Interações fósforo-magnésio em mudas de mamoeiros Tainung nº. 1 e Improved Sunrise Solo 72/12

• Autor(a) principal: Vichiato, Marcelo
• Data de Publicação: 2009
• Outros Autores: Carvalho, Janice Guedes de, Vichiato, Mívia Rosa de Medeiros, Silva, Carlos Ramirez de Resende e
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000500010; http://repositorio.ufla.br/jspui/handle/1/7022
• topic: Nutrição mineral; Solo - Magnésio; Solo - Fósforo; Adubação; Mineral nutrition; Soil - Magnesium; Soil - Phosphorus; Fertilizing

he influence of phosphorus (20, 150, 300, 450 , and 600 mg dm-3) and magnesium (0, 15, 30 , and 60 mg dm-3) rates upon the dry aerial biomass yield, and phosphorus and magnesium content and accumulation in cv. Improved Sunrise Solo 72/12 and in the hybrid Tainung nº1 papaya seedlings were evaluated. The experiments were carried out in randomized block design with four replications, in a factorial arrangement. In the ISS 72/12 plants, all phosphorus and magnesium content was influenced by phosphorus-magnesium interactions. Increasing accumulation on dry mass in response to phosphorus and magnesium rates was observed. The greater gain on ISS 72/12 and Tainung nº1 dry aerial biomass was obtained at the 600 mg dm-3 level of phosphorus. In the ISS 72/12 cultivar, under low levels of phosphorus, the magnesium additions increased the phosphorus content on dry aerial biomass yield. The magnesium content in both varieties showed a negative relationship with the phosphorus level of the substrate. The phosphorus content in the dry aerial biomass yield was influenced by phosphorus and magnesium substrate interactions.