Resumo -O objetivo deste trabalho foi avaliar a produção de adubo orgânico de resíduos domiciliares, por meio da integração de compostagem e vermicompostagem, com e sem esterco bovino nesses processos. Foram realizadas duas etapas experimentais: na primeira, testou-se a termoestabilização dos resíduos e estabeleceram-se condições propícias para a introdução das minhocas; na segunda, aos 27 dias de termoestabilização, os resíduos resultantes da primeira etapa foram colocados em um recipiente de 9 dm 3 , com e sem minhocas, em delineamento inteiramente casualizado, com quatro repetições. Aos 19, 55 e 69 dias, avaliaram-se as taxas de reprodução e sobrevivência das minhocas adultas e os atributos químicos do composto com e sem minhoca. As minhocas sobreviveram e se reproduziram nos substratos, com maior taxa de multiplicação no substrato com esterco. A utilização dos resíduos orgânicos de origem domiciliar, para a produção de insumo, é tecnicamente viável, tanto por meio da compostagem, quanto da vermicompostagem. A adição de esterco não reduziu o tempo de maturação do composto. À exceção do K e Mg, que tiveram seus teores alterados, a integração dos processos de compostagem e vermicompostagem, com e sem esterco, produziu adubos com características químicas similares.Termos para indexação: minhocas, composto orgânico, reprodução. Composting and vermicomposting of home residues with bovine manure for organic amendment productionAbstract -The objective of this work was to evaluate the production of organic amendment from home residues by integration of composting and vermicomposting processes with and without bovine manure. Two experimental steps were adopted: in the first one, thermal stabilization of the residues and adequate conditions were set up for earthworm introduction; in the second step, at 27 days of thermal stabilization, residues remained from the first step were placed in a 9-dm 3 container, with and without earthworms, in a completed randomized experimental design of four replicates. Evaluations were made at 19, 55, 69-day period for reproduction and survival rate of adult worms, and chemical attributes of the compost with and without earthworms. Earthworms survived and reproduced in the substrates, and manure gave the highest reproduction rate. The utilization of organic home residues for production of amendment is technically viable by means of composting or vermicomposting. Addition of doses of manure did not decreased the time for compost maturation. Except for the alteration in the levels of K and Mg, the integration of composting and vermicomposting processes yielded products with similar chemical composition.Index terms: earthworm, organic composting, reproduction. IntroduçãoAs áreas urbanas caracterizam-se pela alta produção de resíduos orgânicos, tanto de origem domiciliar quanto de áreas comerciais e industriais como padarias e açougues, entre outras. Esses resíduos geralmente são aterrados, incinerados a temperaturas acima de 900 o C, ou descartados em terrenos baldios, e constituem-se não s...

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ácido indolbutírico (AIB) RES UMOA meta principal no presente trabalho foi avaliar o efeito de três concentrações de auxina (0; 4000 e 8000 ppm) e ácido indolbultírico (AIB), para induzir a formação de raízes adventícias em três tipos de estacas caulinares (herbáceas, semilenhosas e lenhosas) de alamanda (Allamanda cathartica L.). As estacas foram coletadas de plantas existentes na área da UFRRJ, cortadas em bisel, com aproximadamente 15 cm cada uma, as quais foram tratadas com o fungicida Benomyl e, posteriormente, com o AIB. O delineamento experimental utilizado foi em blocos casualizados, com 3 tratamentos e três repetições. As avaliações foram mensais (cada semana constituiu uma época de avaliação) e, ao final de 30 dias, após o plantio, avaliou-se o aparecimento ou não de calos, raízes e brotações. Para a época de avaliação, observaram-se diferenças estatísticas, destacando-se o tratamento com 8000 ppm de AIB com os melhores resultados nas três épocas avaliadas, o mesmo se verificando entre as estacas em que, as semilenhosas e lenhosas apresentaram, nesse tratamento com 8000 ppm de AIB, apresentaram os melhores resultados para a formação de tecido caloso, enraizamento e brotação. Concluise que o ácido AIB influencia no enraizamento de estacas de alamanda. Palavras-chave: raízes adventícias, estaquia, auxina sintéticaRooting of stem cuttings of Allamanda cathartica L treated with indolbuthyric acid (IBA) AB S TR ACTThe objective of this study was to evaluate the effect of three auxin concentrations (0, 4000 and 8000 ppm), Indolbuthyric acid (IBA), to induce the formation of adventitious roots in three types of stem cuttings (herbaceous, woody and semi-woody) of alamanda (Allamanda cathartica L.). The cuttings were collected from plants in the UFRRJ area, cut into bezel, with approximately, 15 cm long, treated with the fungicide Benomyl and later with IBA. The experimental design was in randomized blocks with three treatments (0, 4000 and 8000 ppm of IBA) and three repetitions. The assessments were made weekly (each week being considered a period of evaluation) and at the end of 30 days after planting, observing the appearance or absence of calluses, roots and shoots. Statistical differences were observed for the evaluation period, standing up the treatment with 8000 ppm of IBA, with the best results in the three appraised periods. Among the stakes, the semi-woody and woody ones, in the treatment with 8000 ppm of IBA, presented the best results for the formation of calluses, roots and shoots. The results showed that the IBA acid influences in the rooting of alamanda stem cuttings.

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Knowing the aboveground biomass (AGB) stock of tropical forests is one of the main requirements to guide programs for reducing emissions from deforestation and forest degradation (REDD+). Traditional 3D products generated with digital aerial photogrammetry (DAP) have shown great potential in estimating AGB, tree density, diameter at breast height, height, and basal area in forest ecosystems. However, these traditional products explore only a small part of the structural information contained in the 3D data, thus not leveraging the full potential of the data for inventory purposes. In this study, we tested the performance of 3D products derived from DAP and a technique based on Fourier transforms of vertical profiles of vegetation to estimate AGB, tree density, diameter at breast height, height, and basal area in a secondary fragment of Atlantic Forest located in northeast Brazil. Field measurements were taken in 30 permanent plots (0.25 ha each) to estimate AGB. At the time of the inventory, we also performed a digital aerial mapping of the entire forest fragment with an unmanned aerial vehicle (UAV). Based on the 3D point clouds and the digital terrain model (DTM) obtained by DAP, vertical vegetation profiles were produced for each plot. Using traditional structure metrics and metrics derived from Fourier transforms of profiles, regression models were fit to estimate AGB, tree density, diameter at breast height, height, and basal area. The 3D DAP point clouds represented the forest canopy with a high level of detail, regardless of the vegetation density. The metrics based on the Fourier transform of profiles were selected as predictors in all models produced. The best model for AGB explained 93% (R2 = 0.93) of the biomass variation at the plot level, with an RMS error of 9.3 Mg ha−1 (22.5%). Similar results were obtained in the models fit for the tree density, diameter at breast height, height, and basal area, with R2 values above 0.90 and RMS errors of less than 18%. The use of Fourier transforms of profiles with 3D products obtained by DAP demonstrated a high potential for estimating AGB and other forest variables of interest in secondary tropical forests, highlighting the value of UAV as a low-cost tool to assist the implementation of REDD+ projects in developing countries like Brazil.