Рубрики:
BLACK SPRUCE
DOUGLAS-FIR
TEMPERATURE CONTROL
FOREST ECOSYSTEMS
SITKA SPRUCE
CARBON
BIOMASS
GROWTH
PRODUCTIVITY
NUTRITION
Кл.слова (ненормированные):
Larix gmelinii -- permafrost soil -- rhizosphere environment -- root system development -- Siberia
BLACK SPRUCE
DOUGLAS-FIR
TEMPERATURE CONTROL
FOREST ECOSYSTEMS
SITKA SPRUCE
CARBON
BIOMASS
GROWTH
PRODUCTIVITY
NUTRITION
Кл.слова (ненормированные):
Larix gmelinii -- permafrost soil -- rhizosphere environment -- root system development -- Siberia
Аннотация: Spatial distributions of root systems of Larix gmelinii (Rupr.) Rupr. trees were examined in two stands in central Siberia: an even-aged stand (ca. 100 yrs-old) and a mature, uneven-aged (240-280 yrs-old) stand. Five larch trees of different sizes were sampled by excavating coarse roots (diameter > 5 mm) in each stand. Dimensions and ages of all first-order lateral roots were measured. Micro-scale conditions of soil temperature and soil water suction ( each 10 cm deep) were also examined in relation to earth hummock topography (mound vs. trough) and/or ground floor vegetation types (moss vs. lichens). All larch trees developed superficial root systems, consisting of the aborted short tap root (10-40 cm in soil depth) and some well-spread lateral roots (n = 4-13). The root network of each tree was asymmetric, and its rooting area reached about four times the crown projection area. Lateral roots generally expanded into the upper soil layers of the mounds where summer soil temperature was 1-6degreesC higher than inside nearby troughs. Chronological analysis indicated that lateral root expansion started successively from lower to upper parts of each aborted tap root, and some lateral roots occurred simultaneously at several decades after tree establishment. The process of root system development was likely to be primarily linked with post-fire dynamics of rhizosphere environment of the permafrost soils.
Полный текст,
WOS,
Scopus
Держатели документа:
Forestry & Forest Prod Res Inst, Tohoku Res Ctr, Morioka, Iwate 0200123, Japan
Forestry & Forest Prod Res Inst, Kukizaki, Ibaraki 3058687, Japan
Ryukoku Univ, Fac Intercultural Commun, Otsu, Shiga 5202194, Japan
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Kajimoto, T...; Matsuura, Y...; Osawa, A...; Prokushkin, A.S.; Sofronov, M.A.; Abaimov, A.P.