Method of assessment the damage to Norway spruce stands

被引:0
|
作者
Dmyterko, Elzbieta [1 ]
Bruchwald, Arkadiusz [1 ]
机构
[1] Wydzial Lesny SGGW, PL-02766 Warsaw, Poland
来源
SYLWAN | 2007年 / 151卷 / 06期
关键词
methods of assessment the damage to stands; Norway spruce;
D O I
暂无
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Paper presents two variants of the method of assessment the damage to the Norway spruce stands that were determined on the basis of the crown development. The first one is based on the tree's defoliation, the other - on the tree's damage index TV that includes defoliation (feature A), condition of the tree-top (feature R) and tree's vitality (feature C). Mean defoliation or index W is used to determine one of the four classes of the stand damage. The accuracy of both variants was worked out and minimum number of sample trees required within assumed standard errors of assessed features. Alarming picture of Norway spruce stands in Polish Carpathians and Sudety Mountains appeared for the damaged stands prevail while there is no undamaged stands.
引用
收藏
页码:24 / 33
页数:10
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