期刊
EUROPEAN JOURNAL OF FOREST RESEARCH
卷 129, 期 6, 页码 1001-1009出版社
SPRINGER
DOI: 10.1007/s10342-010-0383-2
关键词
European beech; Norway spruce; Fine root dynamics; Fine root longevity; Soil water; Temperature
类别
资金
- German Science Foundation (DFG) [Ka941/61, 2]
Fine root dynamics in mono-specific stands of mature Fagus sylvatica L. and Picea abies Karst. was studied from December 2003 to December 2004 in a stand in Southern Germany. Minirhizotrons were used to draw between species comparisons concerning fine root (a parts per thousand currency sign1 mm) longevity and temporal patterns of fine root dynamics (growth and mortality) as related to seasonal changes in soil water content and soil temperature. In F. sylvatica, median fine root longevity from early seasonal to late-seasonal cohorts was low (77 days). Fine root dynamics scaled positively with seasonal changes in soil water and temperature indicating accelerated fine root turnover during favourable soil conditions. In contrast, fine root longevity in P. abies (273 days) was significantly higher when compared to F. sylvatica and increased from early seasonal to late-seasonal cohorts. Fine root dynamics in P. abies did not correlate with soil environmental conditions. Rather a large proportion of new fine roots occurred during the dry season in superficial soil layers. The data suggest species inherent patterns of fine root longevity and temporal patterns of fine root dynamics.
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