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Nomenclatura Unesco > (31) Ciencias Agrarias > (3106) Ciencia forestal > (3106.08) Silvicultura

Mostrando recursos 1 - 20 de 1,842

1. Plantation management and bamboo resource economics in China - Troya Mera, Fidel Antonio
Bamboos constitute a very important and versatile resource worldwide. A lot of Asian, African and South American people rely on bamboo products for their housing and farming tools. Meanwhile, the shoots of these plants are regarded as vegetables in East and South-East Asian nations. China is one of the richest countries in the world in terms of bamboo resources and bamboo forests area (extension) as well. This country has the largest number of bamboo species in the world (more than 590 species), many of them with significant economic importance, being Moso bamboo (Phyllostachys edulis), the most important bamboo species in...

2. Effects of silviculture on water quality in Southwestern China - Cole, Jacquelyn
Agricultural nutrient pollution is of major concern throughout the world for its effects on water quality. In silviculture systems, excess and inappropriate fertilizer additions have the potential to cause over-productive waterways and eutrophication. Examining the impacts of slope steepness and runoff volume on water quality parameters (total suspended solids, electrical conductivity, pH, and dissolved oxygen) will allow for a better development of best management techniques for personalized silviculture practices. We assessed the effects of forest ecosystems in southwestern China on surface water quality closely adjacent to these forests. Results implicate a positive significant relationship between three of four water quality...

3. A SUSTENTABILIDADE da cultura do eucalipto: programa 03.
Atualmente, a eucaliptocultura vem ganhando espaço dentre outras atividades, principalmente as pastagens, tornando-se uma alternativa para pequenos e médios agricultores. A Embrapa Monitoramento por Satélite, localizada em Campinas, no interior de São Paulo, utiliza tecnologia dos satélites e levantamentos em campo para avaliação dos impactos da silvicultura em regiões com alta concentração dessa atividade. O objetivo é oferecer subsídios para o planejamento regional e gestão ambiental das propriedades e gerar indicadores de sustentabilidade ambiental que possam ser aplicados em outras propriedades rurais do setor. O eucalipto é recurso renovável, utilizado cada vez mais na geração de energia para o fornecimento...

4. Suitability of close-to-nature silviculture for adapting temperate European forests to climate change - Brang, P.; Spathelf, P.; Larsen, J.B.; Bauhus, J.; Boncina, A.; Chauvin, C.; Drössler, L.; Garcia-Güemes, C.; Heiri, C.; Kerr, G.; Lexer, M.J.; Mason, B.; Mohren, F.; Mühlethaler, U.; Nocentini, S.; Svoboda, M.
International audience

5. Foraging behavioral of Phylloscartes ventralis (Aves, Tyrannidae) in native and planted forests of southern Brazil - Lima, Andre de Mendonca; Hartz, Sandra Maria
Few studies have related the effects of silviculture practices to the behavior of bird species in the Neotropics. The present study examined the foraging behavior of Phylloscartes ventralis (Temminck, 1824) in a native forest and in silviculture areas of Pinus elliotti and Araucaria angustifolia with different structures and ages. We tested two general hypotheses: (1) areas of commercial forest plantation change the foraging behavior of P. ventralis in relation to native forest, and (2) the foraging behavior of P. ventralis in silviculture areas with understories (complex structures) is different from its behavior in areas without understory. The results showed that...

6. Utilisation de photographies hémisphériques sous le couvert forestier guyanais - Gond, Valéry; Baret, Frederic; Ruelle, Boris; Weber, Sacha
 

7. Exportação de carbono e nutrientes pela colheita de Acacia mearnsii De Wild aos quatro anos de idade na Depressão Central, RS - Winckler Caldeira, Marcos Vinicius; Oliveira Godinho, Tiago de; Saidelles, Fabio Luiz Fleig; Viera, Márcio; Schumacher, Mauro Valdir; Chaves Castro, Kallil
The aim of this study was to estimate the content and export of carbon, macro and micronutrients inthe different components (leaf, alive and dead branch, bark, wood and roots) of the Acacia mearnsiitrees with 4 years old of age in Arroio dos Ratos-RS, in order to provide the forest management,based on the criterion of minimum export of nutrients. After determining the diameter distributionand its division into diameter classes (seven classes), three trees were selected in each classes. Usingthe 21 trees felled, the biomass of different components of trees was estimated. It was observed thatwood, which represents about 64% of the...

8. Substratos à base de lodo de esgoto na produção de mudas de Senna alata - Faria, Júlio Cézar Tannure; Winckler Caldeira, Marcos Vinicius; Delarmelina, William Macedo; Lacerda, Leonardo Cassani; Gonçalves, Elzimar de Oliveira
The aim of this study was to evaluate the growth of seedlings of Senna alata using different combinationsof residues, which are: sewage sludge, carbonized rice husk, straw coffee in natura and commercialsubstrate. The experiment was conducted in the Nursery Center for Agricultural Sciences, FederalUniversity of Espírito Santo, and mounted in a completely randomized design. When the seedlingsreached five months growth the following parameters were measured: stem diameter, plant height,ratio between plant height and stem diameter, shoot dry mass, dry mass of root system, total dry mass,ratio of dry mass shoot/root dry mass, ratio of root dry mass/dry mass of shoots...

9. Aménagement forestier et exploitation en forêt tropicale humide guyanaise - Brunaux, Olivier; Demenois, Julien
 

10. Eco-gene, a model for simulation studies on the spatial and temporal dynamics of genetic structures of tree populations - Degen, Bernd; Gregorius, Hans; Scholz, Florian
 

11. Diversité et originalité des modelés forestiers Guyanais - Filleron, Jean-Charles; Le Fol, Jérôme; Freycon, Vincent
 

12. Mechanical analysis of the strains generated by water tension in plant stems. Part I: stress transmission from the water to the cell walls - Alméras, Tancrède; Gril, Joseph
 

13. Les équipements d'investigation du Gis Silvolab-Guyane - Weigel, Jean; Julliot, Catherine; Petronneli, Pascal
 

14. Comparison of physical and mechanical properties of tension and opposite wood from ten tropical rainforest trees from different species - Ruelle, Julien; Beauchene, Jacques; Thibaut, Anne; Thibaut, Bernard
 

15. Régénération forestière naturelle : de la graine à la jeune tige - Baraloto, Christopher
 

16. Télédétection et aménagement forestier tropical : les pistes d'exploitation - Gond, Valérie; Féau, Christian; Pain-Orcet, Michelle
 

17. Le rôle de la faune sur la régénération forestière naturelle - Charles-Dominique, Pierre
 

18. Mechanical analysis of the strains generated by water tension in plant stems. Part II: strains in wood and bark and apparent compliance - Alméras, Tancrède
 

19. Colour and decay resistance and its relationships in Eperua grandiflora - Amusant, Nadine; Fournier, Meriem; Beauchêne, Jacques
 

20. Genetic variation for growth, morphological, and physiological traits in a wild population of the Neotropical shade-tolerant rainforest tree Sextonia rubra (Mez) van der Werff (Lauraceae) - Scotti, Ivan; Calvo-Vialettes, Leticia; SCOTTI-SAINTAGNE, Caroline; Citterio, Maurizio; Degen, Bernd; Bonal, Damien
 

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