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84 resultados encontrados para: TEMA: Plantaciones forestales
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1.
- Capítulo de libro con arbitraje
*Solicítelo con su bibliotecario/a
La importancia de la sombra del café en la productividad, la roya y los servicios ambientales
Soto Pinto, Lorena (autora) (1958-) ;
Contenido en: Caminar el cafetal: perspectivas socioambientales del café y su gente / Eduardo Bello Baltazar, Lorena Soto Pinto, Graciela Huerta Palacios y Jaime Gómez Ruiz (editores) San Cristóbal de Las Casas, Chiapas, México El Colegio de la Frontera Sur : Juan Pablos Editores, 2019 página 33-48 ISBN:978-607-8429-75-2 :: 978-607-711-548-9
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
59903-10 (Disponible)
Disponibles para prestamo: 1
Nota: Solicítelo con su bibliotecario/a

2.
Libro
Introduction to forestry and agroforestry / K.T. Parthiban, N. Krishnakumar, M. Karthick
Parthiban, K. T. (autor) ; Krishnakumar, N. (autor) ; Karthick, M. (autor) ;
Jodhpur, Rajasthan, Indian : Scientific Publishers , 2019
Clasificación: 634.9 / P3
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010019804 (Disponible)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

The Scientific Forestry and the associated management practices received significant attraction around the world which resulted in the birth of professional forestry education. In India, the professional forestry education was started in the year 1985 and currently offered at several State Agricultural and Central Universities. The Forestry and Agroforestry has also been incluzed as a subject in various under graduate and Post graduate program of State Agricultural and other conventional universities. This professional education in forestry and introduction of forestry courses to other degree programmes demand a comprehensive text book encompassing all the facets of forests. Against this backdrop, the current book on Introduction To Forestry & Agroforestry is conceived to cater to the needs of professionals in B. Sc (Forestry), B.Sc (Agriculture), B.Sc. (Horticulture) and B.Sc (Sericulture) courses offered at State Agricultural Universities and undergraduate programme of Botany and Environmental Science courses offered at Conventional Universities. Besides, the book can also act as a fast and ready made reference material for the graduates aspiring for State and Central Forest Service Examinations. For any beginner in professional forestry education and competitive examinations, this book will be an asset to understand and learn the principles and practices of forestry coupled with other recent developments in forestry sector.

Índice

1. Forests and Forestry
• Definitions of terminologies
• Historical background of forests
• Objectives of forestry
• Role of forests - Productive, Protective & Ameliorative
• Reasons for declining forest cover
2. Forest Classification and Types
• Forest Types – Definition
• Classification of forest
o Regeneration
o Age
o Composition
o Ownership
o Object of Management
o Growing stock
• Classification of forest based on vegetation and climate
• Factors influencing forest vegetation
3. The State of World’s Forest
• Geographical distribution of world forest
• Classification of world forest
• Productivity potential of world forest
• Increment of world forest
4. Forest Resources of Important Countries. . • Forest resources and practices of world
o Western Europe
o North America
o Central Africa
o Australia
o Central America
o Russia
o Japan
o China
5. The State of Indian Forest
• Forest cover Measurement
• State wise forest distribution
• Growing stock of Indian forest
6. Silviculture - Principles and Practices
• Silvics and Silviculture
• Objectives
• Regeneration - Natural and artificial
• Nursery technology
• Silvicultural practices
7. Silviculture of Commercially Important Trees
• Eucalyptus
• Casuarina
• Teak
• Ailanthus
• Melia
• Subabul
• Sandal
• Redsander
• Kadam
• Poplar
8. Forest Mensuration
• Definition
• Objectives
• Diameter Measurement
• Height Measurement
• Measurement of tree form
• Volume estimation
9 Forest Utilization - Wood and Wood Products
• Definition
• Wood Product
o Solid wood
o Composite wood
• Non-Wood Forest Products
o Fibres
o Flosses
o Grasses
o Bamboos and canes
o Tan,
o Gums
o Dye
o Resin
o Oleoresin
o Essential oils
o TBOs

o Animal Product
10 Agroforestry
• Definition
• Classification and types
o Agrisilviculture o Silvipasture
o Agrisilvipasture
o Other systems
• Benefits and Limitation
• Tree crop interaction
o Above ground interaction
o Below ground interaction
• Nutrient cycling
• Agroforestry systems for different ecological zones
• Industrial Agroforestry
• National Agroforestry Policy, 2014
11 Social Forestry
• Introduction
• Objectives
• Programmes
12. Joint Forest Management (JFM)
• Introduction
• History and evolution
• Objectives
• Programmes
• JFM success Stories
o Arabari experience
o Behroonguda experience
13. Dendro Energy Resources
• Definition
• Use the Energy in Biomass
• Sources of Dendro biomass (Raw materials)
• Types of biomass power generation
• Thermo chemical properties of important energy species
• Benefits of dendro energy
14. Global Warming
• Introduction
• Green House Gases
• Causes and Effects
• Impacts
• Mitigation Measures
• Adaptation Measures
15. Carbon Sequestration
• Definition
• Important Terminologies and Definitions
• Kind of Sequestration
• Methods of sequestration
• C Sequestration potential of Natural forest
o Global Carbon Stock
o India’s Carbon stock
• C Sequestration potential of Agroforestry
16. Forest Based Industries
• Major wood based industries
• Wood demand for major industries
• Wood production
• Wood consumption
• Raw material and species
17. Organizations in Forestry
• National Organizations -
o ANFPDC, FSI, ICFRE, AWBI, BSI, CAFRI, CZA, CSE, CRIDA, FRI, ICAR, IPIRTI, IGNFA, KFRI, NBA, NBW, NTCA, WCCB, ZSI, WTI
• International Organizations
o CIFOR, ITTO, World Agroforestry Centre (ICRAF), IUCN, WWF, IUFRO, INBAR, FSC, FAO, IPCC

18. Forestry Events / Dates
• Important Events/Dates related to Forestry
• Important Events / Dates related to environment
• Themes and philosophy
19. ACTS and Policies
• National Forest Policies - 1894, 1952, 1988
• Salient features
• Important Acts in Indian Forests
o IFA, 1927 and its amendments
o WPA, 1972 and its amendments
o FCA, 1980 and its amendments
o EPA, 1986 and its amendments o Biodiversity Act, 2002
o Tribal Act, 2006
Abbreviations
References


3.
- Capítulo de libro sin arbitraje
Uso de árboles maderables en zonas rurales de La Chontalpa
Zamora Cornelio, Luis Felipe (autor) ;
Contenido en: La biodiversidad en Tabasco. Estudio de estado / coordinación y seguimiento general: Andrea Cruz Angón, Jorge Cruz Medina, Jessica Valero Padilla, Flor Paulina Rodríguez Reynaga, Erika Daniela Melgarejo Distrito Federal, México : Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, 2019 Vol. I, página 223-227 ISBN:978-6078570201 (Vol. I)
Bibliotecas: Villahermosa
Cerrar
SIBE Villahermosa
37089-10 (Disponible)
Disponibles para prestamo: 1

Resumen en: Inglés |
Resumen en inglés

Evapotranspiration and energy partitioning are complex to estimate because they result from the interaction of many different processes, especially in multi-species and multi-strata ecosystems. We used MAESPA model, a mechanistic, 3D model of coupled radiative transfer, photosynthesis, and balances of energy and water, to simulate the partitioning of energy and evapotranspiration in homogeneous tree plantations, as well as in heterogeneous multi-species, multi-strata agroforests with diverse spatial scales and management schemes. The MAESPA model was modified to add (1) calculation of foliage surface water evaporation at the voxel scale; (2) computation of an average within-canopy air temperature and vapour pressure; and (3) use of (1) and (2) in iterative calculations of soil and leaf temperatures to close ecosystem-level energy balances. We tested MAESPA model simulations on a simple monospecific Eucalyptus stand in Brazil, and also in two complex, heterogeneous Coffea agroforests in Costa Rica. MAESPA satisfactorily simulated the daily and seasonal dynamics of net radiation (RMSE=29.6 and 28.4Wm−²; R²=0.99 and 0.99 for Eucalyptus and Coffea sites respectively) and its partitioning between latent-(RMSE=68.1 and 37.2Wm−²; R²=0.87 and 0.85) and sensible-energy (RMSE=54.6 and 45.8Wm−²; R²=0.57 and 0.88) over a one-year simulation at half-hourly time-step.

After validation, we use the modified MAESPA to calculate partitioning of evapotranspiration and energy between plants and soil in the above-mentioned agro-ecosystems. In the Eucalyptus plantation, 95% of the outgoing energy was emitted as latent-heat, while the Coffea agroforestry system’s partitioning between sensible and latent-heat fluxes was roughly equal. We conclude that MAESPA process-based model has an appropriate balance of detail, accuracy, and computational speed to be applicable to simple or complex forest ecosystems and at different scales for energy and evapotranspiration partitioning.


5.
Artículo
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TRUE GRASP: actors visualize and explore hidden limitations of an apparent win-win land management strategy in a MAB reserve
Braasch, Marco ; García Barrios, Luis Enrique (coaut.) ; Cortina Villar, Héctor Sergio (coaut.) (1960-) ; Huber Sannwald, Elisabeth (coaut.) ; Ramírez Marcial, Neptalí (coaut.) (1963-) ;
Contenido en: Environmental Modelling & Software Vol. 105 (July 2018), p. 153-170 ISSN: 1364-8152
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Resumen en: Inglés |
Resumen en inglés

Win-win solutions might be short-lived. Government permission for smallholder farmers to extract and sell resin from a pine savanna biosphere-reserve in Mexico has settled a long dispute among different stakeholders in the short-term; however, forest production and conservation beyond 20 years are compromised due to low pine recruitment caused by competition with exotic grasses. Grass control practiced by farmers through grazing and fire has previously been discouraged by conservation authorities, which inadvertently limits long-term pine conservation and use. We describe the participatory design, rationale and simulation attributes of an educational, interactive, agent-based model that explores suites of management options and their economic and ecological outputs. We present and analyze the outcomes of four simulation workshops, where farmers and external-actors better grasped the complex ecological interactions involved in conserving and using pines in grazed pine savanna with exotic grasses, and discussed these findings with a long-term vision and tradeoff analysis approach.


6.
- Artículo con arbitraje
Density management diagram for teak plantations in Tabasco, Mexico
Minoche, Djhon (autor) ; Risio Allione, Lucía (coaut.) ; Herrero De Aza, Celia (coaut.) ; Martínez Zurimendi, Pablo (coaut.) ;
Contenido en: IForest. Biogeosciences and Forestry Vol. 10 (December 2017), p. 909-915 ISSN: 1971-7458
PDF
Resumen en: Inglés |
Resumen en inglés

Density management diagrams are valuable tools for managing specific forest species. The aim of this study was to obtain a density management diagram for teak (Tectona grandis L.) plantations in the State of Tabasco in Mexico. To achieve this objective, a set of 10 plantations were studied, in which 42 plots were established. Two equations were fitted simultaneously, including one related to the quadratic mean diameter, stand density and dominant height and the other which related the total stand volume to the quadratic mean diameter, stand density and dominant height. The results showed that the diagram had an acceptable predictability, thus indicating its usefulness and accuracy in planning silvicultural interventions. This diagram is a very powerful tool that can enable stakeholders to manage teak plantations in the State of Tabasco.


7.
- Artículo con arbitraje
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Development of an Ideotype-Based selection tool for native tropical tree breeding by smallholder planters in mexico’s maya forest
Solis Guillén, Isabel ; Chaires Pacheco, Mariana (coaut.) ; Juárez Gómez, Juan (coaut.) ; O’Connor Sánchez, Aileen (coaut.) ; Peña Ramírez, Yuri Jorge Jesús (coaut.) ;
Contenido en: Small-scale Forestry Vol. 16, no. 4 (December 2017), p. 521–534 ISSN: 1873-7854
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Resumen en: Inglés |
Resumen en inglés

Tree planters of the Yucatan peninsula in México are mostly first-generation small-scale forest owners. As a consequence of the lack of a management plan, trees employed for plantations are currently produced without any traceability or genetic improvement protocol, resulting in the reduced quality and heterogeneity of established materials. Recently, the Mexican government published a law to force planters to reverse this situation through the initiation and operation of germplasm management and traceability programs within each physiographic sub-province. Thus, planters located in the “Campeche Karts sub-provenance” now need to select superior trees for plant production, provenance assays, and orchard establishment. As a reference for the improvement goals in this work, we developed a model ideotype tree and qualification tool based on a weight-free selection index to compare trees in established plantations to enable the effective selection of superior trees to be used as seed sources and as a starting population for genetic improvement programs. The tool presented here is easy to use by planters, requiring a very basic computer or smartphone to run a spreadsheet where simple morphometric evaluation are captured, trees are qualified in comparison to the ideotypic values of each parameter with the aid of common field equipment. When this tool was applied to individuals from two different plantations, the qualification methodology ranked the individuals, allowing for the selection of superior trees in a more robust way, in contrast to the use of parameters mostly based on price and driven by wood volume.


8.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

In agroforestry systems, shade trees strongly affect the physiology of the undergrown crop. However, a major paradigm is that the reduction in absorbed photosynthetically active radiation is, to a certain extent, compensated by an increase in light-use efficiency, thereby reducing the difference in net primary productivity between shaded and non-shaded plants. Due to the large spatial heterogeneity in agroforestry systems and the lack of appropriate tools, the combined effects of such variables have seldom been analysed, even though they may help understand physiological processes underlying yield dynamics. In this study, we monitored net primary productivity, during two years, on scales ranging from individual coffee plants to the entire plot. Absorbed radiation was mapped with a 3D model (MAESPA). Light-use efficiency and net assimilation rate were derived for each coffee plant individually. We found that although irradiance was reduced by 60% below crowns of shade trees, coffee light-use efficiency increased by 50%, leaving net primary productivity fairly stable across all shade levels. Variability of aboveground net primary productivity of coffee plants was caused primarily by the age of the plants and by intraspecific competition among them (drivers usually overlooked in the agroforestry literature) rather than by the presence of shade trees.


9.
Artículo
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Resumen en: Español | Inglés |
Resumen en español

En las plantaciones de hule (Hevea brasiliensis Müell. Arg.) el tallo del árbol se divide para su aprovechamiento en partes longitudinales simétricas, denominadas “tablero de pica”. El tablero bajo inicia a 1.0 m sobre el nivel del suelo, en forma descendente y el tablero alto a 1.5 m sobre el suelo, en forma ascendente. En México las plantaciones se aprovechan por 25 años, pero el 30 % de ellas puede aprovecharse más tiempo, usando el tablero alto. Para estas plantaciones se aplica el corte de los vasos laticíferos (pica) ascendente en el tablero alto para alargar el ciclo productivo del árbol. El objetivo de este estudio fue conocer la producción de hule del tablero alto en plantaciones en edad productiva, estimulando con ethrel al 5 %, en tres frecuencias de pica, una, dos o tres por semana. La hipótesis fue que aplicando pica ascendente en tablero alto con estimulación de ethrel se puede prolongar la vida útil de las plantaciones dado que hay buena producción. Los tratamientos fueron pica ascendente en cuarto de espiral cada seis días, una pica por semana (¼ S ↑ d6 6d/7), cada tres, dos picas por semana, (¼ S ↑ d3 6d/7) y cada dos, tres picas por semana (¼ S ↑ d2 6d/7), estimuladas con ethrel, más las mismas frecuencias sin estimular como testigos. El diseño experimental fue parcelas divididas con una modificación en número de repeticiones del testigo, usando el material disponible, asignando al azar los tratamientos en cada parcela. Los datos se analizaron como modelo lineal mixto.

Los rendimientos mayores (52 % más, respecto a la misma frecuencia sin estimular) se obtuvieron en plantaciones de 28 años en frecuencia de pica dos veces por semana estimulada con ethrel, y le siguió la frecuencia de pica tres veces por semana (32 % más, respecto a la misma frecuencia de pica testigo). En plantaciones de 20 años las frecuencias de pica dos y tres veces por semana, estimuladas con ethrel, no presentaron diferencias significativas con las mismas frecuencias de pica sin estimular.

Resumen en inglés

In rubber (Hevea brasiliensis Müell. Arg.) plantations the stem of the tree is divided for its use in symmetric longitudinal sections, known as “tapping panel”. The lower panel begins at 1.0 m above ground level, in descending form and the high panel at 1.5 m above the ground, in ascending form. In Mexico the plantations are exploited for 25 years, but 30 % of them can be exploited for a longer period of time, by utilizing the high panel. For these plantations the cut of the ascending laticiferous vesicles (tap) is made in the high panel to lengthen the productive cycle of the tree. The objective of our study was to know the rubber production of the high panel in plantations of productive age, stimulating with ethrel at 5 %, in three tapping frequencies, one, two or three per week. The hypothesis was that by applying upward taps in the high panel with ethrel stimulation, the useful life of the plantations can be extended given that there is good production. The treatments were upward taps in quarter spiral every six days, one tap per week (¼ S ↑ d6 6d/7), every three, two taps per week, (¼ S ↑ d3 6d/7) and every two, three taps per week (¼ S ↑ d2 6d/7), stimulated with ethrel, plus the same frequencies without stimulation as controls. The experimental design consisted of plots divided with a modification in the number of replications of the control, utilizing the available material, and randomly assigning the treatments in each one of the plots. The data were analyzed as a mixed linear model.

The highest yields (52 % higher, with respect to the same frequency without stimulation) were obtained in plantations of 28 years of age in a tapping frequency of twice a week stimulated with ethrel, followed by a tapping frequency of three times a week (32 % higher, with respect to the same frequency of the control). In plantations of 20 years the tapping frequencies of two and three times per week, stimulated with ethrel, did not present significant differences with respect to the same frequencies without stimulation.


10.
- Capítulo de libro con arbitraje
Los acahuales mejorados. Una práctica agroforestal innovadora de los maya tseltales
Soto Pinto, Lorena (autora) (1958-) ; Anzueto Martínez, Manuel de Jesús (coaut.) ;
Disponible en línea
Contenido en: Etnoagroforestería en México México, D. F. : Universidad Nacional Autónoma de México. Escuela Nacional de Estudios Superiores Unidad Morelia. Instituto de Investigaciones en Ecosistemas y Sustentabilidad, 2016 p. 221-235 ISBN:978-607-01-8641-4
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
58183-10 (Disponible)
Disponibles para prestamo: 1
PDF
Resumen en: Español | Inglés |
Resumen en español

En la zona maya tseltal, un grupo de productores del municipio de Chilón, Chiapas, desarrolló una innovación agroforestal basada en la milpa tradicional: el acahual mejorado. Este sistema consistió en el enriquecimiento del acahual o barbecho mediante la propagación en franjas de especies nativas pertenecientes a la vegetación natural de alto valor maderable. El objetivo de este estudio fue caracterizar y evaluar tal sistema en el ejido Bachajón. Se seleccionaron 17 parcelas en una cronosecuencia de 4 a 16 años después del establecimiento de árboles. Se realizaron inventarios forestales, muestreos de suelo, composición y densidad de plantas herbáceas, cantidad de hojarasca y de ramas caídas. Se realizaron regresiones entre la edad de la parcela y las siguientes variables de respuesta: densidad de árboles y juveniles, diámetro de los árboles, biomasa arriba del suelo, carbono en la biomasa arriba del suelo, materia muerta, porcentaje de nitrógeno del suelo, compactación, pH, volumen y valor de la madera (polinómicas). A los 16 años se registraron 57 especies, más del 80% con al menos un uso. La hojarasca, el volumen y el valor de la madera se incrementaron significativamente con el tiempo a lo largo del periodo evaluado. En los primeros 9 años el carbono mostró una acumulación anual de 12.6 ton ha-1. Los acahuales mejorados aumentaron la productividad del sistema, la hojarasca, el carbono en biomasa viva, el volumen de madera y su valor económico. Se prevé que de seguir un enriquecimiento constante y un manejo semi-intensivo, el sistema podría mantenerse a largo plazo ofreciendo productos y servicios ecosistémicos.

Es posible que se requiera algún manejo del suelo con abonos verdes ya que la tendencia positiva del nitrógeno en el tiempo no fue significativa. Este sistema no sustituye a los acahuales tradicionales ni a la etapa agrícola del maíz, por el contrario, se complementa con ellas, agregando valor económico, funciones ecosistémicas y evitando el uso del fuego.

Resumen en inglés

In the Tseltal Maya region, a group of small farmers of the Municipality of Chilón, Chiapas, developed an agroforestry innovation, based on the traditional rotational milpa: the improved fallow. This system consisted of enriching with native species of high value timber among stripes of secondary natural vegetation established during the fallow stage of the plot. This study aimed to characterize and evaluate the system in the Ejido Bachajón. Seventeen farmer plots were selected in a chronosequence of 4-16 years after the tree establishment. Forest inventories, as well as sampling of soil, abundance of herbs, and amounts of litter and fallen branches were performed. Regressions between the age of the plot and the following variables were performed: tree and sapling density, tree diameter, aboveground biomass, carbon content in aboveground biomass, dead matter, soil N percentage, compaction, pH, timber volume and timber present value (polinomial). Fifty seven species were recorded along 16 years of establishment, 80% had at least one use. Litter amount, timber volume and economic value increased significantly throughout the entire evaluation period. In the first nine years avobeground biomass and C increased. This last, showed an annual accumulation of 12.6 t ha-1. The improved fallow system increased productivity, litter amount, carbon in living biomass, timber volume and economic value. It is possible expecting that if a constant enrichment and semi-intensive management continue, the system could be maintained in the long term offering products and ecosystem services. It is possible that soil management with green manures may be required since the nitrogen positive trend over time was not significant. This system does not replace traditional fallows and the stage of maize production; for the contrary, it complements them, adding economic value, ecosystem functions and avoiding the use of fire.