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首页> 外文期刊>Journal of Forestry >Efficiencies of forestry best management practices for reducing sediment and nutrient losses in the eastern United States.
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Efficiencies of forestry best management practices for reducing sediment and nutrient losses in the eastern United States.

机译：林业最佳管理方法在减少美国东部沉积物和养分流失方面的效率。

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摘要

Quantifying the effects of forestry best management practices (BMPs) on sediment and nutrient loads is a critical need. Through an exhaustive literature search, three paired forested watershed studies in the eastern United States were found that permitted the calculation of BMP efficiencies - the percent reduction in sediment or nutrients achieved by BMPs. For sediment, BMP efficiencies ranged from 53 to 94% during harvest and up to 1 year after harvesting. For nutrients, BMP efficiencies were higher for total nitrogen (60-80%) and phosphorus (85-86%), which included particulate and sediment-bound forms, than for nitrate-nitrogen (12%), which occurs primarily in the dissolved phase. Results indicate forestry BMPs can significantly reduce sediment and nutrient loads; however, BMPs appear to be more effective at reducing pollutants associated with surface runoff than with subsurface flow.
机译：迫切需要量化林业最佳管理实践（BMP）对沉积物和养分含量的影响。通过详尽的文献搜索，在美国东部进行了三对成对的森林流域研究，这些研究可以计算BMP效率-BMP实现的沉积物或养分减少百分比。对于沉积物，BMP的效率在收获期间为53％至94％，在收获后长达1年。对于养分，总氮（60-80％）和磷（85-86％）的BMP效率更高，其中包括颗粒和沉积物结合形式，而硝酸盐氮（12％）则主要发生在溶解态相。结果表明，林业BMPs可以显着减少沉积物和养分含量。然而，BMP似乎在减少与地表径流有关的污染物方面比在地下流动方面更有效。

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