GEOGRAPHIC-VARIATION IN SPEED OF SEED-GERMINATION IN CENTRAL OREGON PONDEROSA PINE (PINUS-PONDEROSA DOUGL EX LAWS)

被引：0
|
作者：
WEBER, JC
SORENSEN, FC
机构：
来源：
USDA FOREST SERVICE PACIFIC NORTHWEST RESEARCH STATION RESEARCH PAPER | 1992年 / 444期
关键词：
GEOGRAPHIC VARIATION; SEED GERMINATION; PONDEROSA PINE; ADAPTATION; DROUGHT; CENTRAL OREGON;
D O I：
暂无
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
Variation in speed of seed germination was investigated among ponderosa pine trees representing 225 locations in central Oregon. Results suggested that at least some of the geographic variation is related to the severity of summer drought. In general, germination speed was greater in locations with short, drought-limited growing seasons. Levels of geographic variation were highest in the region having the steepest precipitation gradients. Most of the variation occurred, however, within locations.
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页码：U1 / &
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