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- W2062474887 abstract "Little is known about the N uptake abilities of competitor species and planted seedlings in the boreal forest. The objective of this study was to determine the MichaelisMenten kinetic parameters of NH 4 + and NO 3 for white spruce (Picea glauca (Moench) Voss) and jack pine (Pinus banksiana Lamb.) seedlings, and three competitive common boreal forest early successional species: aspen (Populus tremuloides Michx.), fireweed (Epilobium angustifolium L.), and cala magrostis (Calamagrostis canadensis (Michx.) Beauv.). Uptake kinetics were measured in hydroponic cultures and expressed as maximum uptake (I max ) and ion affinity (K m ). The ranking of I max values (pmol·cm -2 ·s 1 ) for NH 4 + uptake was calamagrostis (84.6), fireweed (58.1), white spruce (20.7), aspen (12.5), and jack pine (10.9), and for NO 3 uptake was calamagrostis (17.7), fireweed (12.5), aspen (5.8), white spruce (4.5), and jack pine (2.1). The ranking of K m values (µM) for NH 4 + uptake was calamagrostis (125.9), fireweed (163.8), aspen (205.7), white spruce (217.1), and jack pine (270.5), and for NO 3 uptake was calamagrostis (229.9), fireweed (274.6), aspen (336.5), white spruce (344.5), and jack pine (350.5). Calamagrostis exhibited the greatest uptake rates and affinity for NH 4 + and NO 3 , suggesting that silviculture practices that specifically reduce establishment of this grass should benefit the growth of planted seedlings." @default.
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- W2062474887 date "2003-01-01" @default.
- W2062474887 modified "2023-09-27" @default.
- W2062474887 title "Nitrogen uptake characteristics for roots of conifer seedlings and common boreal forest competitor species" @default.
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- W2062474887 doi "https://doi.org/10.1139/x02-169" @default.
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