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Sustainable woody biomass production systems: a novel solution for energy, agriculture and the environment in Portugal

Azevedo, João; Feliciano, Manuel; Amaral, Alexandra; Fonseca, Felícia; Pinto, M. Alice; Patrício, Maria do Sameiro; Nunes, Luís; Ribeiro, A.C.; Rodrigues, Orlando; Monteiro, Maria do Loreto; Aguiar, Carlos; Castro, João Paulo; Santos, Sónia A.P.; Lo
Tipo: conferenceobject
Português
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Bioenergy is a major current issue within the agriculture and energy sectors and the society in general. The environmental and social concerns raised by first generation biofuel crops increased the interest on woody biomass. Biomass production for direct conversion to heat and/or electricity is common in northern European countries, the USA, and, more recently, southern Europe, mainly based on short rotation woody crops (SRWC). These crops are renewable sources of energy, CO2 neutral, able to preserve biodiversity and water, and to contribute to socio-economic development. In Portugal, there is an increasing demand of renewable and sustainable sources of energy. Portugal also presents conditions to expand biomass production and use for energy, namely through SRWCs. There is, however, a lack of experience in this field. With the purpose of studying short rotation woody crops dedicated to energy production, we have launched in Bragança, Portugal, a research project aiming to develop technology for the sustainable production, processing, and use of woody biomass for energy. The goal is to analyse environmental and socio-economic aspects of these crops considering carbon cycle, conservation of water, soils, and biodiversity, as well as creation of wealth locally. It also aims to evaluate the potential of northeastern Portugal for biomass production and carbon sequestration. In this presentation we address the rational behind the project...

Potential biomass production of a short rotation crop in Portugal

Patrício, Maria do Sameiro; Nunes, Luís; Saraiva, Daniel; Azevedo, João
Tipo: conferenceobject
Português
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There is a growing consensus that CO2 emissions from burning fossil fuels are altering the global climate. The Portuguese government aims to reduce national CO2 emissions by 8 %, at the levels of 1990, by 2012. The use of short rotation crops (SRC) such as willow and poplar as an energy source that produces very low net CO2 emissions could help meet these targets. In 2008, in the framework of the research project PTDC/AGR-CFL/64500/2006, a SRC crop was established in the Trás-os-Montes Region, Northern Portugal. The SRC was installed in a 4 ha area using willow (local hybrid Salix alba x Salix fragilis and a Swedish Salix. L. clone, Terra Nova), poplar (local Populus nigra and Populus x euroamericana, clone I-214) and ash (Fraxinus angustifolia). The crop was planted by simply pushing cuttings using a double row design with densities ranging from 15000 to 20000 cuttings per hectare for willow and 10000 to 15000 cuttings per hectare for poplar and ash. The cut back was done one growing season after plantation to encourage the development of coppice to produce more shoots. The SRC research trial is in the second year of the first 3-year cutting cycle. At this stage the potential biomass production and carbon storage were assessed. Poplar and willow clones presented higher growth and higher number of shoots per stool than their native counterparts. They also presented higher biomass production and...

Biomass Refinery as a Renewable Complement to the Petroleum Refinery

PINATTI, Daltro G.; CONTE, Rosa Ana; SOARES, Alvaro G.; PEREIRA, Maria Luiza G.; ROMAO, Erica Leonor; FERREIRA, Joao Carlos; OLIVEIRA, Isaias; MARTON, Luiz Fernando M.
Fonte: BERKELEY ELECTRONIC PRESS Publicador: BERKELEY ELECTRONIC PRESS
Tipo: Artigo de Revista Científica
Português
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Biomass Refinery is a sequential of eleven thermochemical processes and one biological process with two initial basic treatments: prehydrolysis for lignocellulosics and low temperature conversion for biomass with medium-to-high content of lipids and proteins. The other ten processes are: effluent treatment plant, furfural plant, biodiesel plant, cellulignin dryer, calcination, fluidized bed boiler, authotermal reforming of cellulignin for syngas production, combined cycle of two-stroke low-speed engine or syngas turbine with fluidized bed boiler heat recovery, GTL technologies and ethanol from cellulose, prehydrolysate and syngas. Any kind of biomass such as wood, agricultural residues, municipal solid waste, seeds, cakes, sludges, excrements and used tires can be processed at the Biomass Refinery. Twelve basic products are generated such as cellulignin, animal feed, electric energy, fuels (ethanol, crude oil, biodiesel, char), petrochemical substitutes, some materials (ash, gypsum, fertilizers, silica, carbon black) and hydrogen. The technology is clean with recovery of energy and reuse of water, acid and effluents. Based on a holistic integration of various disciplines Biomass Refinery maximizes the simultaneous production of food...

Biotechnological Utilization of Biodiesel-Derived Glycerol for the Production of Ribonucleotides and Microbial Biomass

Rivaldi, Juan Daniel; Sarrouh, Boutros Fouad; Branco, Ricardo de Freitas; de Mancilha, Ismael Maciel; da Silva, Silvio Silverio
Fonte: HUMANA PRESS INC; TOTOWA Publicador: HUMANA PRESS INC; TOTOWA
Tipo: Artigo de Revista Científica
Português
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Ten yeast strains were evaluated concerning their capabilities to assimilate biodiesel-derived glycerol in batch cultivation. The influence of glycerol concentration, temperature, pH and yeast extract concentration on biomass production was studied for the yeast selected. Further, the effect of agitation on glycerol utilization by the yeast Hansenula anomala was also studied. The yeast H. anomala CCT 2648 showed the highest biomass yield (0.30 g g(-1)) and productivity (0.19 g L-1 h(-1)). Citric acid, succinic acid, acetic acid and ethanol were found as the main metabolites produced. The increase of yeast extract concentration from 1 to 3 g L-1 resulted in high biomass production. The highest biomass concentration (21 g L-1), yield (0.45 g g(-1)) and productivity (0.31 g L-1 h(-1)), as well as ribonucleotide production (13.13 mg g(-1)), were observed at 700 rpm and 0.5 vvm. These results demonstrated that glycerol from biodiesel production process showed to be a feasible substrate for producing biomass and ribonucleotides by yeast species.; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico

Uso de tubete e de minitubete de compósito de polihidroxibutirato mais pó de madeira na produção e no plantio de mudas seminais e clonais de eucalipto; Use of tubes and minitubes of polyhydroxybutyrate plus wood powder composite in the production and planting of eucalyptus seedlings and cuttings

Arthur Junior, José Carlos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 13/05/2011 Português
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O início do uso de tubete na década de 80 revolucionou os viveiros, e hoje mesmo apresentando desvantagens, é amplamente difundido em todo o setor florestal. Esses tubetes de polipropileno, derivado do petróleo, possuem dois problemas: uso de fonte não renovável e resíduos para descarte. Uma alternativa é a substituição por plásticos biodegradáveis. Os objetivos foram avaliar: (a) a taxa de decomposição do compósito; (b) o crescimento em altura e em diâmetro do colo (DAC); (c) a produção de biomassa aérea e radicular; (d) a concentração de nutrientes nos tecidos vegetais; (e) a eficiência do uso de condições ambientais e de atributos do solo para predizer a taxa de decomposição. Os estudos no processo seminal ocorreram no viveiro da ESALQ, em Piracicaba. Para estudar a taxa de decomposição do compósito, utilizaram-se formulações com 20 e 30% (p p-1) de pó de madeira. No verão e no inverno aplicaramse 150; 225 e 300 g de N m-3 de substrato na fertilização de base. A diminuição de massa foi mensurada a cada dez dias, até 90 dias. Avaliou-se se o crescimento em altura e em DAC de mudas seminais entre 40-90 dias após a semeadura, a produção de biomassa e concentração de macronutrientes aos 90. No plantio realizado na E.E.C.F. de Anhembi...

Optimal Conditions for Biomass and Recombinant Glycerol Kinase Production Using the Yeast Pichia pastoris

Aizemberg, Raquel; Terrazas, Werner D. M.; Ferreira-Dias, Suzana; Valentini, Sandro R.; Gattas, Edwil A. L.
Fonte: Faculty Food Technology Biotechnology Publicador: Faculty Food Technology Biotechnology
Tipo: Artigo de Revista Científica Formato: 329-335
Português
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The extracellular glycerol kinase gene from Saccharomyces cerevisiae (GUT]) was cloned into the expression vector pPICZ alpha. A and integrated into the genome of the methylotrophic yeast Pichia pastoris X-33. The presence of the GUT1 insert was confirmed by PCR analysis. Four clones were selected and the functionality of the recombinant enzyme was assayed. Among the tested clones, one exhibited glycerol kinase activity of 0.32 U/mL, with specific activity of 0.025 U/mg of protein. A medium optimized for maximum biomass production by recombinant Pichia pastoris in shaker cultures was initially explored, using 2.31 % (by volume) glycerol as the carbon source. Optimization was carried out by response surface methodology (RSM). In preliminary experiments, following a Plackett-Burman design, glycerol volume fraction (phi(Gly)) and growth time (t) were selected as the most important factors in biomass production. Therefore, subsequent experiments, carried out to optimize biomass production, followed a central composite rotatable design as a function of phi(Gly) and time. Glycerol volume fraction proved to have a significant positive linear effect on biomass production. Also, time was a significant factor (at linear positive and quadratic levels) in biomass production. Experimental data were well fitted by a convex surface representing a second order polynomial model...

High nutrient removal rate from swine wastes and protein biomass production by full-scale duckweed ponds

Belli Filho, Paulo; Costa, Rejane H. R.; Mohedano, Rodrigo A.; Tavares, Flávia A.
Tipo: Artigo de Revista Científica
Português
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Artigo publicado em: Elsevier - Bioresource Technology; Duckweed ponds have been successfully used in swine waste polishing, generating a biomass with high protein content. Therefore, the present study evaluated the efficiency of two full-scale duckweed ponds considering nutrient recovery from a piggery farm effluent (produced by 300 animals), as well as the biomass yield and crude protein (CP) content. A significant improvement in the effluent quality was observed, with the removal of 98.0% of the TKN (Total Kjeldahl Nitrogen) and 98.8% of the TP (Total Phosphorous), on average. The observed nitrogen removal rate is one of the highest reported (4.4 g/m2day of TKN). Additionally, the dissolved oxygen level rose from 0.0 to 3.0 mg/L, on average. The two ponds together produced over 13 tons of biomass (68 t/hayear of dry biomass), with 35% crude protein content. Because of the excellent nutrient removal and protein biomass production, the duckweed ponds revealed a great potential for the polishing and valorisation of swine waste, under the presented conditions.

Nutrient recovery from swine waste and protein biomass production using duckweed ponds (Landoltia punctata): Southern Brazil

Belli Filho, Paulo; Costa, Rejane H. R.; Mohedano, Rodrigo A.; Velho, Viviane F.; Horfmann, S. M.
Tipo: Artigo de Revista Científica
Português
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Artigo publicado em: IWA - Water Sciencie et Technology; Brazil is one of the most important countries in pork production worldwide, ranking third. This activity has an important role in the national economic scenario. However, the fast growth of this activity has caused major environmental impacts, especially in developing countries. The large amount of nitrogen and phosphorus compounds found in pig manure has caused ecological imbalances, with eutrophication of major river basins in the producing regions. Moreover, much of the pig production in developing countries occurs on small farms, and therefore causes diffuse pollution. Therefore, duckweed pond have been successfully used in the swine waste polishing, generating further a biomass with high protein content. The present study evaluated the efficiency of two full scale duckweed ponds for the polishing of a small pig farm effluent, biomass yield and crude protein (CP) content. Duckweed pond series received the effluent from a biodigester-storage pond, with a flow rate of 1 m3/day (chemical oxygen demand rate ¼ 186 kg/ha day) produced by 300 animals. After 1 year a great improvement of effluent quality was observed, with removal of 96% of total Kjeldahl nitrogen (TKN) and 89% of total phosphorus (TP)...

Algal biomass production and wastewater treatment in high rate algal ponds receiving disinfected effluent

Santiago, Aníbal F.; Calijuri, Maria Lucia; Assemany, Paula P.; Calijuri, Maria do Carmo; Reis, Alberto
Fonte: Taylor & Francis Publicador: Taylor & Francis
Tipo: Artigo de Revista Científica
Publicado em //2013 Português
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66.35%
Algal biomass production associated with wastewater is usually carried out in high rate algal ponds (HRAPs), which are concomitantly used in the treatment of such effluent. However, most types of wastewater have high levels of bacteria that can inhibit the growth of algal biomass by competing for space and nutrients. The objective of this study was to assess the influence of ultraviolet (UV) pre-disinfection on the performance of HRAPs used for wastewater treatment and algal biomass production. Two HRAPs were tested: one received effluent from an upflow anaerobic sludge blanket (UASB) reactor – HRAP – and the second received UASB effluent pre-disinfected by UV radiation – UVHRAP. Physical, chemical and microbiological parameters were monitored, as well as algal biomass productivity and daily pH and dissolved oxygen (DO) variation. The UVHRAP presented highest DO and pH values, as well as greater percentage of chlorophyll a in the biomass, which indicates greater algal biomass productivity. The average percentages of chlorophyll a found in the biomass obtained from the HRAP and the UVHRAP were 0.95±0.65% and 1.58±0.65%, respectively. However, total biomass productivity was greater in the HRAP (11.4 gVSS m-2 day-1) compared with the UVHRAP (9.3 gVSS m-2 day-1). Mean pH values were 7.7±0.7 in the HRAP and 8.1±1.0 in the UVHRAP...

Growth and production of irrigated vitória pineapple grown in semi-arid conditions

Pegoraro,Rodinei Facco; Souza,Bruna Aparecida Madureira de; Maia,Victor Martins; Amaral,Uirá do; Pereira,Marlon Cristian Toledo
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2014 Português
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This study aimed to evaluate the growth characteristics of irrigated Vitória pineapple plants grown in semi-arid conditions and determine its developmental stages based on those characteristics. It was used a randomized block design with four replicates. The experimental treatments were: plant harvest at 270, 330, 390, 450, 510, 570, 690, 750, and 810 days after planting (DAP). The following variables were determined: plant height, stem diameter, D-leaf length, D-leaf fresh and dry mass, biomass production of plants and plant parts (organs), and vegetative biomass. Five phenological stages are proposed based on vegetative biomass production: < 20% biomass production (V1); 21-40% (V2); 41-60% (V3); 61-80% (V4); and > 80% (V5). The maximum growth rate for plant height, D-leaf length, and stem diameter was observed at the end of the phenological stage V1 (390-411 DAP), and at the end of stage V5 these plant traits had average values of 106, 82, and 7 cm, respectively. The maximum biomass accumulation rates were observed at stages V4 and V5, resulting in a final fruit yield and total fresh biomass of 72 t ha-1 and 326 t ha-1, respectively. Finally, we estimated that 80% of the accumulated biomass may remain in the field after fruit and slip harvest...

Application of response surface methodology to enhancement of biomass production by Lactobacillus rhamnosus E/N

Polak-Berecka,Magdalena; Wa?ko,Adam; Kordowska-Wiater,Monika; Targo?ski,Zdzis?aw; Kubik-Komar,Agnieszka
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2011 Português
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Response surface methodology (RSM) was employed to study the effects of various medium components on biomass production by Lactobacillus rhamnosus E/N. This strain is commonly used in the pharmaceutical and food industries due to its beneficial effect on the human gut and general health. The best medium composition derived from RSM regression was (in g/l) glucose 15.44, sodium pyruvate 3.92, meat extract 8.0, potassium phosphate 1.88, sodium acetate 4.7, and ammonium citrate 1.88. With this medium composition biomass production was 23 g/l of dry cell weight after 18 h of cultivation in bioreactor conditions, whereas on MRS the yield of biomass was 21 g/l of dry cell weight. The cost of 1 g of biomass obtained on MRS broth was calculated at the level of 0.44 ? whereas on the new optimal medium it was 25% lower. It may be concluded then, that the new medium, being cheaper than the control MRS allows large scale commercial cultivation of the L. rhamnosus strain. This study is of relevance to food industry because the possibility to obtain high yield of bacterial biomass is necessary step in manufacturing of probiotic food.

Evaluation of biomass production, carotenoid level and antioxidant capacity produced by Thermus filiformis Using fractional factorial design

Mandelli, Fernanda; Yamashita, Fábio; Pereira, José L.; Mercadante, Adriana Z.
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: text
Português
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A fractional factorial design 25–1 was used to evaluate the effect of temperature, pH, and concentrations of yeast extract, tryptone and Nitsch’s trace elements on the biomass, total carotenoids and protection against singlet oxygen by carotenoid extracts of the bacterium Thermus filiformis. In addition, the carotenoid composition was determined by high-performance liquid chromatography connected to a diode array and mass spectrometer detectors (HPLC-DAD-MS/MS). The production of biomass ranged from 0.113 to 0.658 g/L, the total carotenoid from 137.6 to 1,517.4 µg/g and the protection against singlet oxygen from 4.3 to 85.1 %. Results of the fractional factorial design showed that temperature had a negative effect on biomass production and a positive effect on carotenoid content and protection against singlet oxygen, besides, high levels of pH value, concentrations of yeast extract and tryptone had a positive effect on biomass production only at lower temperatures. The main carotenoids of T. filiformis were thermozeaxanthins. In the tested conditions, changes in the levels of the variables influenced the biomass, carotenoid production, and protection against singlet oxygen, although they did not influence the carotenoid profile. The results of this study provide a better understanding on the interactions among certain nutritional and cultivation conditions of a thermophile bacterium...

Geographic and Habitat Origin Influence Biomass Production and Storage Translocation in the Clonal Plant Aegopodium podagraria

D?Hertefeldt, Tina; Eneström, Johanna M.; Pettersson, Lars B.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: text
Publicado em 10/01/2014 Português
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Through physiological integration, clonal plants can support ramets in unfavourable patches, exploit heterogeneously distributed resources and distribute resources that are taken up over large areas. Physiological integration generally increases in adverse conditions, but it is not well known which factors determine the evolution of physiological integration. The aim of this study was to investigate if clonal plants from Southern and Northern populations of the clonal herb Aegopodium podagraria differed in physiological integration in terms of translocation of carbon to the rhizomes, and in biomass production using a reciprocal transplant experiment. Aegopodium podagraria from shaded conditions have been suggested to share more resources than clones from open conditions and therefore, plants from forest and open populations within the Southern and Northern regions were included. The regional growing conditions greatly affected biomass production. Plants grown in North Sweden produced more biomass and allocated more biomass to shoots, while plants grown in South Sweden allocated more biomass to rhizomes. There was a regional origin effect as plants originating from North Sweden produced more biomass in both regions. Within the Northern region...

Removing Constraints on the Biomass Production of Freshwater Macroalgae by Manipulating Water Exchange to Manage Nutrient Flux

Cole, Andrew J.; de Nys, Rocky; Paul, Nicholas A.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: text
Publicado em 07/07/2014 Português
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46.33%
Freshwater macroalgae represent a largely overlooked group of phototrophic organisms that could play an important role within an industrial ecology context in both utilising waste nutrients and water and supplying biomass for animal feeds and renewable chemicals and fuels. This study used water from the intensive aquaculture of freshwater fish (Barramundi) to examine how the biomass production rate and protein content of the freshwater macroalga Oedogonium responds to increasing the flux of nutrients and carbon, by either increasing water exchange rates or through the addition of supplementary nitrogen and CO2. Biomass production rates were highest at low flow rates (0.1–1 vol.day?1) using raw pond water. The addition of CO2 to cultures increased biomass production rates by between 2 and 25% with this effect strongest at low water exchange rates. Paradoxically, the addition of nitrogen to cultures decreased productivity, especially at low water exchange rates. The optimal culture of Oedogonium occurred at flow rates of between 0.5–1 vol.day?1, where uptake rates peaked at 1.09 g.m?2.day?1 for nitrogen and 0.13 g.m?2.day?1 for phosphorous. At these flow rates Oedogonium biomass had uptake efficiencies of 75.2% for nitrogen and 22.1% for phosphorous. In this study a nitrogen flux of 1.45 g.m?2.day?1 and a phosphorous flux of 0.6 g.m?2.day?1 was the minimum required to maintain the growth of Oedogonium at 16–17 g DW.m?2.day?1 and a crude protein content of 25%. A simple model of minimum inputs shows that for every gram of dry weight biomass production (g DW.m?2.day?1)...

Responses of Plant Community Composition and Biomass Production to Warming and Nitrogen Deposition in a Temperate Meadow Ecosystem

Zhang, Tao; Guo, Rui; Gao, Song; Guo, Jixun; Sun, Wei
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: text
Publicado em 13/04/2015 Português
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Climate change has profound influences on plant community composition and ecosystem functions. However, its effects on plant community composition and biomass production are not well understood. A four-year field experiment was conducted to examine the effects of warming, nitrogen (N) addition, and their interactions on plant community composition and biomass production in a temperate meadow ecosystem in northeast China. Experimental warming had no significant effect on plant species richness, evenness, and diversity, while N addition highly reduced the species richness and diversity. Warming tended to reduce the importance value of graminoid species but increased the value of forbs, while N addition had the opposite effect. Warming tended to increase the belowground biomass, but had an opposite tendency to decrease the aboveground biomass. The influences of warming on aboveground production were dependent upon precipitation. Experimental warming had little effect on aboveground biomass in the years with higher precipitation, but significantly suppressed aboveground biomass in dry years. Our results suggest that warming had indirect effects on plant production via its effect on the water availability. Nitrogen addition significantly increased above- and below-ground production...

Woody Biomass and Bioenergy Potentials in Southeast Asia between 1990 and 2020

Sasaki, Nophea; Knorr, Wolfgang; Foster, David Russell; Etoh, Hiroko; Ninomiya, Hiroshi; Chay, Sengtha; Kim, Sophanarith; Sun, Sengxi
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Português
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Forests in Southeast Asia are important sources of timber and other forest products, of local energy for cooking and heading, and potentially as sources of bioenergy. Many of these forests have experienced deforestation and forest degradation over the last few decades. The potential flow of woody biomass for bioenergy from forests is uncertain and needs to be assessed before policy intervention can be successfully implemented in the context of international negotiations on climate change. Using current data, we developed a forest land use model and projected changes in area of natural forests and forest plantations from 1990 to 2020. We also developed biomass change and harvest models to estimate woody biomass availability in the forests under the current management regime. Due to deforestation and logging (including illegal logging), projected annual woody biomass production in natural forests declined from 815.9 million tons (16.3 EJ) in 1990 to 359.3 million tons (7.2 EJ) in 2020. Woody biomass production in forest plantations was estimated at 16.2 million tons yr?1 (0.3 EJ), but was strongly affected by cutting rotation length. Average annual woody biomass production in all forests in Southeast Asia between 1990 and 2020 was estimated at 563.4 million tons (11.3 EJ) yr?1 declining about 1.5% yr?1. Without incentives to reduce deforestation and forest degradation...

Biomass production and nutrition aspects of plantation trees in Amazonia.

NEVES, E.; AZEVEDO, C.P. de; GASPAROTTO, L.; DUNISCH, O.; BAUCH, J.
Fonte: In: SHIFT - WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBF, 1999. Publicador: In: SHIFT - WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBF, 1999.
Tipo: artigo em anais de congresso (alice) Formato: p. 413-418.
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Establishment from a correlation between the nutrient content and the biomass of plantation trees. This was done in order to predict and to influence the wood quality to be expected already at an early growth stage. The development of biomass production of Ceiba pentandra (L.) Gaertn. (paineira) and Virola surinamensis (Rottb.) Warb. (ucuuba) was studied under monocultural conditions at an experimental field of Embrapa Amazonia Ocidental (Manaus-AM). Subsequently, the data were related to the nutrient supply after 45 and 46 months, respectively. It could be shown that the supply of the trees, especiallu with K and P, is restricted. The percentile content per dry weight biomass of the two macronutrients P and Mg deveases remarkably between 45 and 65 months of plant age. In addition, the recycling of P, K, Ca, Mg, and S from litter fall amounts to distinctly higher figues in paineira than in ucuuba. The fingings of the correlation between the biomass and nutrient content indicate the need of fertilization in order to guarantee sustainable growth of high quality wood species.; 1999

Biomass production and mineral element supply of selected useful tropical plants.

SCHMIDT, P.; LIEBEREI, R.; PREISINGER, H.; BAUCH, J.; GASPAROTTO, L.
Fonte: In: IUFRO WORLD CONGRESS, 20., 1995, Tampere. Caring for the forest: research in a changing world - poster abstracts. Tampere: IUFRO, 1995. p. 11. Publicador: In: IUFRO WORLD CONGRESS, 20., 1995, Tampere. Caring for the forest: research in a changing world - poster abstracts. Tampere: IUFRO, 1995. p. 11.
Tipo: resumo em anais de congresso (alice)
Português
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This current investigation is part of a cooperative project of CPAA-Manaus and Hamburg University entitled "Recultivation of degraded and abandoned monocultures instable mixed cultures with special reference to soil biological factors". In this study the biomass product and the mineral element supply of selected useful tropical plants will be determined. Parallel to it the availability of nutrient element in the soil will be analyzed. These experiments may allow an evaluation, in which way a sustainable growth of the suggested plant system under the prevailing site conditions is possible.; 1995; Poster 11.

Biomass production and mineral element content of Swietenia macrophylla King in the juvenile phase.

SCHMIDT, P.; LIEBEREI, R.; BAUCH, J.; GASPAROTTO, L.
Fonte: In: SHIFT WORKSHOP, 3., 1998, Manaus. Program, abstracts of presentations and posters... Hamburg: GKSS, 1998. Publicador: In: SHIFT WORKSHOP, 3., 1998, Manaus. Program, abstracts of presentations and posters... Hamburg: GKSS, 1998.
Tipo: resumo em anais de congresso (alice) Formato: p. c7.
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Within this project, the biomass production and mineral element supply of several selected economic important tropical wood species were determined.; 1998

Biomass production and mineral element content of selected useful tropical plants.

SCHMIDT, P.; LIEBEREI, R.; PREISINGER, H.; GASPAROTTO, L.; BAUCH, J.
Fonte: In: SHIFT WORKSHOP, 2., 1995, Cuiaba. Summaries of lectures and posters... Cuiaba: UFMT, 1995. Publicador: In: SHIFT WORKSHOP, 2., 1995, Cuiaba. Summaries of lectures and posters... Cuiaba: UFMT, 1995.
Tipo: resumo em anais de congresso (alice) Formato: p. 160.
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This current investigation is part of the project "Recultivation of degraded and abandoned monocultures in stable mixed cultures with special reference to soil biological factors" situated in the CPAA/EMBRAPA in Manaus. In this study the biomass production and the mineral element content of selected useful tropical plants will be determined. Parallel to it the availability of nutrient elements in the soil will be analysed. These experiments may allow an evaluation, in which way a sustainable growth of the suggested plant system under the prevailing site conditions is possible. For this study the biomass of six-months and 2 1/2-year-old plants of Swietenia macrophylla King (mogno), Theobroma grandiflorum (Spreng.) K.Schum. (cupuacu), Bixa orellana L. (urucum),Schizolobium amazonicum Ducke (parica) and Bactris gasipaes H.B.K.(pupunha) was determined gravimetrically. For a high differentiation of the element content (Ca,Mg,K,P,S,N,Fe,Al) and to reveal physiological sinks within the plants, up to 30 fractions (leaves, wood, bark etc.) were separated and in time series the alterations of the fractions were exhibited. The element content was determined by Optical Emission Spectrometry (ICP-OES), and for selected tissues on a subcellular level with Energy Dispersive X-ray Spectroscopy (EDXS)(exception: N with Kjeldah). Preliminary results are illustrated for Swietenia. In particular the data for Ca show that the mineral element supply at this experimental area has to be sustainably maintained...