Sunflower supplemented with landfill percolate and submitted to salinity

• Autor(a) principal: de Arruda, Julyanne Fonteles
• Data de Publicação: 2019
• Outros Autores: Sena, Larissa Moraes, Batista de Brito, Paulo Ovídio, Nunes Júnior, Francisco Holanda, Pontes Filho, Roberto Albuquerque, Gondim, Franklin Aragão
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Verde de Agroecologia e Desenvolvimento Sustentavel
• Texto Completo: https://www.gvaa.com.br/revista/index.php/RVADS/article/view/6735
• topic: Saline concentration; Fertilization; Helianthus annuus L.; Growth Analyzes; Concentração Salina; Helianthus annuus L.; Fertilização; Análises de Crescimento

Landfill percolate is a liquid produced from physical, chemical and biological processes to which municipal solid waste is subjected to landfills. It has a variable physicochemical composition and may contain high levels of nutrients, thus being used in plant fertilization. Therefore, the aim of this work was to evaluate the growth of sunflower plants irrigated with water of moderate salinity and with nutritional supplementation with landfill percolate. The experiment was carried out in experimental area under a completely randomized design in a 4 x 2 factorial design (1: 100% fine grained sand - NBR 6502; 2: sand + mixed organic fertilizer (sugarcane bagasse mix, cattle manure, chicken manure, wood sawdust and agricultural plaster) and fertilizer 80 kg N ha-1, 3: sand + landfill percolate 80 kg N ha-1, and 4: sand + landfill percolate 160 kg N ha-1) and two saline concentrations of irrigation (distilled water or 60 mM NaCl solution), with 10 repetitions in 12 L pots. Growth analyzes (height, stem diameter, leaf number), relative chlorophyll content and chapter diameter were performed. Under the experimental conditions employed, sandy substrate, landfill percolate concentrations used promoted increases in all growth variables analyzed in sunflower seedlings, especially at 80 Kg N ha-1. Irrigation with 60 mM NaCl solution did not cause negative effects on growth variables, thus demonstrating the moderate tolerance of sunflower plants to salinity in sandy substrate.