Productivity of Short-Rotation Aspen Stands

1986 ◽  
Vol 62 (1) ◽  
pp. 10-15 ◽  
Author(s):  
W. M. Stiell ◽  
A. B. Berry
Keyword(s):  
Biomass Production ◽  
Nutrient Deficiency ◽  
Foliar Analysis ◽  
Annual Increment ◽  
Short Rotation ◽  
High Incidence ◽  
Mean Annual Increment

A study of aspen sucker stands subjected to repeated harvesting at the Petawawa National Forestry Institute compared biomass production at rotations of 1, 2, 3, 5, 8,13, and 20 years. The shortest rotation at which sucker production can be physiologically sustained is unlikely to be less than 10 years. Biomass mean annual increment appeared to culminate at about 15 years. Declining yields at the shorter rotations were thought due mainly to starvation of rootstocks by the frequent removal of the photosynthesizing tops on which they depend for nourishment. High incidence of Armillaria infection in stump roots probably contributed to the diminished quantity and size of suckers, and may prove to be a serious factor in short-rotation systems for aspen. On the basis of foliar analysis there was no evidence of nutrient deficiency at any rotation.

scholarly journals Carbon sequestration and growth of Anthocephalus cadamba plantation in North Kalimantan, Indonesia

2017 ◽  
Vol 18 (4) ◽  
pp. 1385-1393
Author(s):  
AGUS SARJONO ◽  
ABUBAKAR M. LAHJIE ◽  
B.D.A.S. SIMARANGKIR ◽  
R. KRISTININGRUM ◽  
YOSEP RUSLIM
Keyword(s):  
Carbon Sequestration ◽  
Biomass Production ◽  
Primary Source ◽  
Maximum Point ◽  
Forest Plantation ◽  
Annual Increment ◽  
Carbon Absorption ◽  
Environmental Amelioration ◽  
Mean Annual Increment ◽  
Anthocephalus Cadamba

Sarjono A, Lahjie AM, Simarangkir BDAS, Kristiningrum R, Ruslim Y. 2017. Carbon sequestration and growth of Anthocephalus cadamba plantation in North Kalimantan, Indonesia. Biodiversitas 18: 1385-1393. Forest plantation of Jabon (Anthocephalus cadamba) plays many important roles for the primary source of timber production and also the carbon absorption for environmental amelioration. The growth of A. cadamba trees was measured using the formulas of MAI (Mean Annual Increment) and PAI (Periodic Annual Increment) as the basis of the increment measurement, while the analysis of biomass and carbon with simple linear regression (y = a + bx) was used, with the coefficient of R2 = 0.90. The annual increment of A. cadamba trees reached its maximum point or the intersection between MAI and PAI at the age of 8 years, showing the maximum production of A. cadamba trees. Forest plantation of A. cadamba produced biomass and carbon sequestration of 81.90 ton ha-1 and 39.31 ton ha-1, respectively at the age of 8 years. However, the amount of biomass and carbon in another plot of A. cadamba trees was 96.85 ton ha-1 and 46.49 ton ha-1, respectively. While the values of the third plot were 116.84 ton ha-1 and 56.08 ton ha-1, respectively. The correlation between the diameter and biomass production and the correlation between the age of stands and carbon production were very strong with R2 value was higher than 0.90. This indicated that Jabon (Anthocephalus cadamba) plantation had important roles in carbon sequestration and biomass production.

scholarly journals Eucalyptus for Low Elevation Foothill Plantations in California

1997 ◽  
Vol 12 (4) ◽  
pp. 104-107
Author(s):  
John W. LeBlanc ◽  
Janine K. Hasey ◽  
Richard B. Standiford ◽  
Mike Connor ◽  
Roy M. Sachs
Keyword(s):  
Sierra Nevada ◽  
Hybrid Poplar ◽  
Annual Increment ◽  
Culture Techniques ◽  
Short Rotation ◽  
Hardwood Trees ◽  
Sierra Nevada Foothills ◽  
Rotation Age ◽  
Intensively Managed ◽  
Mean Annual Increment

Abstract In March 1984 we established a test plantation of selected Eucalyptus and poplar seedlings species and clones on a range site in the Sierra Nevada foothills. The main objectives were to evaluate survival and growth of the various species and clones and to determine a rotation age for intensively managed hardwood trees grown under low elevation foothill conditions. Seedlings and clones of six species of Eucalyptus and one hybrid poplar were grown with short rotation intensive culture techniques for 7 yr. Rotation age, defined as the culmination of mean annual increment, varied from 3 to 6 yr. The best producing clone produced 8 cords of fuelwood per acre per year. The potential for damage from freezing and snow at these elevations is also discussed. West. J. Appl. For. 12(4):104-107.

Biomass Production and Nutritional Efficiency in Eucalyptus Genotypes in the Pampa Biome

2019 ◽  
pp. 1-10
Author(s):  
Claudiney Do Couto Guimarães ◽  
Mauro Valdir Schumacher ◽  
Dione Richer Momolli ◽  
Huan Pablo de Souza ◽  
Aline Aparecida Ludvichak ◽  
...  
Keyword(s):  
Biomass Production ◽  
Eucalyptus Grandis ◽  
Annual Increment ◽  
Utilization Coefficient ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Biomass Components ◽  
Mean Annual Increment ◽  
Eucalyptus Urograndis

The objective of this work was to determine biomass production and nutritional efficiency in three eucalyptus genotypes in the Pampa Biome. For determination of biomass and nutritional characterization, nine medium trees per genotype were sampled, separated in the components leaf, branch, bark, wood and root. The nutritional efficiency of the biomass components was determined using the biological utilization coefficient (BUC). The highest biomass production and mean annual increment were observed in the Eucalyptus urograndis hybrid with 158 Mg ha-1 and 47.2 m³ ha-1, followed by Eucalyptus grandis with 137 Mg ha-1 and 39.7 m³ ha-1 and Eucalyptus dunnii with 122 Mg ha-1 and 23.2 m³ ha-1. For wood, the best nutritional efficiency was provided by Eucalytpus urograndis for P, Ca, and Mn, followed by Eucalytpus grandis for N and Mg, and Eucalytpus dunnii for K.

scholarly journals Direct Assessment of Biomass Productivity in Short Rotation Forestry (SRF) with the Terrestrial Laser Scanner (TLS). Case of Study in NE Part of Romania (Preliminary Results)

2020 ◽  
Vol 3 (1) ◽  
pp. 93
Author(s):  
Iulian Constantin Dănilă
Keyword(s):  
Biomass Production ◽  
Laser Scanner ◽  
Biomass Productivity ◽  
Tree Height ◽  
Allometric Equations ◽  
Accurate Information ◽  
Terrestrial Laser Scanner ◽  
North East ◽  
Short Rotation ◽  
Destructive Methods

Short rotation forestry (SRF) provides an important supply of biomass for investors in this area. In the NE (North-East) part of Romania at the present time are installed over 800 Ha of this kind of crops. The SRF enjoys the support through environmental policies, in relation to climate change and the provisions of the Kyoto Protocol to reduce the concentration of CO2 in the atmosphere. A precise estimate of biomass production is necessary for the sustainable planning of forest resources and for the exchange of energy in ecosystems. The use of the terrestrial laser scanner (TLS) in estimating the production of above ground wood biomass (AGWB) of short rotation forestry (SRF) brings an important technological leap among indirect (non-destructive) methods. TLS technology is justified when destructive methods become difficult to implement, and allometric equations do not provide accurate information. The main purpose of the research is to estimate the biomass productivity on tree parts in short rotation forestry with TLS technology. Measuring the hybrid poplars crops by TLS may have the following consequences: (1) Higher accuracy of the estimate of biomass production in the SRF; (2) cost and time effective measurements over the biomass of tree parts; (3) new and validated allometric equations for SRF in NE Romania; (4) solid instrument for industry to estimate biomass. TLS technology gives accurate estimates for DBH, tree height and location, as much as the volume on segments, commercial volume or crown volume can be determined. The accuracy of these values depends on the original scan data and their co-registration. The research will contribute to the development of knowledge in the field of hybrid crops.

scholarly journals Poplar breeding for the purpose of biomass production in short rotation periods in Germany: Problems and first findings

1993 ◽  
Vol 69 (6) ◽  
pp. 727-729 ◽  
Author(s):  
Horst Weisgerber
Keyword(s):  
Biomass Production ◽  
Plant Material ◽  
High Yield ◽  
Land Utilization ◽  
Rotation Periods ◽  
Short Rotation ◽  
European North ◽  
Basic Plant ◽  
Poplar Breeding ◽  
First Results

Investigations so far on the suitability of poplars for biomass production in short rotation periods in Germany were conducted almost exclusively with clones conceived for conventional cultivation. To introduce improved plant material, a special breeding program was implemented in Hann. Münden. It takes into consideration the most important criteria of suitability for the new form of land utilization. A report is given on findings so far from the realization of this program. Comprehensive basic plant material is available for European, North American and East Asian species from the sections Aigeiros, Leuce and Tacamahaca. Interspecific crossings are being carried out mainly in order to make the best possible use of combination and heterosis effects. A period of at least 20 years is necessary to develop new cultivars with high yield performance and yield stability. First results are presented on hybrids of species which are site-tolerant, resistant and particularly fast-growing at the juvenile phase. Plans to produce multiclonal varieties, each with 5 to 10 suitable clones with the same growing rhythm are in place. Special cultivation recommendations advocate clonal mixtures for each of the most important site units and for different rotation periods of from 2 to 5, 6 to 10 and more than 10 years. Key words: poplar, breeding, biomass, short rotation

scholarly journals ECONOMIC APPROACH TO THE CHOICE OF TARGET WOOD SPECIES FOR THE FOREST GROWING IN KAMA REGION OF THE REPUBLIC OF TATARSTAN

2017 ◽  
pp. 20-27
Author(s):  
Пуряев ◽  
Aynur Puryaev ◽  
Мифтахов ◽  
Timur Miftakhov ◽  
Демаков ◽  
...  
Keyword(s):  
Tree Species ◽  
Market Value ◽  
Economic Assessment ◽  
Oak Forests ◽  
Forest Site ◽  
Economic Approach ◽  
Annual Increment ◽  
The Republic ◽  
Standard Terms ◽  
Mean Annual Increment

The objectives of economic assessment of forests, growing on rich soil and environmental conditions, are especially important for the Republic of Tatarstan, as forest site conditions are presented, mostly, fresh suramens and sudubravas. The aim is to develop an algorithm and a mathematical model of the tax and market value dynamics of stands, needed to justify the choice of target tree species. The object of the study is served as detached electronic database of forestry and forest taxation indices of Kama region, general commodity tables and rate per unit volume of standing wood. The methodology of the study was consistent sort and organize raw data on the studied parameters, as well as the drawing up of mathematical models of the dynamics of the studied parameters. According to the research rezults the algorithm of selecting the target tree species was developed, providing the highest economic benefit in cultivation. The pine stands are most profitable to grow at fresh suramens and oak forests at fresh sudubravas. Age of stand’s economic maturity, which occurs at the climax moment of values of mean annual increment of its tax value, is much lower for most tree species, than the established standard terms of logging.

The Energy Efficiency Of Willow Biomass Production In Poland – A Comparative Study

2015 ◽  
Vol 22 (1) ◽  
pp. 123-130 ◽  
Author(s):  
Stefan Szczukowski ◽  
Józef Tworkowski ◽  
Mariusz J. Stolarski ◽  
Michał Krzyżaniak
Keyword(s):  
Energy Efficiency ◽  
Comparative Study ◽  
Biomass Production ◽  
Field Experiments ◽  
Energy Gain ◽  
Short Rotation ◽  
Energy Inputs ◽  
The University

Abstract Field experiments with willow (Salix L.) coppice cultivation and Eko-Salix systems have been conducted at the University of Warmia and Mazury since 1992. In that wider context, the aim of the work described here was to compare energy inputs involved in setting up a plantation and producing biomass, and to assess the efficiency of willow-chips production under the coppice and Eko-Salix systems. The energy gain determined in the experiments was several to more than twenty times as great as the inputs needed to operate the plantation and to harvest willow biomass, this leaving both systems of willow cultivation under study attractive where setting up short-rotation coppices is concerned.

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