Stem-growth response of Pinus sylvestris and Picea abies to nitrogen fertilization as related to needle nitrogen concentration

被引：16

作者：

Sikstrom, U ^{[1
]}

Nohrstedt, HO ^{[1
]}

Pettersson, F ^{[1
]}

Jacobson, S ^{[1
]}

机构：

[1] Forestry Res Inst Sweden, S-75183 Uppsala, Sweden

来源：

TREES-STRUCTURE AND FUNCTION | 1998年 / 12卷 / 04期

关键词：

N-saturation; foliar-N threshold;

D O I：

10.1007/s004680050142

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Responses of stem-volume growth to N application were evaluated in relation to foliar N concentrations. Data from N-fertilization experiments in 28 Pious sylvestris stands and 21 Picea abies stands were used. Relative stem-growth responses were negatively related to concentrations of N in current-year needles of unfertilized trees. There appeared to be a threshold value of 15-16 mg (g DM)(-1) N in current-year needles, above which N-application is unlikely to stimulate growth. However, relations were nonsignificant between N concentrations in current-year needles and the absolute stem-growth response [dm(3) ha(-1) (5 years)(-1)]. The indicated threshold values are discussed in relation to other variables reflecting the N richness of the environment.

引用

页码：208 / 214

页数：7

共 50 条

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[2]

BRAEKKE FH, 1994, AKTUELT FRA SKOGFORS, V15

[3]

Dijk H.F.G., 1988, PHYSIOL PLANTARUM, V73, P494

[4] FREE AMINO-ACID-CONCENTRATIONS IN NEEDLES OF NORWAY SPRUCE AND SCOTS PINE TREES ON DIFFERENT SITES IN AREAS WITH 2 LEVELS OF NITROGEN DEPOSITION [J].