10 documents found, page 1 of 1

Qualidade do solo num sistema agroflorestal submetidos a diferentes tipos de ge...

Os sistemas agroflorestais (SAFs) consistem na combinação de espécies arbóreas e produções agrícolas e/ou animal, buscando a otimização do espaço e a pluralidade produtiva. O objetivo deste estudo foi avaliar dois indicadores físicos de qualidade do solo, sendo, humidade e resistência mecânica do solo à penetração (RP), em uma área gerida e não gerida de um SAF, localizado no sudoeste do Paraná, Brasil. O tipo ...

Genetic variability of Araucaria angustifolia Bertol. initial growth: subsidy t...

The species Araucaria angustifolia Bertol. is native from Brazil, and it is now an endangered species due to the anthropic actions for several years. The objective of this study was to evaluate the genetic variability of Araucaria angustifolia based on initial growth qualitative and quantitative variables in a provenance and progeny test. Based on this performance, the genotypes with higher presence of superior...

Physical soil quality in silvopastoril system with Peltophorum dubium and Panic...

With the increasing demand for agricultural, livestock and forestry production in Brazil and in the World, it has become necessary to maximize production in the same area, in a sustainable way, where the silvopastoral system becomes a form of integration of increasing performance. The objective of this work was to evaluate the physical attributes of two land use systems: pure pasture with Panicum maximum cv. Ar...

Tree vegetation in an urban remnant: Lago da Paz forest, Dois Vizinhos, PR, Brazil

This study had the objective to analyze the floristic, structure and diversity of regeneration of a forest fragment located in the urban area of Dois Vizinhos, Paraná State. We used the census method and the traditional phytosociological descriptors as parameters of analysis, giving indications about the ecological value of the fragment. The results showed the occurrence of 231 individuals in 2,500 m² area, dis...

Aspectos gerais e silviculturais de Cordia americana, Aspidosperma polyneuron, ...

O Brasil possui grande diversidade de espécies florestais, no entanto, os povoamentos em sua maioria são com espécies dos gêneros Eucalyptus e Pinus. Frente a isso, o presente estudo baseia-se na análise das características de espécies nativas com alto potencial madeireiro e espécies de caráter inovador para cultivo. O cedro australiano (Toona ciliata) e o mogno africano (Khaya spp.) constituem espécies importa...

Produção de mudas para arborização urbana: infraestrutura e aspectos técnicos d...

Chemical quality of soil with different levels of degradation in the environmen...

The objective of this study was to investigate possible effects of soil contamination from pollution by urbanization and inordinate use of the course on the shores of the Sanga Lagoão of Ouro through soil chemical variables analyzed with multivariate statistical tools. We established five sampling points in the path of urban Sanga that have different uses and management. Alterations in the characteristics of so...

Matéria orgânica do solo em plantios de Pinus taeda e P. elliottii em duas regi...

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; The soil quality monitoring in planted forests, through the efficient use of indicators, is important for the non degradation of the soil by management practices and assessment of possible increases / decreases in the amount of carbon stored. The objective was to assess changes in carbon and nitrogen content and storage in total fractions (COT and NT)...

Biomassa e nutrientes na floresta estacional decidual, em Santa Tereza, RS

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; It had been esteemed the accumulated biomass above and below the soil in two succession phases of a Seasonal Deciduous Forest (brushwood and secondary forest) located in Santa Tereza, RS, and the concentrations and contents of macronutrients, micronutrients and organic carbon in the biomass, allied to the study of the physical and chemistries characte...

Comparison among three different methods of vegetable tissue analysis.

The objective of the present work was to compare three different methods of chemical analysis of vegetable tissue: the method of nitro-percloric digestion, Tedesco et al. and Adler & Wilcox. As material was analyzed 03 samples of the fraction leaves of the litter collected in each one of the two Seasonal Deciduous Forest fragments, collected in August of 1990 in the forest of the “Hill of the Elephant” (San...