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פותח על ידי קלירמאש פתרונות בע"מ -
Root biomass of pinus radiata d. Don
Year:
1978
Source of publication :
South African Forestry Journal
Authors :
חת, דן
;
.
Volume :
107
Co-Authors:
Heth, D., Forestry Division, Agricultural Research Organization (A.R.O.), Ilanot, Doar Na Lev, Hasharon, Israel
Donald, D.G.M., University of Stellenbosch, South Africa
Facilitators :
From page:
60
To page:
70
(
Total pages:
11
)
Abstract:
Root biomass of 20 trees of Pinus radiata at Jonkershoek State forest. Cape Province, R.S.A., was measured. Oven-dry weight of 10 of these trees, 27 year old (“young” trees), ranged between 66,9 kg and 231,0 kg. Oven-dry weight of the other 10 trees measured, 36–39 year old (“old” trees) ranged between 149,2 kg and 491,4 kg. Oven-dry weight (kg) of root biomass of the “old” trees (Y) regressed over DBH over-bark (x) in ern, gave Y = 11,934 X – 267,207 with r2 = 0,856, while oven-dry root weight (Y) in kg of the same trees, regressed over diameter (ern) under bark of the stump, 20 cm above the ground, gave: Y = 12,130 X – 267,633 with r2 = 0,931. Thus, it is possible to evaluate root biomass of P. radiata of similar age and site conditions, by an above-ground parameter such as stump diameter or DBH. Root mass was related to basal diameter, to evaluate missing roots. This also provided data for evaluating fine root (<5 mm diameter) weight. Quantity and percentage of total fine roots of P. radiata, decreased from the “young” stand to the “old” one. Distribution of the fine roots in this study showed that the highest concentrations and weights occurred in two places: in the upper 33 ern of the soil and just under the butt at 100–160 ern depth. Fine root concentration did not differ with distance from tree boles within the stand but that of large roots decreased with increasing distance from the tree bole. © 1978 Taylor & Francis Group, LLC.
Note:
Related Files :
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More details
DOI :
10.1080/20702620.1978.10433507
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24726
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:09
Scientific Publication
Root biomass of pinus radiata d. Don
107
Heth, D., Forestry Division, Agricultural Research Organization (A.R.O.), Ilanot, Doar Na Lev, Hasharon, Israel
Donald, D.G.M., University of Stellenbosch, South Africa
Root biomass of pinus radiata d. Don
Root biomass of 20 trees of Pinus radiata at Jonkershoek State forest. Cape Province, R.S.A., was measured. Oven-dry weight of 10 of these trees, 27 year old (“young” trees), ranged between 66,9 kg and 231,0 kg. Oven-dry weight of the other 10 trees measured, 36–39 year old (“old” trees) ranged between 149,2 kg and 491,4 kg. Oven-dry weight (kg) of root biomass of the “old” trees (Y) regressed over DBH over-bark (x) in ern, gave Y = 11,934 X – 267,207 with r2 = 0,856, while oven-dry root weight (Y) in kg of the same trees, regressed over diameter (ern) under bark of the stump, 20 cm above the ground, gave: Y = 12,130 X – 267,633 with r2 = 0,931. Thus, it is possible to evaluate root biomass of P. radiata of similar age and site conditions, by an above-ground parameter such as stump diameter or DBH. Root mass was related to basal diameter, to evaluate missing roots. This also provided data for evaluating fine root (<5 mm diameter) weight. Quantity and percentage of total fine roots of P. radiata, decreased from the “young” stand to the “old” one. Distribution of the fine roots in this study showed that the highest concentrations and weights occurred in two places: in the upper 33 ern of the soil and just under the butt at 100–160 ern depth. Fine root concentration did not differ with distance from tree boles within the stand but that of large roots decreased with increasing distance from the tree bole. © 1978 Taylor & Francis Group, LLC.
Scientific Publication
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