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: N-P ratio Ïà¹Ø....
: By  xcm84 ·¢±íÓÚ 2007-10-28 9:08:00
: Biomass allocation and growth rates in Pinus sylvestris are interactively mo
: dified by nitrogen and phosphorus availabilities and by tree size and age
: Angelika Portsmuth, ¨¹lo Niinemets, Laimi Truus, and Margus Pensa
: Can. J. For. Res./Rev. can. rech. for. 35(10): 2346-2359 (2005)
: The overall decrease of growth in larger trees resulted from their lower lea
: f-area ratio (LAR) and  leaf dry mass ratio (FL). Increases in size further
: led to a lower dry mass weighted average nitrogen (NW)   but higher phosphor
: us (PW) . We conclude that optimum productivity at a given NW requires a ce
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