Postharvest quality of tomato as affected by nitrogen and sulfur interaction

• Autor(a) principal: Siueia Júnior, Matias
• Data de Publicação: 2020
• Outros Autores: Silva, Maria Ligia de Souza, Trevizam, Anderson Ricardo, Faquin, Valdemar, Silva, Deivisson Ferreira da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/48505
• topic: Lycopene; Physicochemical quality; Solanum lycopersicum L.; Soluble solids; Titratable acidity; Vitamin C; Tomate - Qualidade pós-colheita; Licopeno; Qualidade físico-química; Sólidos solúveis; Acidez titulável; Vitamina C

Nitrogen (N) and sulfur (S) are nutrients that, in addition to influencing plant growth and production, interfere with processes related to postharvest fruit quality. In the present study, N x S interaction was evaluated in the postharvest quality of tomato (Solanum lycopersicum L.). The experiment was conducted in a greenhouse using 5 dm3 capacity vessels containing a 0-20 cm layer of a dystropherric Red Latosol. A 5 x 3 factorial design was used, with combinations of five doses of N (0, 100, 200, 300 and 400 mg dm-3) and three doses of S (0, 60 and 120 mg dm-3) distributed in a completely randomized design, with four repetitions. After harvest, the attributes of fruit quality were evaluated: firmness, pH, soluble solids (SS), titratable acidity (AT), soluble solids ratio and titratable acidity (SS / AT), vitamin C, lycopene and beta-carotene. An increase in firmness was observed, as well as the content of soluble solids, titratable acidity and the SS / AT ratio of the fruits as a result of the interaction N x S. However, this interaction favoured the reduction of the contents of vitamin C, lycopene and beta-carotene, and the quality characteristics of tomato fruit in relation to the recommended values. Only the increasing doses of N favoured a higher pH in the tomato fruits.