Nutrição mineral de mudas de eucalipto produzidas sob diferentes lâminas de irrigação e substratos
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Data
2007-08-01
Autores
Lopes, Jane Luísa Wadas [UNESP]
Guerrini, Iraê Amaral [UNESP]
Saad, João Carlos Cury [UNESP]
Silva, Magali Ribeiro da [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Ciência do Solo
Resumo
Este trabalho teve como objetivo avaliar os efeitos das lâminas brutas de irrigação na concentração de nutrientes de mudas de Eucalyptus grandis, produzidas em diferentes substratos. O experimento foi realizado na Camará - Mudas Florestais, em Ibaté, SP, e constituiu-se de um fatorial 5 x 4, sendo cinco lâminas brutas de irrigação diárias (6, 8, 10, 12 e 14 mm), aplicadas em diferentes horários (10, 13 e 16 h), e quatro substratos (FB - fibra de coco; CPV - casca de pinus e vermiculita; CATV - casca de pinus, carvão, turfa e vermiculita; e um MIX - 70 % de CPV e 30 % de FB). Foram determinadas os conteúdos dos nutrientes na parte aérea e no sistema radicular das mudas. Os resultados indicaram que houve influência das lâminas de irrigação e dos substratos no conteúdo dos nutrientes das mudas com maior acúmulo dos mesmos à medida que o fornecimento de água foi maior. As plantas crescidas nos substratos FB e CPV registraram os maiores acúmulos de nutrientes. CPV foi o melhor em se tratando do acúmulo dos macronutrientes nas raízes e também, juntamente com FB, o melhor para o acúmulo dos micronutrientes nas raízes e na parte aérea. Não houve influência dos substratos no acúmulo dos macronutrientes na parte aérea, porém houve das lâminas de irrigação.
The objective of this work was to evaluate the effects of gross irrigation depths on the nutrient concentration of Eucalyptus grandis seedlings, produced in different substrates. The experiment was carried out in Camará - Mudas Florestais, in Ibaté, São Paulo, in a factorial 5 x 4, with five daily irrigation levels (6, 8, 10, 12 and 14 mm), applied three times a day (at 10 am, 13 pm and 16 pm), on four substrates (FB- coconut fiber; CPV- pine bark and vermiculite; CATV- pine bark, coal, turf and vermiculite and MIX- 70 % CPV and 30 % FB). The nutrient concentration was determined in the aerial part and roots of the seedlings, which was influenced by irrigation levels and substratum type. The nutrient concentrations rose with the increase of the irrigation levels. The nutrient accumulation was highest using FB and CPV substrates. CPV was best for macronutrient accumulation and together with FB, best for micronutrient accumulation in roots and aerial parts. Macronutrient accumulation in the aerial part was influenced by the irrigation levels but not by the substratum.
The objective of this work was to evaluate the effects of gross irrigation depths on the nutrient concentration of Eucalyptus grandis seedlings, produced in different substrates. The experiment was carried out in Camará - Mudas Florestais, in Ibaté, São Paulo, in a factorial 5 x 4, with five daily irrigation levels (6, 8, 10, 12 and 14 mm), applied three times a day (at 10 am, 13 pm and 16 pm), on four substrates (FB- coconut fiber; CPV- pine bark and vermiculite; CATV- pine bark, coal, turf and vermiculite and MIX- 70 % CPV and 30 % FB). The nutrient concentration was determined in the aerial part and roots of the seedlings, which was influenced by irrigation levels and substratum type. The nutrient concentrations rose with the increase of the irrigation levels. The nutrient accumulation was highest using FB and CPV substrates. CPV was best for macronutrient accumulation and together with FB, best for micronutrient accumulation in roots and aerial parts. Macronutrient accumulation in the aerial part was influenced by the irrigation levels but not by the substratum.
Descrição
Palavras-chave
Eucalyptus grandis, viveiro, irrigação, nutrição mineral, Eucalyptus grandis, tree nursery, irrigation, mineral nutrition
Como citar
Revista Brasileira de Ciência do Solo. Sociedade Brasileira de Ciência do Solo, v. 31, n. 4, p. 713-722, 2007.