Efeito de parcelamento da fertirrigação com N E K E salinidade do solo no crescimento inicial de cultivares de cafeeiro

• Autor(a) principal: Faria, Fabio Henrique de Souza
• Data de Publicação: 2009
• Outros Autores: Lima, Luiz Antonio, Ribeiro, Moisés Santiago, Rezende, Fátima Conceição, Carvalho, Janice Guedes de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/41923
• topic: Café - Irrigação; Café - Fertilização; Salinidade do solo; Condutividade elétrica; Coffee - Irrigation; Coffee - Fertilization; Soil salinity; Electric conductivity

Irrigated coffee production has expanded because of the excellent results of techniques such as fertigation. It can provide rapid initial growth; however, the salinity of excessive nutrient solution can limit plant growth and cause plant mortality. N and K are mainly used in covering layers and their recommended doses are 4 gplant-1 month-1. This study aimed to assess the initial growth of 'catuaí' and 'catucaí' coffee plants and soil salinity resulting from fertigation with N (urea) and K (KCl) according to the indicated doses and fractionated every 2, 4, 6 and 8 weeks. The experiment was carried out in a greenhouse of UFLA/DEG, Lavras-MG, Brazil, where 13-l vases were irrigated under soil water tensions between 20 and 30 kpa during 24 weeks. The following were evaluated: CE fertilizer solution and CE soil solution, plant height and shoot diameter after 8-week cycles. Results indicated that the used fertilizer dose was excessive, causing plant death after 2 cycles, except for the control. These varieties resisted soil salinity (CEea = 1.2 ds m-1). Despite the CE of the applied fertilizer solution be high, the results were higher than those of similar studies with NaCl solution to lower salinity levels.