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Reactive Polyphenols and Dissolved Nutrients in a Nitrogen-Limited Headwater Catchment in Western Oregon,USA

机译:美国西俄勒冈州氮限量椎间尘集水中的反应性多酚和溶解营养素

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Both the quantity and quality of dissolved organic matter(DOM)change dramatically as it moves from the soil to the stream.In N limited systems,inorganic N losses are very low,but dissolved organic nitrogen(DON)losses may still be substantial(1,2).The relationship between DON and polyphenols in soil solutions has been established(3,4),but little work has been done linking the reactive polyphenols and nutrient chemistry of soil water to stream water.Reactive polyphenols(RPP),which include but are not limited to tannins,sequester nitrogenous compounds into resistant protein-polyphenol complexes(5).DOM in N limited systems may contain a high proportion RPP which bind to DON,thus perpetuating the N limitation of the system.In this preliminary study conducted in an N-limited headwater catchment in the Western Cascades,an approach is presented to quantify and compare reactive polyphenols and nutrient dynamics over the first storm event in autumn 2007.
机译:溶解有机物(DOM)的数量和质量均在从土壤中移动到流中的急剧变化。在N有限的系统中,无机N损失非常低,但溶解的有机氮(Don)损失仍然可以很大(1 ,2)。已经建立了土壤溶液中的唐和多酚之间的关系(3,4),但是在将土壤水的反应性多酚和营养化学与流水中的营养化学联系起来的工作。反应性多酚(RPP),包括但不限于单宁,含氮化合物含氮化合物到抗性蛋白 - 多酚络合物(5)中,在N个限制系统中可能含有高比例的RPP,从而使系统的N局限性延伸。在该初步研究中进行了局限性。在这种初步研究中延伸了N局限在西部级联的一个有限的椎间口集水区中,提出了一种方法来量化和比较2007年秋季的第一场风暴事件上的反应性多酚和营养动态。

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