N2-fixation by Sitka alder in a young lodgepole pine stand in central interior British Columbia, Canada

被引：20

作者：

Sanborn, P

Preston, C

Brockley, R

机构：

[1] Minist Forests, Prince George, BC V2L 3H9, Canada

[2] Canadian Forest Serv, Victoria, BC V8Z 1M5, Canada

[3] Minst Forests, Kalamala Res Stn, Vernon, BC V1B 2C7, Canada

来源：

FOREST ECOLOGY AND MANAGEMENT | 2002年 / 167卷 / 1-3期

关键词：

alder; litterfall; lodgepole pine; N-2-fixation;

D O I：

10.1016/S0378-1127(01)00695-8

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Annual N-2-fixation by Sitka alder (Alnus viridis (Chaix) DC. ssp. sinuata (Regel) A.&D. Love) was estimated at 1015 kg N ha(-1) over three growing seasons in a young lodgepole pine (Pinus contorta Dougl. ex Loud.) stand in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia (BC), Canada. Unlike the ambiguous evidence provided by 15 N natural abundance, the isotope dilution method indicated that >90% of the N in new alder tissues was derived from the atmosphere. Despite low light levels (18.1% of open sky values), alders growing under a mature lodgepole pine canopy (>150-year-old) obtained a similarly high proportion of their N requirements by N-2-fixation. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：223 / 231

页数：9

共 31 条

[1]

[Anonymous], LAND MANAGEMENT HDB

[2]

[Anonymous], 266 FRDA BC MIN FOR

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