Poliuretano expansível e policloreto de vinila como recipiente para estudo de descompactação biológica do solo

• Autor(a) principal: Sabóia, Aline de Souza
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/3692
• topic: Raphanus Sativus L.; Compactação do solo; Densidade do solo; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA; Raphanus Sativus L.; Soil compaction; Soil density

Scientific research has an impact on the search for sustainable improvements in the agricultural production system. Thus, the objective was to evaluate the performance of an expandable polyurethane and polyvinyl chloride container for studies on biological soil decompression. The experiment was carried out in a greenhouse, at the Universidade Federal de Mato Grosso, Campus Rondonópolis, from November 2019 to January 2020. The soil used was collected in an area under Cerrado vegetation, in the 0-0.20 m layer. The experimental design was completely randomized, in five replications, with five levels of soil density (1.0; 1.2; 1.4; 1.6 and 1.8 Mg m-3 ) and two types of pots (Polychloride Vinyl - PVC and expandable Polyurethane - PU). The PVC experimental unit was assembled with three 200 mm inner diameter and 100 mm high rings, joined with “silver tape”. The expandable polyurethane treatments were made from a mold for application of the compound around the previously compacted soil layers, of equal volume to those of the PVC pot, and later wrapped in formica. The 100 mm lower and upper soil layers of the pots were filled with soil at a density of 1.0 Mg m-3 and the intermediate soil layer according to each density of the experimental treatment. The evaluation of the performance of the container was carried out indirectly by means of the response culture (forage radish), which evaluated the variable number of leaves, plant height, stem diameter, chlorophyll index (SPAD index), dry mass of the aerial part, root dry mass, total dry mass, root volume, root diameter, root length and shoot/root ratio. The experimental data were submitted to analysis of variance. The increase in soil density influences the development of forage radish and the container used interferes with the development of the root system of the crop. The expandable polyurethane vase proved to be more suitable for the study of biological decompression compared to the PVC vase.