Manganês na nutrição e na produção de massa seca do capim-mombaça

• Autor(a) principal: Checchio Mingotte, Fabio Luiz [UNESP]
• Data de Publicação: 2011
• Outros Autores: Rodrigues dos Santos, Carlos Leandro, Prado, Renato de Mello [UNESP], Flores, Rilner Alves, Togoro, Aluisio Hideki, dos Santos da Silva, Juliana Aparecida, Politi, Lucas Sanches, Pinto, Anderson Santos, Aquino, Daily Soraya
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.seer.ufu.br/index.php/biosciencejournal/article/view/11721; http://hdl.handle.net/11449/3760
• topic: Panicum maximum; Soil fertility; Micronutrient; Toxicity; Pasture

There are few studies that relate the micronutrient manganese nutritional status and production of fodder. The objective was to evaluate the application of manganese in the nutrition and growth of Mombaca grass. The completely randomized design was used with five manganese levels (0, 15, 30, 60, 120 mg dm(-3)) and four replicates. Each experimental unit consisted of a pot filled with 3.5 dm(-3) of soil from Oxisol (Mn = 0.6 mg dm(-3)), containing four plants. Two harvests were set, the first 44 days after sowing and the second 38 days after the first cut. The concentration of manganese in the soils, the manganese content of leaves, number of tillers, plant height, shoot dry mass in each slice and the root system of Mombaca grass were evaluated. The applied rates of manganese resulted in increased accumulation of Mn in the plant, and there was an increase in dry mass of Mombaca grass, with maximum production, obtained from derivation, of 5.9 and 6.3 g plant(-1) for levels of 121 and 71 mg dm(-3) of Mn in the first and second cut respectively. The Mombaca grass has showed high manganese's tolerance, the critical level of toxicity was 841 mg kg(-1) in the second cut.