Efeito das larvas de besouro no processo de decomposi??o de esterco de coelho e produ??o de substratos org?nicos para mudas de hortali?as

• Autor(a) principal: Pereira, Claudete Martins da Silva
• Data de Publicação: 2017
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
• Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/2482
• topic: Compostagem; Cetoniinae; Vermicompostagem; Oligochaeta; Composting; Cetoniinae; Vermicomposting; Agronomia

The soil?s fertility and nutrient cycling are essential for agricultural production. Many organisms play a key role in the decomposition of organic matter present in nature. Among these organisms, more attention and research should be directed to the coprophagous insects. They transform agricultural residues in material rich in nutrients. Coleoptera families act in the fragmentation of decomposing organic matter (vegetal remains, rotten wood, straw, manure, among others), participating in the cycling of nutrients, but little is known about the humus produced by other species of the fauna of the soil beyond the earthworms. The objective of this work was to study compost from rabbit manure processed by beetle larvae under controlled conditions, and to analyze the potential of usage of this compost as substrate for lettuce seedlings production. To reach this goal, the study was accomplished in Embrapa Agrobiologia, Serop?dica (RJ), and it was divided in two phases. In the first chapter, the rabbit manure by beetle larvae and earthworms were incubated, aiming the compost production. During the course of the composting process, samples were taken at 0, 30, 60 and 90 days of incubation. In these samples the variables analyzed were: electrical conductivity (EC); pH; contents of N, P, K, Ca and Mg; and humic substances. In the second chapter the rabbit manure compost produced were evaluated as substrates for lettuce seedlings production. The following characteristics were evaluated: germination percentage, aerial part's height, number of leaves, production of fresh mass of aerial part and of the root, root volume and clod stability. The results indicated that the substrate of the cuniculture residue compost processed by cetoniinae larvae was as efficient as the substrate from vermicomposting, and the substrate commonly used in the experimental research site (Fazendinha km 47) for production of lettuce seedlings.