scholarly journals Nutrients in the aboveground biomass of substitute tree species stand with respect to thinning – blue spruce (Picea pungens Engelm.)

2008 ◽  
Vol 54 (No. 3) ◽  
pp. 85-91
Author(s):  
M. Slodičák ◽  
J. Novák
Keyword(s):  
Aboveground Biomass ◽  
Basal Area ◽  
Stem Bark ◽  
Total Biomass ◽  
Game Management ◽  
Vegetation Zone ◽  
Stem Wood ◽  
Blue Spruce ◽  
Picea Pungens ◽  
Biomass Quantification

The present paper is the first contribution from the biomass quantification series which is realized by Forestry and Game Management Research Institute in the Krušné hory Mts. (Northern Bohemia). This study is aimed at blue spruce substitute stands. Research was done within the blue spruce experiment Fláje II in the Krušné hory Mts. (800 m above sea level in the spruce forest vegetation zone, acidic category). Results showed that the aboveground biomass of the investigated substitute blue spruce stand without thinning amounted to approximately 56 thousand kg of dry matter per ha at the age of 22 years. Wood and bark of branches are the most important parts of the aboveground biomass (ca 40%). Needles and stem wood accounted for approximately 26 and 28% and stem bark only for 6%. At the age of 22 years, the investigated substitute blue spruce stand accumulated: N – 336 kg, P – 28 kg, K – 138 kg, Ca – 159 kg, Mg – 28 kg per hectare. Thinning with the consequent removal of aboveground biomass (54% of trees, 40% of basal area at the age of 16 years) represented a loss of ca 8.7 thousand kg/ha of total biomass, which contained 53 kg of N, 5 kg of P, 22 kg of K, 26 kg of Ca and 4 kg of Mg. The removal of biomass in areas previously degraded by acid deposition may result in the deficiency of Ca and Mg because of their low content in forest soil. On the other hand, thinning supported the faster growth of trees left after thinning and consequently faster biomass and nutrient accumulation.

scholarly journals Effects of Fertilization on Biomass and Macronutrient Content of Eucalyptus urophylla S.T. Blake in Arenized Soil of Pampa Biome

2019 ◽  
pp. 1-10
Author(s):  
Huan Pablo de Souza ◽  
Mauro Valdir Schumacher ◽  
Aline Aparecida Ludvichak ◽  
Dione Richer Momolli ◽  
Claudiney Do Couto Guimarães ◽  
...  
Keyword(s):  
Biomass Accumulation ◽  
Stem Bark ◽  
Total Biomass ◽  
Eucalyptus Urophylla ◽  
Stem Wood ◽  
Randomized Design ◽  
Pampa Biome ◽  
Biomass Determination ◽  
To Receive

The objective of this study was to quantify the biomass and the macronutrient stock in an experiment of fertilization with Eucalyptus urophylla, planted in arenized soil at 12 months-old, in Rio Grande do Sul, Brazil. The experiment had a completely randomized design with five treatments (T1, T2, T3, T4 and T5) with three replications. The treatments T2, T3, T4 and T5, received increasing doses of triple superphosphate. On the other hand, the T1 treatment was the only one to receive natural phosphate in planting. For the determination of the biomass, fifteen trees were felled and separated in the following components: leaves, branches, stem bark, stem wood and roots. Samples of the components were collected and transported to the laboratory for biomass determination and chemical analysis. The total biomass varied between the treatments, with highest biomass accumulation of 6.83 Mg ha-1 occurring in T5. The T1 presented the highest biomass for roots representing 33.4% of the total biomass. The biomass distribution among the different components in the decreasing order was: roots > stem wood > leaves > branches > stem bark, for all the treatments. The treatment with higher doses of fertilizers (T5) presented the highest amount of nutrient accumulation in the total biomass (131.26 kg ha-1). The concentration and accumulation of nutrients presented the following trend K > N > Ca > Mg > P > S. Analyzing the different components of biomass, the highest amounts of nutrients followed the order: leaves > roots > stem wood > branches > stem bark. Fertilization influenced the biomass production of E. urophylla in arenized soil in the Pampa biome, but without significant differences to date (12 months). The leaves had the highest concentration of macronutrients, with the exception of Ca, which was higher in the bark. The K was the element that presented highest accumulation in whole tree. The plantation of eucalyptus with fertilization management may be an alternative for the economic use of arenized soil.

scholarly journals Effects of Stand Age on Biomass Allocation and Allometry of Quercus Acutissima in the Central Loess Plateau of China

Forests ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 41 ◽  
Author(s):  
Bin Yang ◽  
Wenyan Xue ◽  
Shichuan Yu ◽  
Jianyun Zhou ◽  
Wenhui Zhang
Keyword(s):  
Biomass Allocation ◽  
Aboveground Biomass ◽  
Belowground Biomass ◽  
Stem Bark ◽  
Stand Age ◽  
Tree Biomass ◽  
Quercus Acutissima ◽  
Stem Wood ◽  
Biomass Equations ◽  
Total Tree

We studied the effects of stand age on allocation and equation fitting of aboveground and below-ground biomass in four Quercus acutissima stands (14, 31, 46, and 63 years old) in the Central Loess Plateau of China. The stem wood, stem bark, branch, foliage, and belowground biomass of each of the 20 destructive harvesting trees were quantified. The mean total biomass of each tree was 28.8, 106.8, 380.6, and 603.4 kg/tree in the 14-, 31-, 46-, and 63-year-old stands, respectively. Aboveground biomass accounted for 72.25%, 73.05%, 76.14%, and 80.37% of the total tree biomass in the 14-, 31-, 46-, and 63-year-old stands, respectively, and stem wood was the major component of tree biomass. The proportion of stem (with bark) biomass to total tree biomass increased with stand age while the proportions of branch, foliage, and belowground biomass to total tree biomass decreased with stand age. The ratio of belowground biomass to aboveground biomass decreased from 0.39 in the 14-year-old stand to 0.37, 0.31, and 0.24 in the 31-, 46-, and 63-year-old stands, respectively. Age-specific biomass equations in each stand were developed for stem wood, stem bark, aboveground, and total tree. The inclusion of tree height as a second variable improved the total tree biomass equation fitting for middle-aged (31-year-old and 46-year-old) stands but not young (14 years old) and mature (63 years old) stands. Moreover, biomass conversion and expansion factors (BCEFs) varied with stand age, showing a decreasing trend with increasing stand age. These results indicate that stand age alters the biomass allocation of Q. acutissima and results in age-specific allometric biomass equations and BCEFs. Therefore, to obtain accurate estimates of Q. acutissima forest biomass and carbon stocks, age-specific changes need to be considered.

Effect of tree, stand, and site variables on the allometry of Eucalyptus globulus tree biomass

2007 ◽  
Vol 37 (5) ◽  
pp. 895-906 ◽  
Author(s):  
Nuno António ◽  
Margarida Tomé ◽  
José Tomé ◽  
Paula Soares ◽  
Luís Fontes
Keyword(s):  
Aboveground Biomass ◽  
Eucalyptus Globulus ◽  
Predictive Ability ◽  
Stand Density ◽  
Stem Bark ◽  
Seemingly Unrelated Regression ◽  
System Of Equations ◽  
Tree Allometry ◽  
Stem Wood ◽  
Stage Of Development

The objective of this study was to develop a system of compatible equations to estimate eucalyptus ( Eucalyptus globulus Labill.) tree aboveground biomass and biomass of tree components for forest biomass prediction across regional boundaries. Data came from 441 trees sampled on several sites (99 and 14 plots in planted and coppice regenerated stands, respectively) representative of the eucalyptus expansion area in Portugal. The system of equations, simultaneously fitted using seemingly unrelated regression, was based on the allometric model for the biomass of stem wood, stem bark, leaves, and branches. Total aboveground biomass was expressed as the sum of the biomass of the respective tree components. The study allowed the following conclusions: (i) there is a significant increase in the predictive ability of the models that include height (stem components) or crown length (crown components) as an additional predictor to diameter at 1.30 m; (ii) there is a clear effect of the stage of development of the stand on tree allometry, with a decreasing pattern of the allometric constants; (iii) no effect of stand density, site index or climate on tree allometry was found; and (iv) for practical purposes, the same system of equations can be used for planted and coppice regenerated stands.

Biomass and nutrient element dynamics in Douglas-fir: effects of thinning and nitrogen fertilization over 18 years

1996 ◽  
Vol 26 (3) ◽  
pp. 376-388 ◽  
Author(s):  
A.K. Mitchell ◽  
H.J. Barclay ◽  
H. Brix ◽  
D.F.W. Pollard ◽  
R. Benton ◽  
...  
Keyword(s):  
Net Primary Production ◽  
N Uptake ◽  
Basal Area ◽  
Stem Bark ◽  
N Fertilization ◽  
Douglas Fir ◽  
Total Biomass ◽  
Matter Production ◽  
Second Period

The effects of thinning (two-thirds of basal area removed) and N fertilization (448 kg N/ha as urea) on biomass and nutrition of a 24-year-old Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) stand at Shawnigan Lake were studied over 18 years. At years 0, 9, and 18 after treatments, the aboveground biomass and N, P, K, Ca, and Mg contents of stemwood, stem bark, foliage, and dead and live branches were determined (kg/ha), and increments in these properties (kg•ha−1•year−1) were calculated for the 0–9 and 9–18 year periods. Foliar biomass was increased by both treatments during the first period and also by thinning in the second period. Aboveground net primary production (ANPP) per unit of foliage biomass (foliage efficiency) was increased by treatments in the 0–9 year period. The combined effects of increased foliage mass and foliage efficiency resulted in increased total biomass production. Thinning and fertilization increased the uptake of all elements except for P with fertilization. This increase may have contributed to the long-term increase in stem growth. Retranslocation of elements before foliage shedding was important for tree nutrition, but was not improved by fertilization during the 9–18 year measurement period. The efficiency of N use in dry matter production (ANPP/unit of N uptake) was decreased by fertilization. This implied that poor sites would respond better to fertilization than rich sites.

Tree biomass equations for Abiesbalsamea and Piceaglauca in northwestern New Brunswick

1981 ◽  
Vol 11 (1) ◽  
pp. 13-17 ◽  
Author(s):  
M. F. Ker ◽  
G. D. Van Raalte
Keyword(s):  
New Brunswick ◽  
Basal Area ◽  
White Spruce ◽  
Stem Bark ◽  
Balsam Fir ◽  
Stem Wood ◽  
Crown Length ◽  
Crown Width ◽  
Crown Volume ◽  
Total Tree

Equations are given, based on data from 298 balsam fir and 88 white spruce trees in northwestern New Brunswick, for predicting ovendry weight of biomass for balsam fir and white spruce trees. Separate equations are given for each of nine components: stem wood, stem bark, total stem, branches, foliage, total crown, total aboveground weight, roots, and total tree. Independent variables used in the equations include diameter at breast height (dbh), height, crown width, crown length, and indices of basal area, crown area, and crown volume.

CONTRIBUTION OF AGROFORESTS IN ADAPTATION OF CLIMATE CHANGE EFFECTS: ESTIMATING THE PHYTODIVERSITY AND C SEQUESTRATION POTENTIAL IN 8-, 16- AND 24-YEAR-OLD OF PINUS SYLVESTRIS AGROFORESTS IN NORTHERN CAMEROON (TROPICAL AFRICA)

2021 ◽  
pp. 2050010
Author(s):  
V. NOIHA NOUMI ◽  
P. KOUAM KAMNING ◽  
C. KAMDOUM DEMGUIA ◽  
L. ZAPFACK
Keyword(s):  
Aboveground Biomass ◽  
Basal Area ◽  
Allometric Equation ◽  
Shannon Index ◽  
Nondestructive Method ◽  
Total Carbon ◽  
Total Biomass ◽  
Importance Value Index ◽  
Importance Value ◽  
Sequestration Potential

The study aims at assessing the agrobiodiversity and carbon stocks by the pine agroforests in the Sudano-Guinean zone of Cameroon. Five [Formula: see text][Formula: see text]m sampling transects were established in each chronosequence, it was undertaken to assess the growth characteristics and biomass. Estimates of stocks of carbon in aboveground biomass, belowground biomass (BGB), total biomass (TB) and CO2 equivalent stock were incorporated in allometric equation based on nondestructive method. A total of 24 species from 23 genera and 17 families were inventoried. Annona senegalensis, Syzygium guineensis and Hymenocardia acida contributed the most to the importance value index (IVI). Density ranged between [Formula: see text]–[Formula: see text] stems/ha; basal area between [Formula: see text]–[Formula: see text][Formula: see text]m2/ha; Shannon index between [Formula: see text]–[Formula: see text] with the highest value for 8-year-old stands; Pielou’s evenness between [Formula: see text]–[Formula: see text] with the lowest value in 24-year-old stands. Aboveground biomass ranged between [Formula: see text]–[Formula: see text] Mg C/ha with the highest value in 16-year-old stands; belowground carbon from [Formula: see text] Mg C/ha to [Formula: see text] Mg C/ha and total carbon from [Formula: see text] Mg C/ha to [Formula: see text] Mg C/ha. The sequestration potential ranged from [Formula: see text] Mg CO[Formula: see text]/ha to [Formula: see text] Mg CO[Formula: see text]/ha. The sequestration rates were 84.77, 49.7 and 28.6 Mg CO[Formula: see text].ha[Formula: see text]yr[Formula: see text] in 8-, 16- and 24-year-old stands, respectively. Although our data reported that pine stands hosted a few number of species; they are true carbon sinks and useful to the REED[Formula: see text] community.

Dry matter production in 40-year-old Pinusbanksiana stands in Quebec

1976 ◽  
Vol 6 (3) ◽  
pp. 357-367 ◽  
Author(s):  
Rene Doucet ◽  
John V. Berglund ◽  
C. Eugene Farnsworth
Keyword(s):  
Dry Matter ◽  
Basal Area ◽  
Stand Density ◽  
Stem Bark ◽  
Dry Matter Production ◽  
Regression Equations ◽  
Annual Increment ◽  
Stem Wood ◽  
Matter Production ◽  
Stand Density Index

Dry matter production data were obtained for jack pine (Pinusbanksiana Lamb.) stands growing at three density levels on two sites. Regression equations relating tree weight to diameter and height were calculated for stem wood, stem bark, branches, needles, cones, and total aboveground biomass, as well as for periodic net annual increment of these components. Different sets of equations were needed to evaluate biomass on each site, but density levels within sites could be grouped. Total net periodic annual weight increment was linearly related to foliage weight and basal area, but a levelling-off at higher densities was evident when basal area was replaced by stand density index or bole area equivalent as the measure of density.

scholarly journals Aboveground biomass and nutrients in an 18-years-old stand of blue spruce (Picea pungens Engelm.) as a substitute tree species

2012 ◽  
Vol 58 (No. 6) ◽  
pp. 253-264 ◽  
Author(s):  
O. Špulák
Keyword(s):  
Aboveground Biomass ◽  
Dry Matter ◽  
Stand Structure ◽  
Total Content ◽  
Dry Weight ◽  
Complete Removal ◽  
Nutrient Contents ◽  
Stem Wood ◽  
Blue Spruce ◽  
Structure Correlations

Sample trees were taken for analyses from an 18-years-old blue spruce stand growing in the summit part of the Jizerské hory Mts. (Czech Republic). The sample trees were measured and dry matter and nutrient contents were analysed in needles, branches, bark and stem wood. Based on the actual stand structure, correlations were calculated between the diameter, dry weight of components and nutrient reserves. Dry matter of the stand constituted 46% of the stand fresh weight. The highest amount of nutrients was accumulated in needles (from 42% in magnesium to 82% in phosphorus) and the lowest in the stem wood (from 2% in phosphorus to 15% in potassium). Regarding the character of the locality, the complete removal of aboveground biomass during tending operations represents a considerable loss of nutrients. If only the merchantable timber volume is processed, the loss of the elements from the ecosystem could be reduced to 8% (phosphorus) to 22% (calcium and potassium) of the total content of these elements in the aboveground biomass of removals.  

scholarly journals Biomass and Stand Characteristics of a Highly Productive Mixed Douglas-Fir and Western Hemlock Plantation in Coastal Washington

2009 ◽  
Vol 24 (4) ◽  
pp. 180-186 ◽  
Author(s):  
Robert B. Harrison ◽  
Thomas A. Terry ◽  
Christopher W. Licata ◽  
Barry L. Flaming ◽  
Rod Meade ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Tree Height ◽  
Stem Bark ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Biomass Estimation ◽  
High Productivity ◽  
Stem Wood ◽  
Stand Attributes ◽  
Live Tree

Abstract Aboveground biomass predictive equations were developed for a highly productive 47-year-old mixed Douglas-fir and western hemlock stand in southwest Washington State to characterize the preharvest stand attributes for the Fall River Long-Term Site Productivity Study. The equations were developed using detailed biomass data taken from 31 Douglas-fir and 11 western hemlock trees within the original stand. The stand had an average of 615 live trees per hectare, with an average dbh of 35.6 cm (39.1 cm for Douglas-fir and 33.3 cm for western hemlock) and an average total tree height of 31.6 m (32.8 m for Douglas-fir and 30.2 m for western hemlock). Equations developed were of the form ln Y = b1 + b2 ln dbh, where Y = biomass in kg, dbh = diameter in cm at 1.3 m height, b1 = intercept, and b2 = slope of equation. Each tree part was estimated separately and also combined into total aboveground biomass. The total aboveground biomass estimation equations were ln Y = −0.9950 + 2.0765 ln dbh for Douglas-fir, and ln Y = −1.6612 + 2.2321 ln dbh for western hemlock. The estimate of the aboveground live-tree biomass was of 395 Mg ha−1 (235 Mg ha−1 for Douglas-fir and 160 Mg ha−1 for western hemlock), with 9.5, 29.3, 12.9, 308, and 32.7 Mg ha−1 in the foliage, live branches, dead branches, stem wood, and stem bark, respectively. When compared with biomass estimates from six other studies, ranging in age from 22 to 110 years and from 96.3 to 636 Mg ha−1, the biomass of the Fall River site was relatively high for its age, indicating very high productivity.

Biomass Inventory of Federal Forest Lands at Petawawa: A Case Study

1985 ◽  
Vol 61 (2) ◽  
pp. 81-86
Author(s):  
I. S. Alemdag ◽  
G. M. Bonnor
Keyword(s):  
Aboveground Biomass ◽  
Total Biomass ◽  
Natural Forests ◽  
Stem Wood ◽  
Forest Strata ◽  
Tree Component ◽  
Forest Lands

An inventory was completed of federal forest lands located near Petawawa, Ontario. Using established procedures, the inventory was designed to provide estimates of standard forest data as well as of forest biomass.The average ovendry biomass on the 18 337 ha or natural forests was 130 t/ha. For individual forest strata, averages ranged from 69 t/ha to 159 t/ha. By stand component, trees equal to or greater than 8.1 cm dbh contained 96% of total biomass. saplings contained 3%, and seedlings 1%. By tree component, stem wood accounted for 66% of total biomass. Estimates were made of biomass quantities removed; this ranges from 69% to 95% of total stand biomass, depending on harvesting method.An assessment of changes required in conventional inventory procedures for estimating aboveground biomass indicated that they would be minor, with no serious effects on cost, time, or precision.

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