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

scholarly journals Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands

2007 ◽  
Vol 27 (10) ◽  
pp. 1493-1504 ◽  
Author(s):  
H.-S. Helmisaari ◽  
J. Derome ◽  
P. Nojd ◽  
M. Kukkola
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Pine Stands ◽  
Scots Pine Stands ◽  
Stand Characteristics

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 LAI estimation by direct and indirect methods in Scots pine stands in Northern Steppe of Ukraine

2018 ◽  
Vol 64 (No. 12) ◽  
pp. 514-522
Author(s):  
Viktoriia Lovynska ◽  
Petro Lakyda ◽  
Svitlana Sytnyk ◽  
Mykola Kharytonov ◽  
Iryna Piestova
Keyword(s):  
Scots Pine ◽  
Indirect Method ◽  
Direct Method ◽  
Coefficient Of Determination ◽  
Tree Level ◽  
Stand Age ◽  
Area Index ◽  
Crown Diameter ◽  
Pine Stands ◽  
Scots Pine Stands

Leaf area index (LAI) of Scots pine (Pinus sylvestris Linnaeus) in the Northern Steppe of Ukraine was estimated. LAI estimated directly (LAI d, destructive sampling) was compared with LAI determined by digital hemispherical photography (indirect method, LAI id) in Scots pine stands. The studies to determine LAI were performed in pine stands of the age ranging from 57 to 87 years. The high coefficient of determination between needle weight and crown diameter as dependent variables and stand age as an independent variable was found at the tree level. LAI values of the stands estimated by the direct method were higher than those obtained by the indirect method on average by 8.8%. The results obtained by both methods were used for LAI determination from allometric relationships with tree mensuration parameters and stand biometric characteristics. There was a more significant relationship between LAI id values and tree crown diameter, basal area of stands as independent variables.

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
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