scholarly journals Growth and yield estimation of Chamaecyparis spp. through tree ring analysis

2013 ◽  
Vol 22 (2) ◽  
pp. 36-42 ◽  
Author(s):  
D. K. Kharal ◽  
T. Fujiwara
Keyword(s):  
Tree Ring ◽  
Radial Growth ◽  
Ring Width ◽  
Forest Products ◽  
Growth And Yield ◽  
Tree Age ◽  
Biomass Estimation ◽  
Tree Ring Analysis ◽  
Ring Density ◽  
Ring Analysis

Tree ring analysis is one of the most useful methods in volume and biomass estimation especially of the conifer trees. Ring width and ring density are important parameters in dendrochronological research. The present research was carried out with the aim of estimating the radial and volumetric growth of the Japanese Cypress trees (Chamaecyperis obstusa and C. pisifera). Destructive method was used while collecting the wood samples from the selected trees. Ring width and ring density were measured using soft X-ray densitometry method using micro-densitometer. Computer programme, developed by the Forestry and Forest Products Research Institute, Japan was used to analyze the ring with and ring density data. The average ring width of the Chamaecyparis spp. was found to be about 3.4 mm at the age of 30 years. However, two types of growth pattern were observed in the trees. Average radial growth was about 5% every year during the first 20 years of the tree age, whereas, the average radial growth was negative during the age of 20–30 years. Average density of the tree rings were increased by about 11% in each height of the trees starting from the ground. Similarly, the stem density decreased by about 3.4% annually along the radial direction from the pith.DOI: http://dx.doi.org/10.3126/banko.v22i2.9197Banko Janakari: A Journal of Forestry Information for NepalVol. 22, No. 2, 2012 November Page: 36-42 Uploaded date: 12/1/2013 

scholarly journals Analysis of carbon stock and radial growth of trees through tree ring analysis in pine forest of linga guthi in Bhaktapur, Nepal

2018 ◽  
Vol 30 ◽  
pp. 248-255
Author(s):  
Saphalta Chhukan ◽  
Siddi Bir Karmacharya ◽  
Sanu Raja Maharjan
Keyword(s):  
Tree Ring ◽  
Radial Growth ◽  
Carbon Stock ◽  
Plant Biomass ◽  
Ring Width ◽  
Measuring System ◽  
Community Forest ◽  
Pinus Roxburghii ◽  
Tree Ring Analysis ◽  
Ring Analysis

Forests are the integral to the global carbon cycle. These ecosystems sequester carbon in the plant biomass and in the soil. The study was carried out in Linga Guthi Community Forest of Bhaktapur to estimate carbon Stock and radial growth of Pinus roxburghii through tree ring analysis. A total of 32 circular plots of 250 m2 area were laid down randomly. Subplots were made for study of saplings, Litter, herbs and soil. For tree ring analysis, tree core samples were collected from different blocks of forest. Ring widths were measured using TSAP-Win Software attached to a LINTAB measuring system. For tree ring analysis, COFECHA and ARSTAN program were used. The average carbon stock of Linga Guthi Community Forest was 272.22±17.36 t/ha. Similarly, it has storage of 206.87± 4.47 t/ha AGTC, 41.37±2.19 t/ha BGTC, 23.814±1.00 t/ha SOC. The carbon sequestration rate of the forest was 2.22 Ct/ha/year. The average radial growth of pine trees in the forest was found to be 2.06 ± 0.13 mm/year. The maximum radial growth was 4.47 mm/yr. The oldest tree recorded in this forest was158 years with 58 cm diameter. However the average age of the forest was 98 years. The ring width chronology of 158 years was prepared for pine tree extending from 1854 to 2013 A.D.

Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China’s Ejina Oasis, using tree-ring analysis

Trees ◽  
2015 ◽  
Vol 31 (2) ◽  
pp. 379-392 ◽  
Author(s):  
Xiaomei Peng ◽  
Shengchun Xiao ◽  
Guodong Cheng ◽  
Honglang Xiao ◽  
Quanyan Tian ◽  
...  
Keyword(s):  
Tree Ring ◽  
Human Activity ◽  
Radial Growth ◽  
Populus Euphratica ◽  
Riparian Forests ◽  
Tree Ring Analysis ◽  
Ejina Oasis ◽  
Ring Analysis

Tree Ring Analysis of Araucaria Angustifolia in Southern Brazil: Preliminary Results

IAWA Journal ◽  
1989 ◽  
Vol 10 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Rudi A. Seitz ◽  
Markku Kanninen
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Research Station ◽  
Araucaria Angustifolia ◽  
Forest Research ◽  
Tree Ring Analysis ◽  
Preliminary Results ◽  
The Mean ◽  
Ring Analysis ◽  
The University

Tree ring analysis of Araucaria angustifolia trees grown at the forest research station Sao Joao do Triunfo of the University of Parana has been carried out.Disks were taken from 10 trees at the height of 2 m and on each disk 8 radii were used for measurement of ring width.The preliminary results indicate that there is within-tree-variation in the ring series. The mean intra-correlation coefficient for the ring widths between the radii varied between 0.57 and 0.89.A mean correlation of 0.60 for all pairs of trees was obtained indicating consistency in the index series between the trees. This made it possible to construct an average tree ring index for the stand.

scholarly journals Reconstruction of Resin Collection History of Pine Forests in Korea from Tree-Ring Dating

2020 ◽  
Vol 12 (21) ◽  
pp. 9118
Author(s):  
En-Bi Choi ◽  
Yo-Jung Kim ◽  
Jun-Hui Park ◽  
Chan-Ryul Park ◽  
Jeong-Wook Seo
Keyword(s):  
Tree Ring ◽  
Pinus Densiflora ◽  
Forest Products ◽  
Republic Of Korea ◽  
Tree Ring Analysis ◽  
Analysis Technique ◽  
Non Timber Forest Products ◽  
History Of ◽  
The Republic ◽  
Ring Analysis

Resin is one of the traditional non-timber forest products in the Republic of Korea. In order to investigate the chronological activity of resin collection, the wounds/cuts on red pines (Pinus densiflora) were dated using a tree-ring analysis technique. Additionally, the size of the trees in the resin collection years and the present conditions of the trees were investigated to verify the tree conditions and the size of wounds. Eighty-eight red pines distributed over nine sites in the Republic of Korea were selected to extract increment cores and investigate the wound size. Through the tree-ring analysis, the trees with big wounds (24.7 × 104.7 cm) made via panel hacksaw method were dated in the range 1938–1952, whereas small wounds (40.2 × 20.9 cm) made via the conventional chisel method were dated between 1956 and 1973. Moreover, the red pines thicker than 20.0 cm were the ones that were used for resin collection. Furthermore, the wounds created by the conventional chisel were healed with time, whereas the ones formed via the panel hacksaw method still required long times for healing. The large wounds had the advantage of supplying a large amount of resin, but this was temporary. On the other hand, the smaller wounds formed via the traditional chisel method could generate resin for a longer time and heal faster.

scholarly journals Selected properties of Blue spruce wood from non-forest land

2009 ◽  
Vol 57 (2) ◽  
pp. 37-44
Author(s):  
Vladimír Gryc ◽  
Hanuš Vavrčík ◽  
Ondřej Kotalík
Keyword(s):  
Compressive Strength ◽  
Tree Ring ◽  
Wood Density ◽  
Ring Width ◽  
Wood Properties ◽  
Volumetric Shrinkage ◽  
Tree Ring Width ◽  
Tree Ring Analysis ◽  
Blue Spruce ◽  
Ring Analysis

The aim of this work was to carry out a tree-ring analysis, to determine density, shrinkage and compressive strength parallel to the grain of Blue spruce (Picea pungens Engelm.) wood. Results of this work were specific due to the non-forest origin of the sample material that was from two solitaire trees. Tree ring analysis (determination of tree ring width and portion of latewood) was carried out on the transverse section of a stem that was taken at height of 0.3 m from the tree base. Wood properties were tested according to Czech technical standards.Trees showed wide tree rings (5.65 mm) with a small portion of latewood (12.55 %). Oven dry wood density was 371.66 kg . m−3, overall volumetric shrinkage was 9.12 % and compressive strength parallel to the grain was 42.10 MPa. Due to the low age of trees results are valid for juvenile wood.Wood properties were examined along the stem radius. Tree ring width was increasing to the age of 12th year subsequently it was constant. Tree ring width was constant along the entire stem radius. Wood density, overall volumetric shrinkage and compressive strength parallel to the grain were increasing in the direction from pith to bark.

scholarly journals A novel computer-aided tree-ring analysis software (CATS): oak earlywood vessel size reveals a clear spring heat sum response

Trees ◽  
2017 ◽  
Vol 31 (5) ◽  
pp. 1683-1695 ◽  
Author(s):  
Alexander Land ◽  
Matthias Wehr ◽  
Kai-Uwe Roelfs ◽  
Simon Epkes ◽  
Daniel Reichle ◽  
...  
Keyword(s):  
Tree Ring ◽  
Analysis Software ◽  
Tree Ring Analysis ◽  
Vessel Size ◽  
Computer Aided ◽  
Earlywood Vessel ◽  
Ring Analysis

scholarly journals Responses of radial growth, wood density and fiber traits to planting space in poplar plantations at a lowland site

2021 ◽  
Author(s):  
Yanhua Zhang ◽  
Shengzuo Fang ◽  
Ye Tian ◽  
Linlin Wang ◽  
Yi Lv
Keyword(s):  
Tree Ring ◽  
Radial Growth ◽  
Pearson Correlation ◽  
Wood Fiber ◽  
Negative Relationship ◽  
Basic Density ◽  
Ring Width ◽  
Tree Ring Width ◽  
Wood Basic Density ◽  
Fiber Traits

AbstractPoplar is raw material for various panel, paper and fiber products. The 12 sample trees of clone Nanlin-895 from four spacings were destructively harvested after thirteen growing seasons to assess the influence of spacing on radial growth and wood properties. Spacing significantly affected tree-ring width and wood basic density (p < 0.05) but not fiber traits. The highest diameter and wood basic density at breast height (1.3 m) was in 6 m × 6 m and 3 m × 8 m spacings, respectively. However, no significant differences in tree-ring width, wood basic density and fiber traits were observed among the four sampling directions in discs taken at 1.3 m for each spacing. Growth rings from the pith and tree heights had significant effects on wood basic density and fiber anatomical characteristics, highlighting obvious temporal-spatial variations. Pearson correlation analysis showed a significantly negative relationship of tree-ring width to wood basic density, fiber length and fiber width, but a significantly positive relationship to hemicellulose. There was no relationship with cellulose and lignin contents. Based on a comprehensive assessment by the TOPSIS method, the 6 m × 6 m spacing is recommended for producing wood fiber at similar sites in the future.

scholarly journals Radiation densitometry in tree-ring analysis: a review and procedure manual

1985 ◽  
Author(s):  
M.L. Parker ◽  
F.G. Taylor ◽  
T.W. Doyle ◽  
B.E. Foster ◽  
C. Cooper ◽  
...  
Keyword(s):  
Tree Ring ◽  
Tree Ring Analysis ◽  
Ring Analysis
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