Diferentes substratos na produção de mudas de mirtileiro

Ristow, N. C.; Antunes, Luís Eduardo Corrêa; Carpenedo, S.; Schuch, Márcia Wulff

doi:10.1590/s0103-84782011005000091

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Similar results were reported by other authors, who also observed changes in foliar concentration of some elements in response to increasing doses of N (Spiers & Braswell, 2002;Castaño et al, 2008;Bañados et al, 2012;Bryla et al, 2012). However, the main cause of nutritional imbalance was the change in the chemical characteristics of the substrate as a function of N levels ( Figure 1a); having the decrease of pH as probable responsible factor, once it induced the increase in Al content (Ristow et al, 2011), and the decrease in Ca, Mg and K (Figure 1c, d, f, respectively). According to Spiers (1990), lowering the pH associated with increased aluminum available to plants can result in damage to the growth and production of blueberry plants.…”

Section: Resultssupporting

confidence: 89%

Nitrogen fertilizer affects the chemical composition of the substrate, the foliar nutrient content, the vegetative growth, the production and fruit quality of blueberry

et al. 2015

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The objective of this study was to investigate the influence of different nitrogen fertilizer rates on chemical composition of substrate, vegetative growth, yield, fruit quality and leaf nutrient concentration of Misty and O'Neal blueberry cultivars. It was applied five nitrogen rates. In the years 2008 and 2009 were: 0, 5, 10, 15, and 20 g plant -1 , whereas, in 2010, due to the growth and development of plants, the rates were: 0; 7.5; 15; 22.5; and 30 g plant -1. The variables analized were: plant height, dry mass of pruning, shoot length, chlorophyll content, yield, fruit mass, pH, titratable acidity, soluble solids, anthocyanin content, antioxidant activity, total phenolics of fruits, leaf nutrient concentration (N, P, K, Ca, Mg, B, Fe, Mn and Zn), and chemical properties of the substrate. Levels of N reduced the pH, exchangeable Ca and Mg and increased the Al content in the substrate. In leaves, there was an increase in N, P and Fe and a decrease in Ca, Zn, Mn and B. The highest yield was obtained with the estimated rate of 7.37 g plant -1 of N. Regarding functional compounds, there was a linear increase in antioxidant activity and phenolic compounds. It can be concluded that N fertilization with ammonium sulfate, significantly influenced the chemical composition of the substrate, nutrient content of leaves, vegetative growth, yield, and fruit quality of blueberries.Additional keywords: ammonium sulfate; mineral fertilization; pH; Vaccinium. ResumoEste trabalho teve por objetivo verificar a influência de diferentes doses de nitrogênio (N) na composição química do substrato, na concentração foliar de nutrientes, no crescimento vegetativo, na produção e na qualidade dos frutos de mirtileiro, das cultivares Misty e O'Neal. Em 2008 e 2009, foram aplicadas 0; 5; 10; 15 e 20 g de N planta -1 ; em 2010, devido ao crescimento e ao desenvolvimento das plantas, as doses aplicadas foram 0; 7,5; 15; 22,5 e 30 g de N planta -1 . As variáveis analisadas foram: altura de planta, massa seca de poda, comprimento de ramo, teor de clorofila, produção, massa de fruto, pH, acidez titulável, sólidos solúveis, teor de antocianinas, atividade antioxidante, compostos fenólicos totais dos frutos, concentração foliar de nutrientes (N, P, K, Ca, Mg, B, Fe, Mn e Zn) e propriedades químicas do substrato. Com o incremento dos níveis de nitrogênio, houve redução do pH, nos teores de Ca e Mg, e elevação do teor de Al no substrato. Nas folhas, houve incremento do teor de N, P e Fe e diminuição de Ca, Zn, Mn e B. A maior produção foi obtida com a dose estimada de 7,37 g planta -1 de N. Em relação aos compostos funcionais, houve incremento linear para a atividade antioxidante e dos compostos fenólicos com o incremento da adubação nitrogenada. Conclui-se que a adubação nitrogenada com sulfato de amônio influenciou na composição química do substrato, no teor foliar de nutrientes, no crescimento vegetativo, na produção e na qualidade dos frutos de mirtileiro.Palavras-chave adicionais: nutrição mineral; pH; sulfato de amônio; Vaccinium.

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Section: Resultssupporting

confidence: 89%

Nitrogen fertilizer affects the chemical composition of the substrate, the foliar nutrient content, the vegetative growth, the production and fruit quality of blueberry

et al. 2015

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“…This information is important since some authors have reported that the leaf retention can support the cuttings rooting; according to them, leaves can transport auxins and other metabolic compounds to cuttings basal portion and stimulate the rooting process (Fachinello et al, 2005;Hartmann et al, 2011). The leaves that remain in the cuttings are also responsible to increase the transpiration rates, and this process can keep the cuttings in high hydration levels once there is available water in the substrates, due to the capillary water movement in the xylem vessels, maintaining active the cuttings metabolic activities (Ristow et al, 2011;Fischer et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Blueberry Propagation by Minicuttings in Response to Substrates and Indolebutyric Acid Application Methods

Colombo¹,

Carvalho²,

Cruz³

et al. 2018

JAS

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The nursery plants supply is one of the most important factors that limites blueberries production in some areas, due to some propagation difficulties observed on this species. In this way, this study aimed to evaluate substrates and IBA application methods on 'Powderblue' blueberries (Vaccinium ashei) minicuttings rooting, as well as to verify the rooting development in different periods. The study was divided in two experiments. The first one aimed to evaluate 'Powderblue' blueberry minicuttings rooting in three substrates (pine bark, carbonized rice husk and vermiculite) in response to two indolebutyric acid (IBA) application methods: 50% alcohol solution and talc. The second experiment aimed to evaluate 'Powderblue' blueberry minicuttings rooting using the best substrate recorded in the first trial (pine bark) and two IBA application methods associated to three periods of rooting access, in order to obtain the ideal rooting period and root development. In the first experiment the rooting percentage presented significant difference among the substrates; the higher percentage of rooted minicuttings occurred in pine bark substrate (68%). Regarding the methods used to IBA application, the talc method was more efficient to promote minicuttings rooting. In the second experiment, it was observed an increase in cutting rooting percentage from 55 to 84%, according to the evaluated seasons; however, the IBA application method did not influence the rooting percentage. Therefore, to produce 'Powderblue' blueberry plants from minicuttings it is recommended to use pine bark as substrate and talc as method to IBA application, transplanting the nurseries at 110 days after planting.

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Diferentes substratos na produção de mudas de mirtileiro

Cited by 2 publications

References 7 publications

Nitrogen fertilizer affects the chemical composition of the substrate, the foliar nutrient content, the vegetative growth, the production and fruit quality of blueberry

Nitrogen fertilizer affects the chemical composition of the substrate, the foliar nutrient content, the vegetative growth, the production and fruit quality of blueberry

Blueberry Propagation by Minicuttings in Response to Substrates and Indolebutyric Acid Application Methods

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