The objective was to investigate the context, approach and research topics present in the papers that analysed trace elements in beef cattle to identify gaps and scientific perspectives for the sustainable management of trace elements in livestock. The main research groups came from the United States, Spain, Japan, Brazil, India and Slovakia, which represented 31% of the papers produced. Only 37% of studies addressed aspects that integrated animal, environmental and human health. The reviewed papers concerned 56 elements and 15 bovine tissues (Cu, Zn, Pb, liver, muscle and kidney highlighted). The main gaps were (1) lack of research in developing countries, (2) the need to understand the impact of different environmental issues and their relationship to the conditions in which animals are raised, and (3) the need to understand the role of many trace elements in animal nutrition and their relationship to environmental and human health. Finally, we highlight possible ways to expand knowledge and provide innovations for broad emerging issues, primarily through expanding collaborative research networks. In this context, we suggest the adoption of the One Health approach for planning further research on trace elements in livestock. Moreover, the One Health approach should also be considered for managers and politicians for a sustainable environmental care and food safety.

Plantios homogêneos de Castanha-do-Pará na região Norte de Mato Grosso apresentam elevado potencial, devido às características edafoclimáticas locais e à importância econômica dessa espécie florestal. Nesse aspecto, estudar a ocorrência de térmitas e sua distribuição espacial em plantios homogêneos de Castanha-do-Pará torna-se de extrema relevância, tendo em vista a carência de estudos entomológicos para esses cultivos, bem como para subsidiar informações técnicas acerca da dinâmica desses insetos nesses ambientes. Assim, o objetivo do presente trabalho foi avaliar a ocorrência e a distribuição espacial de térmitas subterrâneos em um plantio homogêneo de Castanha-do-Pará no Norte de Mato Grosso. O estudo foi desenvolvido em um plantio homogêneo de 28 ha, com aproximadamente 16 anos de idade, onde se estabeleceu amostragem em gride com 40 pontos amostrais. Em cada ponto amostral foram instaladas iscas celulósicas inseridas no solo a 20 cm de profundidade, as quais permaneceram em campo por 40 dias. Foram identificados dois gêneros de térmitas, Heterotermes e Nasutitermes, e um total de 1.405 indivíduos, sendo 396 (28,1%) pertencentes ao gênero Nasutitermes, e 1.009 (71,8%) à espécie Heterotermes tenuis. O padrão de distribuição espacial dos térmitas no castanhal é do tipo agregado. A ocorrência da espécie Heterotermes tenuis no plantio homogêneo de Castanha-do-Pará deve ser avaliada com atenção, visto que essa espécie pode se tornar potencial praga na região.

A mandioca é uma planta adaptada às mais diversas condições edafoclimáticas, porém, sua produtividade é fortemente determinada pela disponibilidade de nutrientes no solo, especialmente o potássio (K). Como os depósitos minerais de sulfetos e cloretos de K são escassos no Brasil, estudos têm sido realizados a fim de verificar a eficiência agronômica da utilização da rochagem nas mais diversas culturas agrícolas e regiões do país. O presente trabalho objetivou avaliar os efeitos de um remineralizador de solos obtido de rejeitos de mineração sobre a produtividade de duas variedades de mandioca industrial. O experimento com delineamento em faixa envolveu duas variedades (Sutinga e IAC-12), seis tratamentos e três repetições. Os tratamentos envolveram diferentes estratégias de uso do remineralizador: complementação às fontes convencionais de nutrientes; substituição a tais fontes; e doses crescentes. Nas avaliações foram considerados os fatores: produção da parte aérea; produção da raiz tuberosa; índice de colheita; teor de matéria seca e de amido nas raízes. Os resultados obtidos permitem afirmar que o remineralizador avaliado constitui uma fonte alternativa de potássio para a cultura da mandioca, e da mesma forma, apresenta efeitos como condicionador de solo uma vez que potencializou o efeito das fontes convencionais de nutrientes. Palavras-chave:Manihot esculenta, adubação mineral, rochagem, produção EFFECTS OF SOIL REMINERALIZING (BIOTITE-SHALE) IN PRODUCTION OF TWO CAVASSA VARIETY ABSTRACTCassava is a plant adapted to various soil and climatic conditions, however, productivity is

________________________________________________________________________________ ResumoO objetivo deste trabalho foi avaliar o crescimento e a produtividade do capim BRS Quênia (Panicum maximum) submetido à adubação nitrogenada em Alta Floresta, MT. As maiores produções de matéria seca ocorreram nas doses de 150 e 300 kg ha -1 de N. Observou-se a ocorrência de cigarrinha-verde (Empoasca kraemeri) no período final do experimento. O capim BRS Quênia, nas condições do experimento, apresentou alta resposta à adubação nitrogenada, sendo recomendada a dose de 150 kg de N ha -1 . Sugere-se mais estudos para verificar a suscetibilidade do capim BRS Quênia à cigarrinha-verde (E. Kraemeri) e identificar as melhores condições para o máximo desempenho dessa forrageira na região. AbstractThe objective of this work was to evaluate the growth and productivity of BRS Quênia grass (Panicum maximum) submitted to nitrogen fertilization in Alta Floresta, MT. The highest dry matter yields occurred at doses 150 and 300 kg ha -1 . It was observed the occurrence of green leafhopper (Empoasca kraemeri) in the final period of the experiment. The BRS Quênia grass, under the conditions of the experiment, presented a high response to nitrogen fertilization. The dose of 150 kg of N ha -1 is recommended. Further studies are suggested to verify the susceptibility of BRS Quênia grass under the occurrence of the green leafhopper (E. kraemeri) and to identify the best conditions for the maximum performance of this forage in the region.

River basin environmental diagnosis and monitoring are fundamental for water resource use and conservation plans, as these systems integrate different landscape elements and may undergo impacts and changes of different levels and scales. In this context, this work aimed to characterize the geospatial, morphometric, and environmental dynamics in the Mariana microbasin, in the municipality of Alta Floresta, to provide technical-scientific subsidies for environmental management and planning at a local and regional level. The microbasin was analyzed for morphometric, topographic, and land-use and cover parameters using geospatial data processed in a geographic information system. The microbasin is classified as fourth-order, has a network of 72 channels, and its relief is mostly flat and smooth wavy. Moreover, the soil is predominantly covered by agricultural lands, encompassing 70% of the area. This feature brings the need to adopt conservation practices for soil management. This study showed the need for continuous environmental monitoring programs and expansion of conservation actions in the studied area.

Brazil nut is one of the most important species of the Amazon due to its socioeconomic importance. Especially in homogeneous production systems, it may be susceptible to damage by wood-boring insects, as by the subfamily Scolytinae (Coleoptera: Curculionidae); thus, inadequate management conditions can cause economic damage. Therefore, the objective of the present work is to evaluate the occurrence of wood-boring insects (Curculionidae: Scolytinae) in native and homogeneous systems of Brazil nut in the Meridional Amazonian, Brazil. The study was conducted in three environments: Brazil Nut Native Anthropized, Homogeneous Brazil Nut and Brazil Nut Native Preserved. Twelve ethanol (96° GL) traps were installed in each environment during four sampling periods. The data were submitted to entomofaunistic analysis, Pearson´s correlation analysis and cluster analysis. A total of 2,243 individuals from 31 species were sampled, of which 23 were from the Brazil Nut Native Anthropized nut, 24 from the Homogeneous Brazil Nut and 26 from the Brazil Nut Native Preserved. Some species are restricted to a specific environment, such as Corthylocurus vernaculus Wood & Bright, 1992 and Xyleborus biconicus Eggers, 1928, in relation to Brazil Nut Native Anthropized, Xyleborus tolimanus Eggers, 1928 that occurred only in Homogeneous Brazil Nut and Corthylus antennarius Schedl and Hypothenus bolivianus Wood & Bright, 1992 verified only in Brazil Nut Native Preserved. In the faunistic analysis, we highlight the species Xyleborus affinis (Eichhoff, 1868), which was the most representative one in the three environments and a super-dominant species in all four sampling periods. Among the species considered indicator due to their high representativeness in the sampling, only Premnobius cavipennis Eichhoff, 1878 showed a significant negative correlation between its abundance and the minimum temperature for environments Homogeneous Brazil Nut and Brazil Nut Native Preserved. There was a greater similarity between the Brazil Nut Native Anthropized and the Brazil Nut Native Preserved; these two environments showed dissimilarity with the Homogeneous Brazil Nut. Monitoring wood-boring insects in Brazil nut agroecosystems is fundamental for the establishment of integrated pest management strategies.

Carlinda é um dos principais produtores de maracujá de Mato Grosso, mas apesar das condições edafoclimáticas favoráveis, a falta de informações a respeito dos aspectos socioeconômicas e técnico-produtivos dificultam a elaboração de estratégias eficazes para o aprimoramento da cadeia produtiva. Assim, esta pesquisa teve como objetivo realizar o diagnóstico socioprodutivo dos sistemas de produção de maracujá no contexto da agricultura familiar em Carlinda. A coleta de dados se deu com visitas técnicas em 21 unidades de produção e entrevistas com 19 produtores. Os dados foram tabulados e realizada análise quantitativa bem como com a integração do geoprocessamento. De maneira geral, os sistemas apresentam como características tecnológicas: uso de adubação convencional, irrigação e fertirrigação e manejo de pragas, doenças e plantas daninhas com uso principalmente de agrotóxicos. O principal canal de comercialização é a cooperativa local, o que demonstra o nível de organização social e produtiva da atividade. Ademais, os principais fatores limitantes identificados estão associados à falta de assistência técnica, alta demanda de mão-de-obra para os tratos culturais e manejo de adubação. O diagnóstico permitiu evidenciar a necessidade de ações interinstitucionais públicas e privadas para o fortalecimento e sustentabilidade da cadeia de produção, frente às limitações e potencialidades identificadas.

2 Brazil nut (Bertholletia excelsa bonpl.) in the Southern Amazon, Brazil. Abstract 29 Brazil nut is one of the most important species of the Amazon due to its 30 socioeconomic importance. Especially in homogeneous production systems, it may be 31 susceptible to damage by wood-boring insects, as by the subfamily Scolytinae 32 (Coleoptera: Curculionidae); thus, inadequate management conditions can cause 33 economic damage. Therefore, the objective of the present work is to evaluate the 34 occurrence of wood-boring insects (Curculionidae: Scolytinae) in native and 35 homogeneous systems of Brazil nut in the Meridional Amazonian, Brazil. The study 36 was conducted in three environments: Conserved Native Planting nut, Anthropized 37 Native Planting nut and Homogeneous Planting nut. Twelve ethanol traps were installed 38 in each environment during four sampling periods. The data were submitted to 39 entomofaunistic analysis, Pearson´s correlation analysis and cluster analysis. A total of 40 2,243 individuals from 31 species were sampled, of which 23 were from the 41 Anthropized Native Planting nut, 24 from the Homogeneous Planting nut and 26 from 42 the Conserved Native Planting nut. In the faunistic analysis, we highlight the species 43 Xyleborus affinis (Eichhoff, 1868), which was the most representative one in the three 44 environments and a super-dominant species in all four sampling periods. There was a 45 greater similarity between the Anthropized Native Planting nut and the Conserved 46 Native Planting nut; these two environments showed dissimilarity with the 47 Homogeneous Planting nut. Monitoring coleoborers in Brazil nut agroecosystems is 48 fundamental for the establishment of integrated pest management strategies. Introduction 53 Considered one of the most important extractive species in the Amazon and 54 Brazil, Brazil nut (Bertholletia excelsa Bonpl.: Lecythidaceae) is part of the 55 socioeconomic support base of many traditional communities and has become a crop of 56 interest for commercial exploitation in homogeneous forest stands [1-3]. 57 Mainly because of deforestation, the decrease in Brazil nut trees in natural 58 areas compromises the sustainability of the extractive production chain. It is possible to 59 point to a tendency for declining extractive activity and, at the same time, the potential 60 for the rise of Brazil nut plantations, with greater technification, enhanced management 61 strategies and the use of sustainable agricultural practices [4,5]. In this way, the 62 development of silvicultural studies of Brazil nut as an alternative in the exploration of 63 forest and non-forest products is of paramount importance, aiming at the development 64 of effective management strategies [6]. 65 In forest systems, insects perform fundamental functions and interactions in 66 maintaining and regulating the conditions and resources of ecosystems. However, 67 insect-plant interactions in certain circumstances can compromise production in 68 agroecosystems, whether in direct or indirect damage, due to...