Data/hora: 24/06/2024 01:19:30

Biblioteca(s): | Embrapa Soja.
Data corrente: | 26/11/1992
Data da última atualização: | 29/10/2004
Autoria: | SFREDO, G. J.; SARRUGE, J. R.; CAMPO, R. J.
Afiliação: | EMBRAPA-CNPSo. Londrina, PR.
Título: | Accumulation of macronutrientes by two sunflower (Helianthus annuus L.) cultivars under field conditions.
Ano de publicação: | 1985
Fonte/Imprenta: | In: CONFERENCIA INTERNACIONAL DE GIRASOL, 11., 1985, Mar del Plata. Actas... Mar del Plata: ASAGIR/ISA, 1985.
Volume: | t.1
Páginas: | p.189-194.
Idioma: | Inglês
Conteúdo: | In order to study the accumulation of the macronutrients by sunflower plants a field experiment was carried out at the "National Center for Soybean Research", Londrina, PR, Brazil. Six fertilizers doses of NPK were used but in the present paper only the dose 0-0-0 was examined. Samples of plants were harvested from 14 days after emergence to the end of the plant cycle. The authors concluded: the maximum accumulation occurs on 73 and 82 days after emergence for leaves and stems, and 90 and 100 days for seeds and receptacle; the maximum accumulation of the macronutrients for a production of 1,000 kg of seeds was K = 131 kg; N = 81 kg; Ca = 60 kg; Mg = 19 kg; P = 13 kg and S = 4 kg; the exportation of the macronutrients correspondent to a production of 1,000 kg of seeds were N = 32 kg; K = 10 kg: P = 6 kg; Mg = 3 kg; Ca = 2 kg and S = 1 kg.
Palavras-Chave: | Brasil; Cultivar; Fertilizer; Macronutrient; Macronutriente; Parana; Sunflower; Variety.
Thesagro: | Fertilizante; Girassol; Helianthus Annuus.
Thesaurus Nal: | Brazil.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)