Consulta: subjectFacets:"Rubber"
Registros recuperados: 19
Data/hora: 11/06/2024 01:15:51

Are Local People Conservationists? Analysis of Transition Dynamics from Agroforests to Monoculture Plantations in Indonesia
Provedor de dados: 7
Autores: Schwarze, Stefan; Department of Agricultural Economics and Rural Development Georg-August-Universitaet Goettingen, Germany; sschwar1@gwdg.de; Levang, Patrice; IRD, Montpellier, France; CIFOR, Bogor, Indonesia; patrice.levang@mpl.ird.fr.
Tipo: Peer-Reviewed Reports
Palavras-chave: Agrarian transition; Agricultural intensification; Agroforestry; Cocoa; Coffee; Cropping trajectory; Indonesia; Oil palm; Rubber.
Ano: 2010

Trade-offs among forest value components in community forests of southwestern Amazonia
Provedor de dados: 7
Autores: Alverga, Paula; Universidade Federal do Acre, Brazil;; Barnes, Grenville; School of Forest Resources and Conservation, University of Florida, USA; gbarnes@ufl.edu; Brasil da Silva, Izaias; Universidade Federal do Acre, Brazil;; Castro, Wendeson; Universidade Federal do Acre, Brazil;; de Souza Moll, Iracema; Universidade Federal do Acre, Brazil;; Medeiros, Herison; Universidade Federal do Acre, Brazil; medeiros.herison@gmail.com; Murphy, Skya; Department of Biology, University of Florida, USA;; Rockwell, Cara A.; School of Forest Resources and Conservation, University of Florida, USA; rockwell_cara@yahoo.com; Shenkin, Alexander; School of Forest Resources and Conservation, University of Florida, USA; Department of Biology, University of Florida, USA; ashenkin@ufl.edu; Silveira, Marcos; Universidade Federal do Acre, Brazil;; Southworth, Jane; Department of Geography and Land Use and Environmental Change Institute, University of Florida, USA; jsouthwo@geog.ufl.edu; Perz, Stephen; Department of Sociology and Criminology &amp; Law, University of Florida, USA; sperz@soc.ufl.edu.
Contemporary conservation interventions must balance potential trade-offs between multiple ecosystem services. In tropical forests, much attention has focused on the extent to which carbon-based conservation provided by REDD+ policies can also mitigate biodiversity conservation. In the nearly one-third of tropical forests that are community owned or managed, conservation strategies must also balance the multiple uses of forest products that support local livelihoods. Although much discussion has focused on policy options, little empirical evidence exists to evaluate the potential for trade-offs among different tropical forest value components.   We assessed multiple components of forest value, including tree diversity, carbon stocks, and both timber and...
Tipo: Peer-Reviewed Reports
Palavras-chave: A&amp;#231; Ai; Biodiversity conservation; Brazil nut; Carbon stocks; Livelihood; NTFP; REDD; Rubber; Timber; Tropical rainforest.
Ano: 2014

Estimativa de custo de coleta e rentabilidade para sistema extrativo de látex de seringueira no Acre, safra 2001/2002.
Provedor de dados: 14
Autores: SANTOS, J. C. dos; SILVA, M. R. da; SA, C. P. de; NASCIMENTO, G. C. do; VEIGA, S. A.
A produção extrativa de látex de seringueira (Hevea brasiliensis) já representou a principal atividade econômica do Acre e continua sendo um dos principais geradores de renda para as famílias que residem nas áreas de floresta nativa do Estado. Para o setor primário, o conhecimento detalhado da composição dos custos de produção e rentabilidade de sistemas agroextrativistas constitui um importante norteador de políticas públicas, especialmente políticas de crédito rural, preços mínimos, pesquisa agropecuária, entre outras. Para sistemas extrativistas na Amazônia, são raros os estudos dessa natureza, realizados até o momento. Este trabalho tem o objetivo de apresentar uma estimativa dos custos de produção, ou custos de extração, de látex em seringal nativo...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Ruber tree; Produto florestal não madeireiro (PFNM); Seringal Rio Branco; RESEX Chico Mendes; Xapuri (AC); Acre; Western Amazon; Amazonia Occidental; Amazônia Ocidental; Insumos agrícolas; Análisis de costo-beneficio; Productos forestales no madereros; Rentabilidad.; Análisis económico; Seringueira; Análise de custo-benefício; Rentabilidade; Heveicultura; Hevea; Latex; Extração; Borracha; Produção; Insumo; Análise econômica; Caucho.; Nontimber forest products; Economic analysis; Farm inputs; Rubber; Profitability.; Cost benefit analysis.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/503365

Custo e rentabilidade do sistema extrativo para produção de borracha nas reservas extrativistas no Acre, 2004.
Provedor de dados: 14
Autores: SA, C. P. de; OLIVEIRA, E. L. de; NASCIMENTO, G. C. do.
A ocupação do Acre está relacionada ao extrativismo da borracha, atividade econômica que predominou até o início da produção da borracha de cultivo racional, oriunda dos países asiáticos. Este fato comprimiu os preços no mercado internacional, condicionante de competitividade no mercado externo, tornando inviável a exploração comercial dos seringais nativos da Amazônia. A desestruturação do frágil modelo extrativista "barracão" tornou-se inevitável, culminando com a falência da atividade que, aliada aos conflitos pela posse da terra, redundou na expulsão do seringueiro do processo produtivo. Nos últimos anos, atraído pelo incentivo da política de subsídios, observa-se o retorno do seringueiro ao seringal, crescendo o número de famílias envolvidas na...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Ruber tree; Produto florestal não madeireiro (PFNM); RESEX Chico Mendes; Amazônia Ocidental; Acre; Western Amazon; Amazonia Occidental; Xapuri; Insumos agrícolas; Productos forestales no madereros; Rentabilidad.; Análisis de costo-beneficio; Análisis económico; Produção; Rentabilidade; Heveicultura; Seringueira; Hevea; Plantio; Latex; Extração; Borracha; Insumo; Análise econômica; Análise de custo-benefício; Caucho.; Economic analysis; Profitability.; Farm inputs; Nontimber forest products; Rubber; Cost benefit analysis.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/502674

Latex e borracha de mangabeira.
Provedor de dados: 14
Autores: BEKKEDAHL, N.; SAFFIOTI, W.
bitstream/item/69204/1/IAN-BT13.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Mangabeira; Honcornia speciosa.; Borracha; Latex; Mangaba; Tecnologia.; Rubber; Technology.
Ano: 1948
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375690

Nanocomposites: Production of rubber and cellulose nanocomposites.
Provedor de dados: 14
Autores: VALADARES, L. F.
Process for obtaining rubber and cellulose nanocomposites using natural rubber and cellulose nanofibers to produce reinforced elastomeric material.
Tipo: Folders
Palavras-chave: Elastomeric material; Rubber; Cellulose; Nanocomposites; Renewable resources.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133088

Mistura industrial e análise de borracha para fins específicos.
Provedor de dados: 14
Autores: DOWNS, F. L.
Composição e misturas. O manejo da massa misturada. Vulcanização. Provas químicas. Provas físico-mecânicas.
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Analysis.; Análise; Borracha; Química; Tecnologia.; Chemistry; Rubber; Technology.
Ano: 1945
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/387998

Observações sobre a extração de borracha de sapium, de balata de massaranduba e de outras gomas afins.
Provedor de dados: 14
Autores: MONTEIRO, F. P.
bitstream/item/197868/1/FL00298.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Sepium; Massaranduba; Brasil; Balata; Borracha; Extração; Latex; Murupita; Amazonia; Extraction; Rubber.
Ano: 1943
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374265

Role of strain induced crystallization and oxidative crosslinking in fracture properties of rubbers
Provedor de dados: 5
Autores: Le Gac, Pierre-yves; Broudin, Morgane; Roux, Gérard; Verdu, Jacques; Davies, Peter; Fayolle, Bruno.
Tensile properties and crack propagation properties, especially critical strain energy release rate in mode I, GIC, have been used to investigate fracture properties of elastomers and their relationships with microstructure. These investigations were mainly based on a series of comparisons: first, the behaviour of polychloroprene rubber (CR), undergoing stress hardening due to strain induced crystallization (SIC) and oxidative crosslinking (OCL) was compared with that of chlorinated polyethylene (CPE), which undergoes SIC but not OCL, and with a polyurethane based on hydroxyl terminated polybutadiene (PU) which undergoes OCL but not SIC. Comparisons were also made on CR between fracture behaviour at ambient temperature, where SIC occurs and at 100°C where...
Tipo: Text
Palavras-chave: Fracture; Rubber; Oxidation.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00184/29546/27872.pdf

MANAGEMENT STRATEGIES FOR INDONESIAN SMALL-HOLDER RUBBER PRODUCTION IN SOUTH SUMATRA: A BIOECONOMIC ANALYSIS
Provedor de dados: 31
Autores: Purnamasari,   Ririn S.; Cacho,   Oscar J.; Simmons,   Phil.
A simplified version of the BEAM Rubber Agroforestry Model is embedded in a dynamic economic model to examine the impact of uncertainty about prices and climate on decision variables.  Solutions, in terms of optimal levels for decision variables are found using a Monte Carlo stochastic framework.  These solutions were used to derive risk-efficient frontiers corresponding to different levels of the decision variables.  The results underline the importance of including uncertainty in dynamic bioeconomic systems since profits under uncertainty turned out to be quite different from those obtained with prices and climate assumed to be constant.
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomics; Stochastic analysis; Rubber; Indonesia; Production Economics; Risk and Uncertainty.
Ano: 1999
URL: http://purl.umn.edu/12936

FEASIBILITY OF INTEGRATING SHEEP AND CROPS WITH SMALLHOLDER RUBBER PRODUCTION SYSTEMS IN INDONESIA
Provedor de dados: 31
Autores: Deaton,   Brady J.; San,   Nu Nu.
Diversified production systems are considered important tools for stabilizing the income of smallholder rubber producers in Indonesia.  Based on empirical data collected from smallholder rubber producers in the Nucleus Estate Smallholder (NES) development project, estimations were made of the economic feasibility of integrating sheep and selected crops into smallholder rubber production plantations.  The dynamic optimization procedure is used as an evaluation technique.  This study finds that integration of sheep and crops into smallholder rubber production is economically feasible, particularly for those who utilize family labor for hand harvesting grass and grazing sheep.  Integrating sheep alone increases the net present value of future income by 20%....
Tipo: Journal Article
Palavras-chave: Bioeconomic model; Diversification; Dynamic optimization; Indonesia; Rubber; Sheep; Smallholder; Farm Management.
Ano: 1999
URL: http://purl.umn.edu/14727

Nutrient cycling in a RRIM 600 clone rubber plantation
Provedor de dados: 63
Autores: Murbach,Marcos Roberto; Boaretto,Antonio Enedi; Muraoka,Takashi; Souza,Euclides Caxambu Alexandrino de.
Few reports have been presented on nutrient cycling in rubber tree plantations (Hevea brasiliensis Muell. Arg.). This experiment was carried out to evaluate: the effect of K rates on the amount of nutrients transfered to the soil in a 13-year old Hevea brasilensis RRIM 600 clone plantation, nutrient retranslocation from the leaves before falling to the soil, and nutrient loss by dry rubber export. The experiment started in 1998 and potassium was applied at the rates of 0, 40, 80 and 160 kg ha-1 of K2O under the crowns of 40 rubber trees of each plot. Literfall collectors, five per plot, were randomly distributed within the plots under the trees. The accumulated literfall was collected monthly during one year. The coagulated rubber latex from each plot was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Litterfall; Fertilization; Nutrition; Rubber; Nutrient exportation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200021

Genetic transformation of rubber tree
Provedor de dados: 106
Autores: Montoro, P.; Teinseree, N.; Rattana, W.; Tadakittisarn, S.
Palavras-chave: Rubber; Tree.
Ano: 1999
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4998

การเปลี่ยนแปลงของการสังเคราะห์ด้วยแสงสุทธิ การคายน้ำ การเปิดปากใบ และประสิทธิภาพการใช้น้ำในกระบวนการสังเคราะห์ด้วยแสง ของกิ่งยางพาราสายพันธุ์ RRIM 600 ที่ถูกตัด
Provedor de dados: 106
Autores: Auntiporn Keansua; Sukumaporn Sriphadet; Jessada Phattaralerphong.
A study on changes in net photosynthesis (Pn), transpiration (Tr), stomatal conductance (Gs) and photosynthesis water use efficiency (WUE) of cutted rubber branch c.v. RRIM 600. Four methods included, do not put into the water, immediately put the branch into the water after cut, and put into the water after cut 5 and 10 minutes. The comparing of Pn, Tr, Gs and WUE values before and after cut were done. The result were found that Pn, Tr and Gs decrease immediately after branch was cut. The value decreased rapidly in first 15 minutes. Putting the branch into the water immediately, and putting the brance into the water 5 or and 10 minutes after cut expressed that the Pn, Tr, Gs and WUE could restored to the normal value before the branch was cut....
Tipo: PhysicalObject
Palavras-chave: Rubber; Cutted rubber branch; RRIM 600; Photosynthesis; Transpiration; Stomatal conductance; Water use efficiency; Plant physiology analysis; ยางพารา; กิ่งยางพารา; การสังเคราะห์ด้วยแสง; การตอบสนองต่อแสง; การเปิดปากใบ; การคายน้ำ; ประสิทธิภาพการใช้น้ำ; การวิเคราะห์สรีรวิทยาของพืช.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5755

การวางแผนระบบฟาร์มยางพาราในตำบลเสี้ยว อำเภอเมือง จังหวัดเลย
Provedor de dados: 106
Autores: Jirawat Jaroensathapornkul.
Objective of research was to plan the rubber-based farming system in Seaw Subdistrict, Muang District, Loei Province regarding the economically optimal cropping pattern. The researcher utilized a purposive sampling for 3 villages and then a total of 50 farmers were interviewed accidentally with the aid of structured questionnaire. The methods of descriptive analysis as well as linear programming (LP) approach were employed. The LP results were revealed mainly as follow. In the first cropping year, the net on-farm income of rubber based farming systems increased according to the replicated farm. As the result of area allocation, the optimal ratio of cultivated area for the rubber, corn and millet should be 41.20: 22.73: 36.07. Meanwhile, if the farmer would...
Tipo: Collection
Palavras-chave: Rubber; Rubber based farming systems; Inter crop; Linear programming; ยางพารา; ระบบฟาร์มยางพารา; การปลูกพืชแซม; โปรแกรมเชิงเส้น; ระบบฟาร์มจำลอง; ปัจจัยการผลิต; รายได้; ต้นทุนการผลิต; จ.เลย อ.เมือง.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5282

การวิเคราะห์พันธุกรรมระดับโมเลกุลที่เกี่ยวข้องกับอาการเปลือกแห้งในต้นยางพารา (Hevea brasiliensis. Muell. Arg)
Provedor de dados: 106
Autores: Preeya Wansomnuk; Pinich Wangsomnuk; Anunt Poltanee; Wipavadee Rittitum; Yasin Kitijuntaropas.
Tipo: PhysicalObject
Palavras-chave: Rubber; Plant genetic; Molecular genetic; Tapping panel dryness; Scion; Rootstock; ยางพารา; พันธุศาสตร์โมเลกุล; อาการเปลือกแห้ง; เครื่องหมายโมเลกุล; กิ่งพันธุ์; ต้นตอ; ภาคตะวันออกเฉียงเหนือ.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5150

Genetic transformation of rubber tree
Provedor de dados: 106
Autores: Montoro, P.; Rattana, W.; Tadakittisarn, S.; Kanthapura, R.
Palavras-chave: Rubber; Tree.
Ano: 2000
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4996

Anatomical characteristics and enzymes of the sucrose metabolism and their relationship with latex yield in the rubber tree (Hevea brasiliensis Muell. Arg.)
Provedor de dados: 61
Autores: Mesquita,Alessandro Carlos; Oliveira,Luiz Edson Mota de; Mazzafera,Paulo; Delú-Filho,Nelson.
Rubber production is dependent on the availability of carbohydrates in the tissues engaged in latex synthesis. In this study three rubber tree clones were used to study the protein profile, the activities of invertase and sucrose synthase in the latex and anatomical characteristics of the bark, as well as to establish a possible relationship with latex production. The clones used in the study, RRIM 600, GT 1 and Fx2261, differed in latex productivity, from high to low in this order. Although present, few differences were observed in the latex protein profile obtained by denaturing electrophoresis. The activity of neutral invertase was higher than the acidic isoform, and both activities were higher in the most productive clones RRIM 600 and GT 1. The same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hevea brasiliensis; Invertase; Lacticiferous vessels; Latex; Rubber; Sucrose synthase.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200002

Ecophysiological factors underpinning productivity of Hevea brasiliensis
Provedor de dados: 61
Autores: Rodrigo,V.H.L.
High land productivity is a must for any commercial cultivation including Hevea brasiliensis (rubber). Also, the high demand for natural rubber has placed great pressure on expanding rubber cultivation to new and non-traditional areas. Understanding the ecophysiological principles behind the measures of productivity improvements is vital for wide application of these measures and to assess their sustainability. This review discusses the ecophysiological principles and tools used, along with the measures taken, to address productivity needs in terms of: genotype selection, determination of optimum planting density, and establishment of intercropping systems. Breeding for high yields and selection of suitable genotypes for different growing conditions are a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rubber; Genotype selection; Intercropping; Planting density; Physiology.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400002