No abstract

O objetivo deste estudo foi calcular a Fórmula Modificada de Monte Alegre (FMA⁺) e ajustar as classes de risco de incêndio em áreas de florestas plantadas na costa norte-central do estado do Espírito Santo e na costa sul do estado da Bahia. A metodologia utilizada incluiu seis etapas: cálculo de risco; desenvolvimento de planilhas de acordo com a ocorrência, ou não, de incêndios florestais; desenvolvimento de planilhas de acordo com a estação de incêndios florestais na região estudada; definição de classe de risco; análise de resultados das classes determinadas; seleção de melhor ajuste. Observou-se que a metodologia de definição de classe para o sistema FMA⁺ obteve excelentes resultados. Aumentou em 19,3; 21,53 e 31,3% para o percentual de sucesso nas subzonas 1, 2 e 3, respectivamente, o que traduz em resultados este importante estudo para a implementação bem-sucedida da FMA⁺ em outras áreas.

Often unable to regenerate naturally, areas degraded by ore tailings must follow measures aimed at their environmental recovery. The revegetation and the use of bio-stimulants can contribute to the improvement of soil fertility leading to increased production of plant biomass and the cycling of nutrients between soil-plant.The objective was to evaluate the dry matter production, accumulation and nutrient export rates by pig beanplants (Canavalia ensiformis) and Crotalaria juncea cv. IAC-KR-1 as a function of the application of humic substances and diazotrophic bacteria. The experiment was conducted in a greenhouseusing iron ore tailings as substrate. An experimental design of random blocks (4x3x2) was used with four repetitions, four doses of humic substances, applied at 3 different times, with or without inoculation of diazotrophic bacteria. The supply of humic substances and mainly the inoculation in both species increased the dry matter production, reaching 70% of the average increase in pig beans. Inoculation in pig bean plants increased the absorption and transfer factor of Fe and P, and reduced the transfer factor of K, Ca and Mg, and in crotalaria plants increased the absorption of Mg, P and Mn, and reduced the absorption of Fe. The high content of Fe in mining tailings culminated in high absorption and mobilization of this element in the roots of the plants as an alternative to minimize toxic effects caused by its excess.

No abstract

Palavras-chave: 1. Bactérias promotoras de crescimento de plantas 2. Urochloa brizantha cv. Marandu 3. Ureia 15 N 4. Bactérias endofíticas 5. Recuperação de N

No abstract

Abstract. With the advent of computation and the progressive advancement of geotechnologies, the use of mathematical models of wildfire risk became more expressive in quantitative terms. The existence of a significant and variable number of models of wildfires risk presents the necessity to select the model that best fits a probable region – which can be done in two ways: visually or through the confrontation of existing models. In this sense, the present study aims at selecting the wildfire risk models FWI, FMA⁺ and RIF-Database for the Eucalyptus plantations. The study area extends from the north-central coast of the state of Espírito Santo and the south coast of Bahia, Brazil. The database was comprised the period between January 1st, 2010 to June 30st, 2016, with 10,447 occurrences. The validation and choice of the results were determined by the success percentages and the skill score value, for each subzone and risk model. After, it was performed the parametric analysis of Variance Analysis (ANOVA), if the F test was significant, the Tukey-Kramer post-hoc test (p