MANEJO DE FLORESTA OMBRÓFILA MISTA PELO MÉTODO DE LIOCOURT, MUNICÍPIO DE PAINEL, SCRESUMO: Objetivou-se, neste trabalho, conhecer a distribuição diamétrica e calcular o valor do quociente 'q' de Liocourt da espécie Araucaria angustifolia (Bertol.) Kuntze em floresta natural, bem como avaliar os índices de competição em um fragmento com área de 74,2 ha. Para tanto, foi utilizado o método de área fixa com parcelas permanentes de 400 m², totalizando um hectare de área amostral. Em todas as parcelas, foram medidos os indivíduos com DAP ≥ a 10 cm e, posteriormente, distribuídos em classe diamétrica para ajuste da função de probabilidade de densidade e determinação de índice de competição. A floresta apresentou uma densidade de 228 árvores por hectare e área basal de 19,49 m² . ha -1 . O valor do quociente 'q' para a floresta foi de 1,1, indicando que as taxas de mortalidade e recrutamento encontram-se em equilíbrio. Os índices de competição calculados indicaram que a floresta apresenta-se em estágio de competição. ARAUCARIA FOREST MANAGEMENT BY THE LIOCOURT METHOD, PAINEL MUNICIPALITY, SCABSTRACT: The aim of this study was to describe the diameter distribution and calculate the value of the Liocourt quotient 'q' for the species Araucaria angustifolia (Bertol.) Kuntze in natural forest, as well as evaluating competition indexes in a fragment with an area of 74.2 ha. Fixed area sample plots of 400 m² were used in this study, totaling one hectare sampling area. Trees with DBH ≥ 10 cm were measured in all plots and later distributed in diameter classes for the calculation of the density probability function and competition index. The forest showed a density of 228 trees per hectare and basal area of 19.49 m² . ha -1 . The value of the "q" quotient for the forest was 1.1, indicating that the recruitment and mortality rates are in equilibrium. The calculated competition indices showed that the forest is in a competition stage, with Glover and Holl index of 0.9798 and 0.7069 m² for the BAL mod .

Forest management is the legal instrument to propose interventions and conservation of tree species in natural forests; it is a requirement for the management of commercial forest plantations. Considering as objective the conservation with sustainable management and knowledge of the increment rates in forests with Araucaria angustifolia, growth models were fitted with the measures of ring increment data of 587 trees, covering all distribution diameter classes, in four sites in southern Brazil. These fitted models showed the minimum cutting diameter of 40 cm for about 20 years (maximum annual increment in volume), cutting diameter of 55 cm in 37 years (maximum annual mean volume increment) and cutting cycle of 2 to 22.5 years for the diameter classes. The current increment rates in these diameter classes showed the need for approximately 20 years for the species to reach the minimum logging diameter. The lower growth rate in smaller diameter classes indicates that the species requires more time to reach the minimum cutting diameter, which is detrimental to the forest structure. The growth rate variability must be considered in the management of forests with A. angustifolia. The results showed the need and viability of sustainable silvicultural interventions to preserve forest diametric structures; otherwise the forest could compromise the development of larger trees. Keywords: Growth, forest production, araucaria forest. ResumenManejo forestal para la conservación de Araucaria angustifolia en el sur de Brasil. El manejo forestal es el instrumento legal para proponer intervenciones y conservación de especies en bosques naturales, siendo un requisito para la ordenación de la producción forestal. Con el objetivo de promover la conservación con gestión sostenible y conocer las tasas de incremento de bosques con Araucaria angustifolia, se ajustaron modelos de crecimiento con las medidas del incremento de anillos obtenidos de tarugos en 587 árboles, cubriendo la distribución de las clases de diámetro en cuatro sitios del sur de Brasil. El ajuste demostró: diámetro mínimo de corte de 40 cm alrededor de 20 años (máximo incremento corriente anual en volumen), diámetro límite de corte de 55 cm en 37 años (máximo incremento medio anual en volumen) y ciclo de corte de 2 a 22,5 años entre las clases de diámetro. La dinámica actual de la tasa de incremento entre las clases de diámetro mostró la necesidad de aproximadamente 20 años para que la especie alcance el diámetro mínimo de corte. La tasa de crecimiento menor en las clases diamétricas más pequeñas indica que la especie requiere más tiempo para alcanzar el diámetro mínimo de corte, que es perjudicial a la estructura del bosque. Los resultados sugieren que el manejo forestal en bosques de araucaria debería considerar la variabilidad de las tasas de crecimiento. Además, los resultados demuestran la viabilidad y necesidad de una intervención silvícola sostenible para conservar la estructura diamétrica, de lo contrario el bosque podría comprometer el desarrollo de una...

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6 RESUMO ABSTRACTA Cordia americana (Linnaeus) Cordia americana (Linnaeus) Gottshling & J.E. Mill is used in forest restoration to recover degraded areas and riparian forest, therefore, it is important to know the quality of seedlings produced in nurseries. Thus, the present study aims to predict the Dickson quality index in Cordia americana seedlings under different arrangement conditions. The design was conducted in a protected environment in a randomized block design, in which two sizes (90 and 170 cm³) of the tube and two densities were tested, totaling four combinations. The following morphological parameters were evaluated: plant height, stem diameter, leaf phytomass, stem and root, leaf area, and Dickson quality index. Plant growth was influenced significantly by the volume of the tube and density of plants throughout the evaluation period of the experiment. The container with 170 cm³ volume and 50% density was the highest IQD produced plants with best quality.GottshlingPALAVRAS-CHAVE: Adensamento de plantas, Área foliar, Guajuvira, Índice de Dickson.

RESUMO ABSTRACTA área foliar apresenta estreita relação com a interceptação da energia solar. Dessa forma, o objetivo do presente estudo foi avaliar a área foliar e o índice de área foliar em mudas The leaf area is closely related to the interception of solar energy. Thus, the aim of this study was to evaluate the area and leaf area index in Cordia americana seedlings when submitted to different growing conditions, container volumes (90 and 170 cm³), and crop density (50 and 100% tray load). The design was randomized blocks in a factorial scheme 5 x 2 x 2, with five replications and 10 plants evaluated in each sample unit. Five evaluations were performed at 20-day intervals starting 60 days after emergence. The biophysical parameters evaluated were leaf area and leaf area index. With the results, it was verified that only the tube volume influences the leaf area, being of 177.3 cm² for the tube of 170 cm³ cultivated in density of 100%. The leaf area index was influenced by the tube volume and density of plants, where the highest value was 5.76 for the tube of 90 cm³ in culture with 100% of density. The 100% density management influenced positively the growth of area and leaf area index.PALAVRAS-CHAVE: Guajuvira, Manejo de plantas, Volume de recipiente.

The objective of this study was to perform and evaluate the modeling for individual and aboveground components of biomass and carbon in palm crops by independent and simultaneous estimation in different cultivation ages. The data collection was performed in a commercial pam crop in Taperoá, state of Bahia. Five models were tested and the best one was chosen based on statistical criteria of adjusted R2, Syx (%), AIC and graphical analysis of the residuals for independent adjustments and the best equations for each component were adjusted simultaneously. Biomass and carbon showed good correlation with the stipe height and total height, which was identified by path analysis. The simultaneous estimation demonstrated satisfactory results in the statistical criteria when compared to the independent estimates, being it total or by compartments.

Silvicultural interventions are necessary to control the competition and to maintain the forest structure. Thus, this work aimed to know the interactions between dendro/morphometric variables to indicate density interventions in Brazilian pine Forest. Dendrometric and morphometric variables were measured from 186 individual trees of this species, which were distributed in diametric classes at three sites. With the variables were fitted models for the relationships between the degree of slenderness and the potential crown diameter as a function of the number of trees per hectare. The fit indicated that the variables showed interaction and the relationship can be described by linear function explaining between 51.9 and 99.3% of the variance between morphometry and forest density. This adjustment and information can be used to indicate the optimum density according to the amplitude of each index. The results show that the morphometric indexes and their interaction indicate the period of the interventions, having relation with the characteristics of the site, the diametric structure and the dynamics of the forest growth.

Studies on morphology and occupancy area of trees provide knowledge on features and functions of forest ecosystem, especially in terms of competition and growth of trees. The main purpose of this work was to develop models for shape and size relationships of Araucaria angustifolia in natural forest remains of species. Dendrometric and morphometric variables from 210 trees from three sites were used. Results showed that the species present different shape and size, vigor and productive capacity in evaluated sites. Fitted models indicated that there was transition in competition mode (symmetric or asymmetric) for resources, which is result of available growing space for trees. Relationship between shape and size is derived from slope of regression line and regarded as an indication of need for silvicultural interventions to reduce competition, which is a key information for obtaining better practices in forest management.