Electrical measurement of tree root absorbing surfaces by the earth impedance method:: 2.: Verification based on allometric relationships and root severing experiments

被引:57
作者
Cermak, Jan
Ulrich, Radek
Stanek, Zdenek
Koller, Jan
Aubrecht, Ludek
机构
[1] Mendel Univ Brno, Inst Forest Ecol, Brno 61300, Czech Republic
[2] Czech Tech Univ, Fac Elect Engn, Dept Phys, Prague 16627 6, Czech Republic
关键词
broadleaf and conifer species; conductometry; instrumental measurement; whole tree root systems;
D O I
10.1093/treephys/26.9.1113
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
We validated, by means of allometric relationships and root severing experiments, the modified earth impedance method developed for measuring absorbing root surfaces. For the allometric studies, a series of 350 small and large trees of six broadleaf and coniferous species in several experimental sites was examined. We found a good linear In-In fit between absorbing root surface area and basal area (or stem cross-sectional area at the root collar in seedlings) over a range of stem diameters from 0.5-55 cm. The absorbing root surface area also changed consistently with crown projected area and the root-accessed area (territory) of the tree. At the whole-tree level. absorbing root surface area reached about 70 times that of basal area and 40% of crown projected area, or roughly 1/3 of the root-accessed area in Norway spruce (in this species, the ratio was relatively larger in small trees and smaller in large trees). The absorbing root surfaces of mechanically severed parts of Norway spruce root systems changed in about the same proportions as the geometrically determined parts of the severed root systems. These results are promising and support field applications of the method in biological and ecological studies.
引用
收藏
页码:1113 / 1121
页数:9
相关论文
共 87 条
[51]   Water transport in plants obeys Murray's law [J].
McCulloh, KA ;
Sperry, JS ;
Adler, FR .
NATURE, 2003, 421 (6926) :939-942
[52]  
MCQUEEN DR, 1968, OECOLOG PLANTAR, V3, P83
[53]   RHIZOMETER - A DEVICE FOR MEASURING ROOTS OF TREE SEEDLINGS [J].
MORRISON, IK ;
ARMSON, KA .
FORESTRY CHRONICLE, 1968, 44 (05) :21-&
[54]   Instrumental methods for studies of structure and function of root systems of large trees [J].
Nadezhdina, N ;
Cermák, J .
JOURNAL OF EXPERIMENTAL BOTANY, 2003, 54 (387) :1511-1521
[55]  
NATHENSON R, 2001, TREE CARE IND, P29
[56]   On the vegetative biomass partitioning of seed plant leaves, stems, and roots [J].
Niklas, KJ ;
Enquist, BJ .
AMERICAN NATURALIST, 2002, 159 (05) :482-497
[57]   The role of soil conditions in fine root ecomorphology in Norway spruce (Picea abies (L.) Karst.) [J].
Ostonen, I ;
Lohmus, K ;
Lasn, R .
PLANT AND SOIL, 1999, 208 (02) :283-292
[58]   ROOT DISTRIBUTION IN A NORWAY SPRUCE (PICEA-ABIES (L.) KARST.) STAND SUBJECTED TO DROUGHT AND RAMMONIUM-SULFATE APPLICATION [J].
PERSSON, H ;
VONFIRCKS, Y ;
MAJDI, H ;
NILSSON, LO .
PLANT AND SOIL, 1995, 168 :161-165
[59]   Fine-root response to nitrogen supply in nitrogen manipulated Norway spruce catchment areas [J].
Persson, H ;
Ahlström, K .
FOREST ECOLOGY AND MANAGEMENT, 2002, 168 (1-3) :29-41
[60]   THE DISTRIBUTION AND PRODUCTIVITY OF FINE ROOTS IN BOREAL FORESTS [J].
PERSSON, HA .
PLANT AND SOIL, 1983, 71 (1-3) :87-101