多其他方面。氮和磷是控制土壤肥力的最重要的养分，生态系统的性质及其对自然和人类造成的变化的反应都不同，这取决于氮或磷是处于最短缺的供应。这项研究旨在确定氮和磷循环之间的相互作用如何控制生态系统中的植物生产，以及产生什么后果。它利用了夏威夷的一组森林，这些森林的土壤年龄从300年到410万年不等。大多数因素，包括树种，在这一序列上是恒定的，但年轻土壤上的肥力受氮控制，而老土壤上的肥力受磷控制。因此，这些地点有助于我们了解调节土壤肥力及其后果的基本过程。如果合适的话，我很乐意再试一次。带着最美好的祝愿，彼得·维图塞克

Author: Peter M Vitousek vitousek@leland.Stanford.EDU at NOTE Date: 5/28/96 7:41 PM Priority: Normal TO: cdahm at nsf2 Subject: Re: DEB-9628803 ------------------------------- Message Contents ------------------------------- Hello Cliff, Thank you for the good news on the proposal. My revised budgets are making their way through our process and will get to you soon; my abstract in non-technical language is below. Revise away as you think best - and I would appreciate feedback on how to do this (important) task better. On a technical note - I take the panel's recommendation not to use Century as the sole vehicle for integration - but I don't think writing our own model for these systems is a very productive approach. What I hope to do is use what we learn here to affect how people in general model these processes; tying it to Century is limiting, developing our own model that's "best" for these systems is even more so... And - the summary: Soil fertility controls plant production and many other aspects of ecosystems. Nitrogen and phosphorus are the most important of the nutrients governing soil fertility, and both the nature of ecosystems and their responses to natural and human-caused change differ depending on whether nitrogen or phosphorus is in the shortest supply. This research is designed to determine how interactions between the cycles of nitrogen and phosphorus control plant production in ecosystems, and with what consequences. It makes use of a set of forests in Hawaii that range in soil age from 300 to 4,100,000 year. Most factors, including tree species, are constant on this sequence, but fertility on young soils is controlled by nitrogen, while that on old soils is phosphorus controlled. The sites thus facilitate our understanding of the basic processes that regulate soil fertility and its consequences. And I'll be happy to take another crack at it, if appropriate. With best wishes, Peter Vitousek