Wyniki wyszukiwania - Biblioteka Nauki

1

Energochłonność procesu balotowania pozostałości pozrębowych

100%

Moskalik T. , Nowacka W. L. , Sadowski J. , Zastocki D.

Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej

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2014

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tom 16

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nr 2B[39]

2

Pakietowanie pozostałości zrębowych nowym sposobem wykorzystania biomasy leśnej do celów energetycznych

100%

Chlebowski K. , Jablonski K.

Sylwan

|

2012

|

tom 156

|

nr 04

3

Co jest biomasą leśną, a co nią nie jest?

100%

Maszota L.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2012

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nr 04

4

Biomasa leśna jako odnawialne źródło energii - konsekwencje dla leśnictwa

100%

Paschalis-Jakubowicz P.

Sylwan

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2018

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tom 162

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nr 08

EN

The current provisions in the EU directive, applicable to the signatories of the document, assume reaching by 2020 a share of at least 20% of energy coming from renewable sources. The EU Parliament demands changes to the current directive on forest biomass and its contribution to the use of renewable energy. The Parliament considers it expedient to increase the amount of forest biomass obtained, including wood in various processing states, treating this solution as one of the active methods of replacing the energy derived from fossil fuels. The definition proposed by the EU Parliament states that countries and industrial plants in their areas can receive financial assistance and also be included in the group of energy users ‘from renewable sources’ if they obtain it from the combustion of wood, which will be collected only for this purpose. Such a case has led to the protest of over 750 scientists from around the world. In a letter sent from researchers to the EU, it was found that only harvested forest biomass coming exclusively from logging residues and wood waste, and not from wood intended for other use, should be taken into account for the purpose. Signatories of the letter warn that this change puts at risk both the global climate goals and maintaining the sustainability of the world’s forests. At the heart of the argument is the conviction of scientists that the defect of the directive is based on such a construction of regulations that will cause actions that cause expansive damage to forests in the world and accelerate the occurring climate change. The proposed solution is to limit the amount of forest biomass obtained only to the part that qualifies according to the directive, for logging residues and wood waste. The real danger, including concerning the stability of forests, is the possibility of overestimating the forest’s production capacity in supplying forest biomass. This claim is not an expression of academic caution. It is a real threat. The history of overestimation of forest potential is as long as the history of human development and in each case ended up with a total degradation of the forest and the lack of resources that forced migration of the population. This threat, both on a global scale and for our country, is high, first of all, because the implementation of energy policy assumptions, just like an agricultural policy, in each case leads to the direct growth of producers’ incomes. They are always higher, as are profits in other economic sectors, from revenue received from forest management. This income asymmetry may stimulate in our country, and in many countries of the world is already stimulating, changes in forest management leading to the reduction of forest biological diversity, as well as the growth of deforestation.

5

Szacowanie potencjału energetycznego drewna na tle obecnej bazy surowcowej w Lasach Państwowych

86%

Proskornicki M.

Przegląd Leśniczy

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2006

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tom 16

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nr 05

6

Zielony Grane Chipper

86%

Mach G.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2014

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nr 05

7

AHWI nowej generacji - różne nośniki i napędy

86%

Klim A.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2013

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nr 11

8

Maszyny z Włoch

86%

Suchocka K.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2015

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nr 02

9

Grzyby ektomykoryzowe w obiegu węgla w ekosystemach leśnych

86%

Kalucka I. , Jagodzinski A. M.

Sylwan

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2013

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tom 157

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nr 11

EN

In boreal and temperate forests fungi play a particularly important role, since most trees form a symbiotic relationship with many species of ectomycorrhizal (ECM) fungi, providing them with assimilates in exchange for minerals. Mycorrhiza is considered one of the most significant factors affecting functioning of forest ecosystems, and in particular the processes of carbon cycling and storage. ECM fungi are involved both directly through carbon accumulation in the mycelial system, and indirectly through their influence on tree biomass production and organic matter decomposition. The amount of carbon transferred to ECM fungi usually varies from 10 to 25 or even 50% of the host's net photosynthesis, thus they are a group of organisms that significantly affect carbon flow into the soil. Most of that carbon is built into the mycelial system and its structures (fungal parts of ECM roots, extramatrical hyphae and rhizomorphs, sporocarps, etc.). Carbon allocation to the underground part of trees, and thus to ECM roots, changes with stand age and stand development phase. The biomass of active ECM roots and mycelium usually reaches its maximum in young stands, in the canopy closure phase; frequently, this is also true for the standing biomass of fruit bodies. A large share of ECM sporocarps in the forest carbon budget and high levels of ECM vegetative mycelium respiration are considered to be among the main pathways for the release of CO2 from forest soil, indicating a significant role of ECM fungi in fast carbon flow via forest ecosystems. On the other hand, dead ECM fine roots and extramatrical mycelia are a very rich and important pool of sequestered carbon in the soil.

10

Duże rębaki do zadań specjalnych

86%

Bak P.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2014

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nr 10

11

Rębaki Bandit: amerykański bandyta

86%

Bak P.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2014

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nr 02

12

Nowe rębaki z Finlandii

86%

Grabowska K.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2015

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nr 04

13

Wpływ technologii pozyskania i składu zrębków leśnych na ich wartość opałową i zawartość popiołu

86%

Gendek A. , Malatak J. , Velebil J.

Sylwan

|

2018

|

tom 162

|

nr 03

EN

Wood chips composition and abundance of the impurities affecting the ash content are parameter of the chips quality that is important for the power plants. These parameters may be used as criteria in settlements between the supplier and the chipmaker. The determination of calorific value, ash content and share of individual elements in forest chips was undertaken. The wood chips obtained from the fragmentation of sawmill wastes and forest trees residues with various species compositions (Scots pine, multi−species and bundled Norway spruce residues) were investigated. The linear relationship between the ash content and the calorific value of the chips was determined. In all cases, the largest share (over 87%) in the composition of forest chips is assigned to the clean timber and wood particles with bark. The share of mineral impurities is within the range of 0.6−1.6%. The ash content in wood particles ranges 1.04−3.94% and is close to the values reported in the literature. In terms of ash content, the chips produced from bundled coniferous residues were the worst. The obtained results indicate that the best technology for obtaining high calorific value of dry wood chips (17.89−18.11 MJ/kg) with a low proportion of ash is the chipping of wood residues collected directly from the forest surface or from previously prepared piles. The least advantageous technology is the bundling of residues and their storage for several months (16.29 MJ/kg).

14

Pozyskiwanie biomasy a gleba leśna

86%

Sewerniak P.

Las Polski

|

2011

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nr 04

15

Zasobność energetyczna biomasy leśnej regionu opolskiego na przykładzie Nadleśnictwa Prószków

86%

Podskornicki M.

Przegląd Leśniczy

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2006

|

tom 16

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nr 06-07

16

Jakie drewno spalacie? - pytają urzędnicy

72%

Sloka M.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2013

|

nr 09

17

Dyskusja: biomasa leśna - szansa czy zagrożenie?

72%

Maszota L.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2012

|

nr 10

18

Biomasowy biznes (1): Dokąd zmierzamy?

72%

Szpojda B.

Drwal. Pismo Przedsiębiorców Leśnych

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2015

|

nr 03

19

Rębaki spod znaku Skorpiona

72%

Bak P.

Nowa Gazeta Leśna. Miesięcznik Wszystkich Pracujących w Lesie

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2013

|

nr 08

20

Baloty, zrębki i karpina

72%

Kaliszewski A.

Drwal. Pismo Przedsiębiorców Leśnych

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2013

|

nr 01