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Effect of mineral matter content on specific density of forest biomass

100%

Nurek T., Roman K.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2014

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nr 64 Agric.Forest Eng.

2

Investigations on the calorific value of forest chips

100%

Gendek A., Zychowicz W.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2014

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nr 63 Agric.Forest Eng.

3

Efficiency of energy wood chip production from forest biomass

86%

Moskalik T., Borkowska M., Sadowski J., Zastocki D.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2012

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tom 11

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nr 4

Various activities are undertaken worldwide in order to counteract the visible climate changes. One of them is promotion of renewable energy sources. Aims established by the European Commission with respect to increasing the share of energy obtained from RES assume an average increase of up to 20% by the year 2020. Poland, as an EU member state has been obliged to increase the share of energy from RES to 15%. Promoting renewable energy sources contributes to diversification of supplies, thus providing conditions for the development of energetics at a local level. Taking into account Polish conditionings it is believed that biomass, including forest biomass, can be an important renewable energy source. The present study focuses on the problem of efficiency of energy wood chip production from forest biomass utilizing a Bandit 2090 wood chipper. Chipping efficiency, depending on the condition of particular tree stands, ranged from 14 to 17 m3·h-1.

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Combustion heat and calorific value of the mix of sawdust and cones of common pine (Pinus sylvestris L.)

86%

Gendek A.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2015

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nr 66 Agric.Forest Eng.

5

Analysis of wood chippings fractions utilized for energy purposes

72%

Gendek A., Zychowicz W.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2015

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nr 65 Agric.Forest Eng.

The realized research was aimed at determining the water content, size and fractions of wood chippings obtained using different technologies. Average absolute water content of the tested wood chippings was between 43-90% and may serve as a basis for financial settlements between the suppliers and the power companies. The obtained fraction distribution results enable conclusion that regardless of the material type the largest fraction is the one with particles of 6-32 mm. The best quality of wood chippings are obtained from round wood and they meet the requirements of the PN-91/D-95009 norm for fuel wood chips. The chippings produced in woodland areas from forest cutting refuse do not meet the above-mentioned requirements and contain about 30% of contaminants and trees remaining in the forest cutting area after clearing with thin branches with needles. In order to achieve better composition, wood chip-pings from forest clearing waste should be mixed in appropriate proportion with wood chippings from cutting round wood.

6

Stump wood as an element of forest biomass to be used for generating energy

72%

Mikolajczak E., Mydlarz K., Popyk W.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

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tom 83

7

Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest

72%

Botkin D. B., Ngugi M. R., Doley D.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2014

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tom 57

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nr 192

A half-century of forest inventory research involving statistically-valid fieldmeasurements (using statistically representative sample size and showing confidence limits) and well-validated forecasting methods are reviewed in this paper. Some current procedures overestimate global and large-scale forest biomass, carbonstorage, and carbon sequestering rates because they are based on statistically-invalid methods (errors in estimates are unavailable and unreported), or they fail to consider key dynamic characteristics of forests. It is sometimes assumed that old-growth forests can serve as fixed, steady-state storage of biomass and carbon for indefinitely long periods, but it is shown by both modelling and remote sensing that forests are dynamic systems, the state of which can change considerably over as shorta time as a decade. Forecasting methods show that maximum biomass and carbon storage in some important forest types occurs in mid-succession, not in old-growth. It is proposed, therefore, that realistic biomass and carbon storage estimates used for carbon credits and offsets be determined as the statistical mean minus the confidence interval and that practical carbon sequestering programs include specific timeframes, not indefinitely long periods of time.

8

Zmiany biomasy runa boru chrobotkowego (Cladonio-Pinetum Juraszek 1928) pod wpływem nawożenia mineralnego (Doniesienie naukowe)

72%

Faltynowicz W.

Zeszyty Naukowe Wydziału Biologii i Nauk o Ziemi. Uniwersytet Gdański. Biologia

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1983

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nr 04

9

Estimating forest biomass by remote sensing RADAR data in Brazil

72%

Santos J. R., Gama F. F., da Conceicao Bispo P.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2014

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tom 57

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nr 192

10

Nitrogen content and biomass: scaling from the tree to the forest level

72%

Cheng D.-L., Zhong Q.-L.

Polish Journal of Ecology

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2012

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tom 60

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nr 4

Nitrogen is an essential nutrient for plant growth. Although much has been learned about its utilization and distribution within the plant body, little is known about the relationship between nitrogen content and standing biomass at the level of entire forests. Data for nitrogen content (N) and biomass (M) of 10 deciduous species in USA at the individual trees level and 37 species grown in three forest biomes (i.e. tropic, subtropics, and temperate) in China at stands level were gathered to determine the N versus M scaling relationships for different tissue- and organ-types (e.g. bark and leaves). Model Type II regression protocols were used to calculate scaling exponents and allometric constants (i.e. slopes and y-intercepts of log-log bivariate plots, respectively) between N and M to. At the level of individual plants, N scaled nearly isometrically with M for the different tissue- and organ-types (i.e. Nα M 0.97–1.04). At the stand-level, N scaled similarly with respect to leaf, branch, and bark M, despite differences in stand size-frequency distributions and species composition. However, total stand N scaled allometrically with respect to total stem or root M and thus to total stand mass (i.e. N α MT 0.77–0.87). This was attributed to the accumulation of wood (and other ‘necromass’ tissue components that have lower N content than physiologically active tissues) in progressively older (and thus more massive) tree stands. When coupled to the scaling of N with respect to annual plant growth rates, these exponents provide important boundary conditions with which to model forest nutrient cycling.

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Forest biomass for bioenergy: opportunities and constraints for good governance. A case study from Italy

72%

Maesano M., Drigo R., Lasserre B., Chirici G., Marchetti M.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2014

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tom 57

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nr 192

Interest in the use of biomass for energy has increased significantly in the last few years. The latest report by the Intergovernmental Panel on Climate Change highlights the influence mankind has had on the climate: an unprecedented increase in GHG levels in the last 800,000 years and a rise of 40% in CO2 concentrations since pre-industrial times. The challenge now is to find energy alternatives, and in this context, one important option is bioenergy, one of the most important energy sourcesof the future. In light of this, the goal of this paper was to assess the sustainable potential of woodfuel resources in Italy using WISDOM methodology. WISDOM, developed by the FAO, has been applied in many countries around the world. From this study, at national level, household consumption was at 19.3 Mt in 2003 (averagevalue), while the potential supply of woody biomass (productivity) was 24.9 Mt(average value), with a surplus of almost 6 million tons between household consumption and productivity. This study represents an advance in knowledge of the biomass potential for energy use in Italy, and, as such, is subject to possible future improvement. Forest bioenergy development creates good opportunities to mobilize the production potential of European forests, and to contribute to a more climate-friendly, bio-based economy.

12

Chosen properties of the forest and agricultural biomass

72%

Kaleta A., Gornicki K., Jarosz A.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2016

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nr 68

13

Agricultural and forest biomass as feedstock in the manufacture of solid biofuels

58%

Stolarski M., Graban L., Szczukowski S., Tworkowski J.

Polish Journal of Agronomy

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2010

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nr 02

14

Efekty pozyskiwania biomasy leśnej z cięć rębnych na cele energetyczne wybranymi maszynami

58%

Sadowski J.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2009

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tom 543

Analizowano podstawowe technologie stosowane przy pozyskiwaniu pozostałości zrębowych na cele energetyczne. Badano pracę wybranych rębaków oraz maszyny pakietującej „Slash Bundler 1490 D”. Określono wydajność i koszty. Wydajność pracy sprzętu zależy głównie od warunków terenowych na powierzchni, zebrania (koncentracji) pozostałości i organizacji pracy. O wielkości kosztów decydowały głównie ceny zakupu i wykorzystanie maszyn w ciągu roku.

15

Rozwój biomasy a upadek przemysłu drzewnego

51%

Hikiert M. A.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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2011

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tom 52

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nr 1-2

Ograniczanie wyników

Effect of mineral matter content on specific density of forest biomass

Investigations on the calorific value of forest chips

Efficiency of energy wood chip production from forest biomass

Combustion heat and calorific value of the mix of sawdust and cones of common pine (Pinus sylvestris L.)

Analysis of wood chippings fractions utilized for energy purposes

Stump wood as an element of forest biomass to be used for generating energy

Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest

Zmiany biomasy runa boru chrobotkowego (Cladonio-Pinetum Juraszek 1928) pod wpływem nawożenia mineralnego (Doniesienie naukowe)

Estimating forest biomass by remote sensing RADAR data in Brazil

Nitrogen content and biomass: scaling from the tree to the forest level

Forest biomass for bioenergy: opportunities and constraints for good governance. A case study from Italy

Chosen properties of the forest and agricultural biomass

Agricultural and forest biomass as feedstock in the manufacture of solid biofuels

Efekty pozyskiwania biomasy leśnej z cięć rębnych na cele energetyczne wybranymi maszynami

Rozwój biomasy a upadek przemysłu drzewnego