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

作者：Peter M Vitousek vitousek@leland.斯坦福大学.EDU at NOTE日期： 1996年5月28日7：41 PM优先级：正常收件人：cdahm at nsf 2主题：回复：DEB-9628803 - 谢谢你的建议的好消息。 我修改后的预算正在通过我们的程序，很快就会给你;我的摘要 下面是非技术性语言。 你觉得怎样最好就怎样修改-我 希望得到关于如何更好地完成这项（重要）任务的反馈。 从技术上讲，我接受专家组的建议，不要将世纪作为整合的唯一工具，但我不认为编写我们的 对于这些系统来说，自己的模型是一种非常有效的方法。 我希望 我们要做的就是利用我们在这里学到的知识来影响人们对这些 过程;将其与世纪联系起来是有限的，开发我们自己的模型， 这些系统的“最佳”更是如此。 和-总结： 土壤肥力控制着植物产量和许多其他方面， 生态系统 氮和磷是最重要的营养素 管理土壤肥力，以及生态系统的性质及其反应 对自然和人为变化的影响不同，这取决于氮或 磷的供应量最少。 这项研究旨在确定 氮磷循环之间的相互作用如何控制植物 生态系统中的生产，以及产生的后果。 它利用了夏威夷的一系列森林，这些森林的土壤年龄从300年到410万年不等。 最 因子，包括树种，在这个序列上是恒定的，但是生育力， 幼龄土的氮素控制，老龄土的磷素控制 控制。 因此，这些地点有助于我们理解基本过程 调节土壤肥力及其后果。 如果合适的话，我很乐意再试试。 谨致以最良好的祝愿， 彼得·维陶塞克

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