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 Fine Root and Soil Nitrogen Dynamics during Stand Development Following Shifting Agriculture in Northeast India

Forests ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1236
Author(s):  
Dipendra Singha ◽  
Francis Q. Brearley ◽  
Shri Kant Tripathi
Keyword(s):  
N Mineralization ◽  
Fine Roots ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Northeast India ◽  
Stand Age ◽  
N Dynamics ◽  
Available N ◽  
Shifting Agriculture

Nitrogen (N) dynamics during changes in land use patterns in tropical forests may profoundly affect fine root dynamics and nutrient cycling processes. Variations in fine root biomass and soil N dynamics were assessed in developing stands of increasing ages following shifting agriculture in Mizoram, Northeast India, and comparisons were made with a natural forest stand. Concentrations of soil available N (NH4-N and NO3-N) and the proportion of NH4-N in total available N increased with stand age. The N-mineralization rate also increased with stand age whilst the proportion of nitrification relative to ammonification declined during succession. Fine root biomass and N-mineralization increased, and available N decreased during the monsoon season while this pattern was reversed during the winter season. A greater proportion of fine roots were <0.5 mm diameter in the younger sites, and turnover of fine roots was more rapid in the developing stands compared to the natural forest. Fine root biomass was correlated positively with N-mineralization rate and soil water content. Thus, it can be concluded that the fine root growth was aided by rapid N-mineralization, and both fine root growth and N-mineralization increase as stands redevelop following shifting cultivation disturbance.

scholarly journals Fine root biomass and production in Scots pine stands in relation to stand age

2001 ◽  
Vol 21 (2-3) ◽  
pp. 193-198 ◽  
Author(s):  
K. Makkonen ◽  
H.-S. Helmisaari
Keyword(s):  
Scots Pine ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Stand Age ◽  
Pine Stands ◽  
Scots Pine Stands

Effect of stand age on fine-root biomass and biomass distribution in three European forest chronosequences

2005 ◽  
Vol 35 (7) ◽  
pp. 1617-1625 ◽  
Author(s):  
A Claus ◽  
E George
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Stand Age ◽  
Biomass Distribution ◽  
Age Classes ◽  
Soil Layers ◽  
Top Soil ◽  
European Forest ◽  
Mature Stands

Fine-root (<2 mm) biomass and biomass distribution were determined in different age-classes of three European forest chronosequences dominated by Fagus sylvatica L., Picea abies (L.) Karst., and Quercus cerris L., respectively. Root samples were taken with the auger method. There was a clear effect of stand age on standing fine-root biomass, with the highest fine-root biomass in adult but not mature stands. The vertical fine-root biomass distribution showed, at all sites, high densities of roots in the top soil layers and with depth a gradual decrease of fine-root biomass density. The difference in total fine-root biomass between the different age-classes appeared to be due to differences in the top soil layers. Fine-root biomass in the lower soil layers was less variable along the life cycle of the forests. Only in very young stands, specific root length of fine roots was higher than in the other age-classes. The present data together with other published values suggest that fine-root biomass in tree stands develops in three phases: rapid increase after a clear-cut harvest up to a maximum of fine-root biomass; a decrease during maturation of the stand; and a steady-state in mature stands.

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.

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).

scholarly journals Effect of Stand Age on Fine Root Biomass, Production and Morphology in Chinese Fir Plantations in Subtropical China

2018 ◽  
Vol 10 (7) ◽  
pp. 2280 ◽  
Author(s):  
Yameng Pei ◽  
Pifeng Lei ◽  
Wenhua Xiang ◽  
Shuai Ouyang ◽  
Yiye Xu
Keyword(s):  
Biomass Production ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Chinese Fir ◽  
Stand Age ◽  
Subtropical China
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