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| Rocha, Karen Janones da; Souza, Édila Cristina de; Favalessa, Cyro Matheus Cometti; Caldeira, Sidney Fernando; Martinez, Diego Tyszka; Brondani, Gilvano Ebling. |
| This study was conducted in one region of a Seasonal Semideciduous Forest located in Tapurah (Mato Grosso State, Brazil) with the aim of studying its floristic and structural composition. The fixed area method was applied to 10 × 250 m clusters, allocating and measuring five clusters with five subunits of 500 m² each. Species with a diameter at breast height greater than or equal to 10 cm were considered, and the sample sufficiency of the floristic survey was verified by a species accumulation curve. The similarities between the sample subunits were calculated by the Jaccard Similarity Index, and the species diversity with the Shannon Diversity Index and Pielou Evenness Index. The horizontal vegetation structure was characterized by density, frequency,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bootstrap; Phytosociology; Environmental disturbance.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32543 |
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| Favalessa, Cyro Matheus Cometti; Ubialli, Jaime Antônio; Caldeira, Sidney Fernando; Drescher, Ronaldo; Acosta, Fidel Cándano. |
| O objetivo desse estudo foi comparar a acurácia das estimativas dos volumes ao longo do fuste de Tectona grandis L.f propiciadas por ajustes de modelos polinomiais segmentados e não segmentados, para um povoamento na região Centro-Sul de Mato Grosso. Foram cubadas 114 árvores de Tectona grandis, pela metodologia de Hohenadl com 16 seções. Os modelos não segmentados testados foram o do quinto grau proposto por Schöepfer em 1966 e o de Haradetzky de 1976 e os modelos segmentados, foram o de Max e Burkhart de 1976 e de Clark et al. de 1991. A acuracia dos modelos foi avaliada pelo desvio, desvio padrão das diferenças, somatório de quadrado dos resíduos relativos e a porcentagem dos resíduos. A equação do quinto grau é a mais acurada na estimativa dos volumes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teca; Classe diamétrica; Hohenadl; Afilamento Teak; Diameter class; Hohenadl; Taper. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/325 |
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| Favalessa, Cyro Matheus Cometti; Ubialli, Jaime Antônio; Caldeira, Sidney Fernando; Drescher, Ronaldo. |
| The aim of this study was to compare the accuracy of the non-segmented polynomial models of Fifth degree and Hradetzky from 1976 and the segmented models of Max and Burkhart from 1976 and Clark et al. from 1991, in estimating diameters along the stem of Tectona grandis L.f., with adjustments for the full set of data and by diameter class in a 16 years old stand in the center–southern region of Mato Grosso State, Brazil. The database consisted of 114 trees, scaled by the modified Hohenadl method and distributed in diameter classes. The models adjustments were evaluated according to the adjusted coefficient of determination, standard eError of estimate and distribution of residuals. The accuracy of the models along the stem was evaluated by deviation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teak; Bole form; Rigorous tree scaling; Diameter classes; Models Tectona grandis; Forma do fuste; Cubagem rigorosa; Classes de diâmetro; Modelos polinomiais. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/320 |
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| Pelissari, Allan Libanio; Caldeira, Sidney Fernando; Santos, Vanderley Severino dos; Santos, Joilson Onofre Pereira dos. |
| The objective of this study was to investigate the spatial correlations of soil chemical attributes with the development of teak (Tectona grandis) in the city of Nossa Senhora do Livramento, Mato Grosso State, Brazil. It was allocated 46 permanent plots of 15 m x 30 m. From the stand it was obtained the mean annual values of diameter at 1.3 m above the ground and total height of second to ninth years of age. Soil samples from 0 to 0.20 m depth were also obtained at the second year, to determine pH, calcium, magnesium and aluminum, phosphorus and potassium for subsequent modeling of spatial patterns by geostatistics. The diameter at 1.3 m and the total height of teak present higher spatial correlation with the chemical soil attributes pH and calcium, low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tectona grandis Spatial variability Geoestatistic Kriging Recursos Florestais; Engenharia Florestal; Silvicultura; Geociências Tectona grandis Variabilidade espacial Geoestatística Krigagem. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/367 |
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