O uso de esterco de coelho pode contribuir para suprir a crescente demanda por substratos destinados à produção de mudas de hortaliças. Objetivou-se com este trabalho avaliar a utilização de esterco de coelho como substrato para produção de mudas de alface, após ser submetido a três diferentes processos de estabilização: vermicompostagem, processamento por meio de larvas de Cetoniinae e compostagem natural. Inicialmente foi realizada uma minuciosa caracterização dos substratos avaliados, determinando-se os teores totais, os teores disponíveis e a proporção da fração disponível de N, Ca, Mg, P e K, a densidade e a porosidade. Também foram avaliadas as variações do pH e da condutividade elétrica dos substratos ao longo de 28 dias do desenvolvimento das mudas. O desempenho dos diferentes substratos na produção de mudas de alface foi avaliado por meio da emergência das sementes e de características das mudas relacionadas com o desenvolvimento da parte aérea e da raiz. Pode-se concluir que o uso de esterco de coelho como substrato para a produção de mudas de alface é uma prática recomendada, desde que o seu processamento seja realizado por meio de vermicompostagem com Eisenia fetida ou por meio de larvas de Cetoniinae. Palavras-chave: Cetoniinae; Eisenia fétida; Lactuca sativa; composto orgânico. RABBIT MANURE BASED SUBSTRATE FOR THE PRODUCTION OF LETTUCE SEEDLINGS ABSTRACT: The use of rabbit manure can contribute to supply the growing the demand by substrates intended for the production of vegetable seedlings, This job was realized with the objective of check the use of rabbit manure as substrate to the production of lettuce seedlings, after being submitted to three different stabilization processes: vermicomposting, processing by means of Cetoniinae larvae and natural composting. Were determined the total levels, available and the proportion of the available fraction of N, Ca, Mg, P and K, the density and a porosity of the substrates. It was also checked the pH variations and of the electric conductivity of the substrates over 28 days of the seedlings development. The performance of the different substrates in the production of lettuce seedlings was evaluated through seed emergence and seedling characteristics related to shoot and root development. It can be concluded that the use of rabbit manure as substrate to lettuce seedlings production is a recommended practice, provide that it is processed by means of vermicomposting with Eisenia fetida or by means of larvae of Cetoniinae. Keywords: Cetoniinae; Eisenia fétida; Lactuca sativa; organic compost.

The zinnia (Zinnia elegans Jacq.) is an ornamental plant used in landscape composition and presents great potential for cultivation as a cut flower, potted. Faced with the new trend of integrated flower production, that proposes more environmentally friendly practices aiming at sustainability, there is a need to determine alternative substrates that allow the production of quality seedlings. Therefore, this study aimed to evaluate the vigor and quality of zinnia seedlings produced in alternative substrates in trays with different cell size. Two different types of trays of expanded polystyrene with different cell size were tested as following: 128-cell and 200-cell trays with a volume of 40 cm3 and 16 cm3, respectively. For the growth of the seedlings, three types of substrate were tested: commercial substrate; composting of organic waste; mixture of sand, soil and carbonized rice husk in the proportion of 1:1:1 (v:v:v). The experiment was a completely randomized design, using 24 trays in a factorial arrangement 3x2 (substrate x tray cell size), with four replicate and eight seedling per replicate. The phytotechnical characteristics evaluated were plant height, number of leaves, root length and dry weight of plants, the vigor of seedlings and clod stability was determined by rating scales. The physicochemical and physical proprieties of organic substrate enables produce high quality seedling using 128-cell trays, but the 200-cell trays also produce good quality seedling, having the advantage of using smaller volumes of substrates.

The effective conservation of soil biodiversity and ecosystem services in the face of global-change threats requires improvements in national monitoring. We outline the Global Soil Biodiversity Observatory, an initiative that aims to develop standardized indicators and enhance national monitoring capacities to support evidence-based policymaking and facilitate global assessments.