Nutrient Legacies and Time Lags: Understanding Catchment Biogeochemical Responses in Anthropogenic Landscapes

养分遗产和时间滞后：了解人类景观中的流域生物地球化学反应

• 批准号: RGPIN-2015-06024
• 负责人: Basu, Nandita
• 金额: $ 2.4万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633627
• 关键词: Nutrient; Legacies; Time; Lags; Understanding

Excess nutrients associated with high levels of fertilizer application and concentrated livestock operations find their way into both ground and surface waters, leading to problems of hypoxia, aquatic toxicity and drinking water contamination. Reductions in fertilizer application or implementation of other best management practices (BMPs) have been carried out to improve water quality, but often they do not yield expected results. Such lack of response is attributed to buildups of legacy stores that can cause significant time lags between BMP implementation and water quality improvements.

与大量施肥和集中畜牧业活动有关的过量营养物进入地下和地表沃茨，导致缺氧、水生毒性和饮用水污染等问题。为改善水质，已采取减少化肥施用或实施其他最佳管理做法，但这些做法往往没有产生预期的效果。这种缺乏反应是由于遗留商店的积累，可能会导致BMP的实施和水质改善之间的显着时间滞后。