Desenvolvimento e estado nutricional da beterraba em função da omisão de nutrientes
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Data
2008-06-01
Autores
Alves, Adriana U [UNESP]
Prado, Renato de M [UNESP]
Gondim, Ancélio Ricardo de O [UNESP]
Fonseca, Ivana M [UNESP]
Cecílio Filho, Arthur B [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Horticultura
Resumo
Com o objetivo de avaliar o efeito da omissão de macronutrientes no desenvolvimento e no estado nutricional da beterraba, assim como descrever sintomas visuais de deficiência nutricional, um experimento foi conduzido em casa de vegetação da UNESP, Campus de Jaboticabal, SP. O delineamento experimental foi inteiramente casualizado, com sete tratamentos, que corresponderam à solução completa (macro e micronutrientes) e à omissão individual de N, P, K, Ca, Mg e S, com três repetições. Avaliou-se a altura das plantas, o número de folhas, a área foliar, a matéria seca da parte aérea, da raiz e planta inteira, os teores dos macronutrientes da parte aérea e raiz e descritos as desordens nutricionais. As omissões individuais de N, P, K e Ca foram as mais limitantes para o crescimento vegetativo da beterraba, reduzindo consideravelmente a altura, o número de folhas e as matérias secas de parte aérea, raiz e planta inteira. Foram observados sintomas de deficiência nutricional de cada elemento. Os teores dos macronutrientes na parte aérea do tratamento completo e com omissão dos nutrientes foram respectivamente: N = 32,9 - 13,8; P = 9,0 - 0,8; K = 126,0 - 15,1; Ca = 12,0 - 1,0; Mg = 10,1 - 0,7; S = 3,6 - 1,2 g kg-1.
An experiment was conducted under greenhouse conditions, in Jaboticabal, São Paulo State, Brazil, to evaluate the effects of macronutrient omission on beet nutritional status and development, as well as to describe nutritional deficiency symptoms. The experiment was arranged in completely randomized design with three replications and seven treatments, corresponding to complete nutritive solution (macro and micronutrients) and individual N, P, K, Ca, Mg and S omission. Plant height, number of leaves, leaf area, shoot, root and whole plant dry mass and macronutrient levels were determined and nutritional deficiency symptoms were described. Individual omissions of N, P, K or Ca were the most limiting for beet growth, considerably reducing plant height, number of leaves, and shoot, root and whole plant dry mass. Nutritional deficiency symptoms were observed for each element. Shoot macronutrient levels in control and nutrient omission treatments were, respectively: N = 32.9 - 13.8; P = 9.0 - 0.8; K = 126.0 - 15.1; Ca = 12.0 - 1.0; Mg = 10.1 - 0.7; S = 3.6 - 1.2 g kg-1.
An experiment was conducted under greenhouse conditions, in Jaboticabal, São Paulo State, Brazil, to evaluate the effects of macronutrient omission on beet nutritional status and development, as well as to describe nutritional deficiency symptoms. The experiment was arranged in completely randomized design with three replications and seven treatments, corresponding to complete nutritive solution (macro and micronutrients) and individual N, P, K, Ca, Mg and S omission. Plant height, number of leaves, leaf area, shoot, root and whole plant dry mass and macronutrient levels were determined and nutritional deficiency symptoms were described. Individual omissions of N, P, K or Ca were the most limiting for beet growth, considerably reducing plant height, number of leaves, and shoot, root and whole plant dry mass. Nutritional deficiency symptoms were observed for each element. Shoot macronutrient levels in control and nutrient omission treatments were, respectively: N = 32.9 - 13.8; P = 9.0 - 0.8; K = 126.0 - 15.1; Ca = 12.0 - 1.0; Mg = 10.1 - 0.7; S = 3.6 - 1.2 g kg-1.
Descrição
Palavras-chave
Beta vulgaris, Nutritional deficiency, Mineral nutrition, Development, Beta vulgaris, deficiência nutricional, Nutrição mineral, Crescimento
Como citar
Horticultura Brasileira. Associação Brasileira de Horticultura, v. 26, n. 2, p. 292-295, 2008.