Data/hora: 05/06/2024 05:33:30

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 09/11/1992
Data da última atualização: | 09/04/2010
Autoria: | ELAMIN, O. M.; WILCOX, G. E.
Título: | Nitrogen form ratio influence on muskmelon growth, composition, and manganese toxicity.
Ano de publicação: | 1986
Fonte/Imprenta: | Journal American Society Horticultural Science, v. 111, n. 3, p. 320-322, 1986.
Idioma: | Inglês
Conteúdo: | Muskmelon (Cucumis melo L.) "Harvest Queen" was  grown in sand culture to investigate the effects of NH4:NO3 ratios on melon growth and elemental composition. Plants grown at NH4:NO3 ratios of 98:14, 84:28, and 56:56 developed NH4 toxicity symptoms, whereas plants grown with 20 ppm Mn and NH4:NO3 ratios of 0:112, 14:98, 28:84, and 56:56 developed Mn toxicity symptoms. Increasing the proportion of NH4 in nutrient solution up to 1:1 with NO3 decreased Mn concentrations in plant tissues and alleviated Mn toxicity symptoms, whereas at NH4:NO3 ratios of 84:28 and  98:14 uptake of Mn was inhibited and never reached a concentration in the tissue that developed toxicity symptoms. Shoot and root growth was greatest when grown at the 14:98 NH4:NO3 ratio. Increasing NH4 in the solution beyond 14 ppm in the 112-ppm N mixture resulted in increasing limitation of growth. Increasing Mn concentration in the nutrient solution to 20 ppm restricted  growth at NH4:NO3 ratios menor ou igual a 1. However, Mn treatment did not influence the growth of plants grown at NH4:NO3 ratios maior que 1 at 84:28 and 98:14.
Palavras-Chave: | Composição; Nutrição de planta.
Thesagro: | Crescimento; Fisiologia Vegetal; Melão; Nitrogênio.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (2856-1) - ADD - SP - PP - SP 5001/1993 -  - SP5001/93 - DIS