Estimating Douglas-fir fine root biomass and production from living bark and starch

1985 ◽  
Vol 15 (1) ◽  
pp. 177-179 ◽  
Author(s):  
K. A. Vogt ◽  
D. J. Vogt ◽  
E. E. Moore ◽  
W. Littke ◽  
C. C. Grier ◽  
...  
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Starch Content ◽  
Wide Band ◽  
Fine Root Biomass ◽  
Douglas Fir ◽  
Breast Height ◽  
Indirect Technique

A potential indirect technique for determining fine root biomass and production is reported for Douglas-fir. Present data show a direct correlation between the starch content of a 1 cm wide band of living bark at breast height per hectare and fine root biomass per hectare (r2 = 0.85).

Conifer and Angiosperm Fine-Root Biomass in Relation to Stand Age and Site Productivity in Douglas-Fir Forests

1987 ◽  
Vol 75 (3) ◽  
pp. 857 ◽  
Author(s):  
Kristiina A. Vogt ◽  
Daniel J. Vogt ◽  
Erin E. Moore ◽  
Babatunde A. Fatuga ◽  
Mark R. Redlin ◽  
...  
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Douglas Fir ◽  
Stand Age ◽  
Site Productivity

scholarly journals Root biomass and root fractal analyses of an open Eucalyptus forest in a savanna of north Australia

2002 ◽  
Vol 50 (1) ◽  
pp. 31 ◽  
Author(s):  
D. Eamus ◽  
X. Chen ◽  
G. Kelley ◽  
L. B. Hutley
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Root Diameter ◽  
Above Ground Biomass ◽  
Breast Height ◽  
Ground Biomass ◽  
Fractal Analyses ◽  
Below Ground ◽  
Tree Stem

Below-ground biomass of a Eucalyptus savanna forest was estimated following trenching to depths of 2 m around 16 mature trees in a tropical savanna of north Australia. Correlations among below-ground and various components of above-ground biomass were also investigated. In addition, root morphology was investigated by fractal analyses and a determination of an index of shallow-rootedness was undertaken. Total root biomass was 38.4 t ha–1, including 1 t ha–1 of fine roots. About 77–90% of total root biomass was found in the upper 0.5 m of soil. While fine-root biomass density was approximately constant (0.1 kg m–3) in the top soil, irrespective of distance from a tree stem, coarse-root biomass showed large variation with distance from the tree stem. Significant positive correlations among total root biomass, total above-ground biomass, diameter at breast height, leaf biomass and leaf area were obtained. It is likely that total root biomass can be reasonably accurately estimated from aboveground biomass and fine-root biomass from tree leaf area. We present equations that allow the prediction of belowground biomass from above-ground measures of tree size. Root morphology of two evergreen and two deciduous species was compared by the use of three parameters. These were the fractal dimension (d), which describes root system complexity; a proportionality factor (α), which is the ratio of the cross-sectional area before and after branching; and two indices of shallow-rootedness (ISR). Roots were found to be amenable to fractal analyses. The proportionality factor was independent of root diameter (Dr) at any branching level in all tree species examined, indicating that branching patterns were similar across all root sizes. The fractal dimension (d) ranged from 1.15 to 1.36, indicating a relatively simple root structure. Mean d was significantly different between E. tetrodonta (evergreen) and T. ferdinandiana (deciduous); however, no significant differences were found among other pairs of species. Terminalia ferdinandiana had the highest ISR, while Planchonia careya (deciduous) had the lowest. In addition, differences in ISR between P. careya and the other three species were significant, but not significant among E. miniata, E. tetrodonta and T. ferdinandiana. There were clear relationships among above-ground tree stem diameter at breast height, stem base diameter, and horizontal and vertical proximal root diameter. By the use of mean values of and stem diameter, we estimated the total crosssectional area of root and root diameter-class distribution for each species studied.

Conifer fine root and mycorrhizal root biomass within the forest floors of Douglas-fir stands of different ages and site productivities

1983 ◽  
Vol 13 (3) ◽  
pp. 429-437 ◽  
Author(s):  
Kristiina A. Vogt ◽  
Erin E. Moore ◽  
Daniel J. Vogt ◽  
Mark J. Redlin ◽  
Robert L. Edmonds
Keyword(s):  
Mycorrhizal Fungi ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Douglas Fir ◽  
Root Tips ◽  
Mycorrhizal Root ◽  
Mycorrhizal Roots ◽  
Forest Floors ◽  
Crown Closure

Live and dead conifer fine root (≤2 mm) and mycorrhizal root biomasses were determined in the forest floors of 16 stands of Douglas-fir (Pseudotsugamenziesii (Dougl.) Forbes) of low (IV) or high (II) productivity. The maximum biomass of both live conifer and mycorrhizal root biomass occurred at canopy closure in site II and IV stands. After crown closure this biomass decreased significantly in site II but not in site IV stands. During and following crown closure, site IV stands generally had a significantly higher live conifer root biomass than site II stands. Only in the 65- to 75- and 150- to 163-year age groupings of stands was a significantly higher live mycorrhizal root biomass measured in site IV than in site II stands. The proportion of dead to total conifer fine root biomass fluctuated from 13 to 56% in site II stands and from 26 to 76% in site IV stands. The percentage of total mycorrhizal roots that were dead fluctuated from 25 to 57% in site II stands and from 19 to 76% in site IV stands. Generally the highest percentage of live root tips infected by mycorrhizal fungi occurred in the 45- and 46-year-old site II stands and in the 33-, 49-, 67-, and 69-year-old site IV stands.

Effects of thinning on fine root biomass and carbon storage of subalpine Picea asperata plantation in Western Sichuan Province, China

2013 ◽  
Vol 36 (7) ◽  
pp. 645-654 ◽  
Author(s):  
Yun-Ke LIU ◽  
Chuan FAN ◽  
Xian-Wei LI ◽  
Yin-Hua LING ◽  
Yi-Gui ZHOU ◽  
...  
Keyword(s):  
Carbon Storage ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Sichuan Province ◽  
Western Sichuan ◽  
Picea Asperata

scholarly journals Fine root biomass and morphology in a temperate forest are influenced more by the nitrogen treatment approach than the rate

2021 ◽  
Vol 130 ◽  
pp. 108031
Author(s):  
Wen Li ◽  
Yifei Shi ◽  
Dandan Zhu ◽  
Wenqian Wang ◽  
Haowei Liu ◽  
...  
Keyword(s):  
Root Biomass ◽  
Temperate Forest ◽  
Fine Root ◽  
Treatment Approach ◽  
Fine Root Biomass ◽  
Nitrogen Treatment

scholarly journals Effect of earthworms on mycorrhization, root morphology and biomass of silver fir seedlings inoculated with black summer truffle (Tuber aestivum Vittad.)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tina Unuk Nahberger ◽  
Gian Maria Niccolò Benucci ◽  
Hojka Kraigher ◽  
Tine Grebenc
Keyword(s):  
Root System ◽  
Root Biomass ◽  
Fine Root ◽  
Abies Alba ◽  
Fine Root Biomass ◽  
Root Tip ◽  
Silver Fir ◽  
Tuber Aestivum ◽  
Root Tips ◽  
Root Parameters

AbstractSpecies of the genus Tuber have gained a lot of attention in recent decades due to their aromatic hypogenous fruitbodies, which can bring high prices on the market. The tendency in truffle production is to infect oak, hazel, beech, etc. in greenhouse conditions. We aimed to show whether silver fir (Abies alba Mill.) can be an appropriate host partner for commercial mycorrhization with truffles, and how earthworms in the inoculation substrate would affect the mycorrhization dynamics. Silver fir seedlings inoculated with Tuber. aestivum were analyzed for root system parameters and mycorrhization, how earthworms affect the bare root system, and if mycorrhization parameters change when earthworms are added to the inoculation substrate. Seedlings were analyzed 6 and 12 months after spore inoculation. Mycorrhization with or without earthworms revealed contrasting effects on fine root biomass and morphology of silver fir seedlings. Only a few of the assessed fine root parameters showed statistically significant response, namely higher fine root biomass and fine root tip density in inoculated seedlings without earthworms 6 months after inoculation, lower fine root tip density when earthworms were added, the specific root tip density increased in inoculated seedlings without earthworms 12 months after inoculation, and general negative effect of earthworm on branching density. Silver fir was confirmed as a suitable host partner for commercial mycorrhization with truffles, with 6% and 35% mycorrhization 6 months after inoculation and between 36% and 55% mycorrhization 12 months after inoculation. The effect of earthworms on mycorrhization of silver fir with Tuber aestivum was positive only after 6 months of mycorrhization, while this effect disappeared and turned insignificantly negative after 12 months due to the secondary effect of grazing on ectomycorrhizal root tips.

scholarly journals Biotic and Abiotic Determinants of Soil Organic Matter Stock and Fine Root Biomass in Mountain Area Temperate Forests—Examples from Cambisols under European Beech, Norway Spruce and Silver Fir (Carpathians, Central Europe)

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 823
Author(s):  
Anna Zielonka ◽  
Marek Drewnik ◽  
Łukasz Musielok ◽  
Marcin K. Dyderski ◽  
Dariusz Struzik ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Norway Spruce ◽  
Root Biomass ◽  
Fine Root ◽  
Stand Density ◽  
European Beech ◽  
Fine Root Biomass ◽  
Silver Fir ◽  
Beech Forests

Forest ecosystems significantly contribute to the global organic carbon (OC) pool, exhibiting high spatial heterogeneity in this respect. Some of the components of the OC pool in a forest (woody aboveground biomass (wAGB), coarse root biomass (CRB)) can be relatively easily estimated using readily available data from land observation and forest inventories, while some of the components of the OC pool are very difficult to determine (fine root biomass (FRB) and soil organic matter (SOM) stock). The main objectives of our study were to: (1) estimate the SOM stock; (2) estimate FRB; and (3) assess the relationship between both biotic (wAGB, forest age, foliage, stand density) and abiotic factors (climatic conditions, relief, soil properties) and SOM stocks and FRB in temperate forests in the Western Carpathians consisting of European beech, Norway spruce, and silver fir (32 forest inventory plots in total). We uncovered the highest wAGB in beech forests and highest SOM stocks under beech forest. FRB was the highest under fir forest. We noted a considerable impact of stand density on SOM stocks, particularly in beech and spruce forests. FRB content was mostly impacted by stand density only in beech forests without any discernible effects on other forest characteristics. We discovered significant impacts of relief-dependent factors and SOM stocks at all the studied sites. Our biomass and carbon models informed by more detailed environmental data led to reduce the uncertainty in over- and underestimation in Cambisols under beech, spruce, and fir forests for mountain temperate forest carbon pools.

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