U.S.-China Cooperative Research Fellowship: Nitrogen Cycling and Ecological Sustainability in Agroecosystems

小行星9523944 这项建议要求支持第三年也是最后一年的博士后研究金，研究与环境有关的生物科学。 前两年的资金来自DEB 9303261。 该项目题为“农业生态系统中的氮循环和生态可持续性”，通过比较该地区现代和传统村庄的养分循环，将养分循环与农业生态系统的长期生产力联系起来。 该项目旨在调查中国太湖地区农业长期持续生产力的生态基础，目的是开发评估农业生态系统生态可持续性的量化工具。 在最初获奖的两年中，工作取得了有趣的结果，表明自然氮输入对维持传统系统的生产力很重要，但当代化学氮的输入似乎远远高于需要，并可能造成污染。 再提供一年的支持，将使PI能够完成农业生态系统管理两个年度周期的数据集，并处理数据集和得出氮循环指数。

9523944 Ellis This proposal requests support of a third and final year of a postdoctoral research fellowship in biosciences related to the environment. The first two years were funded under DEB 9303261. The project, entitled "Nitrogen Cycling and Ecological Sustainability in Agroecosystems" relates nutrient cycling to long term productivity of agroecosystems by comparing nutrient cycles found in contemporary and traditional villages of the region. The project aims to investigate the ecological basis for long-sustained productivity of agriculture in the lake Tai region of China, with a goal of developing quantitative tools for appraising ecological sustainability in agroecosystems. Work during the two years of the original award has yielded interesting results, indicating that natural nitrogen inputs were important to sustaining productivity in the traditional system, but contemporary inputs of chemical nitrogen appear far higher than needed, and may cause pollution. An additional year of support will allow the PI to complete the dataset for two annual cycles of agroecosystem management and to process the dataset and derive nitrogen cycling indices.