Effects of beech bark disease on the growth of American beech (Fagus grandifolia).
Effects of beech bark disease on the growth of American beech (Fagus grandifolia).
复制标题
山毛榉树皮病对美国山毛榉（Fagus grandifolia）生长的影响。
DOI：
--
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
D. Peart
中科院分区：
文献类型：
--
作者：
David G. Gavin;D. Peart
We studied radial growth reduction in American beech (Fagusgrandifolia Ehrh.) in relation to the level of defect induced by beech bark disease, in second-growth and old-growth northern hardwoods stands in New Hampshire. In the second-growth stand at Moose Mountain (n = 243 trees), 1989–1990 radial growth declined significantly with increasing severity of external symptoms. The severity of external symptoms increased significantly with DBH. To examine temporal trends, internal defect induced by the disease was quantified as the percentage of growth sheath cankered in each year, by cross-sectioning a subsample of 40 trees. Internal defect first appeared in 1950, increased through 1969, then declined until a major pulse of infection in the period 1983–1987. Sectioned trees were divided into infection classes based on a cumulative measure of internal defect. Growth of severely infected trees first fell below that of uninfected trees in 1965, and was consistently lower after 1972. The growth ratio of severely ...
