Manejo hídrico em viveiro e uso de hidrogel na sobrevivência pós-plantio de Eucalyptus urograndis em dois solos diferentes

Saad, João Carlos Cury; Lopes, Jader Silva; Santos, Talita A. dos

doi:10.1590/s0100-69162009000300007

Cited by 30 publications

(41 citation statements)

References 8 publications

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“…O polímero comercial utilizado (Hydroplan -EB ® ) correspondeu a um produto misto de copolímero reticulado de acrilamida (C 3 H 5 NO) e acrilato de potássio (K 2 S 2 O 8 ) usado para absorver e reter grandes quantidades de água e nutrientes, com as seguintes características: pó, microgrânulos ou grânulos, branco insolúvel em água, com partículas de tamanho que variam de 0,3 a 1,0 mm, aniônico, com 10% de umidade, densidade de 0,8 g.cm -3 e índice de pH utilizável de 5 a 9, que pode disponibilizar até 95% da solução armazenada para a planta (5% retidos a alta tensão), capaz de absorver até 300 vezes sua massa em água e 100 vezes seu volume, sendo compatível com a maioria dos insumos utilizados, porém com capacidade de retenção afetada e vida útil que varia de 1 a 5 anos (SAAD et al, 2009).…”

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INFLUENCIA DO HIDROGEL NO CRESCIMENTO E NO TEOR DE NUTRIENTES DAS MUDAS DE Eucalyptus dunnii

Navroski¹,

Araújo²,

Reiniger³

et al. 2014

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ResumoObjetivou-se avaliar doses do hidro-retentor adicionado ao substrato sobre crescimento, teor nutricional e qualidade de mudas de Eucalyptus dunnii Maiden. O experimento foi realizado em delineamento inteiramente casualizado, com seis tratamentos, constituídos de concentrações crescentes do hidrogel (0; 1,5; 3,0; 4,5 e 6,0 g.L -1). Foram utilizadas seis repetições, cada uma composta por 24 plantas. Aos 90 dias após a semeadura, foi realizada a avaliação de parâmetros morfológicos das mudas e análise nutricional da parte aérea. A dose em torno de 4,5 g.L -1 ocasiona a melhor resposta quanto às variáveis avaliadas, proporcionando maior altura, diâmetro de coleto, massa seca da parte aérea e radicular e índice de qualidade de Dickson. O uso de doses abaixo de 3 g.L -1 ou acima de 4,5 g.L -1 diminuíram a qualidade das mudas. Todos os macronutrientes apresentaram maior teor na parte aérea (caule + folhas) na presença do hidrogel. O teor dos macronutrientes na parte aérea das mudas aumenta com a adição do hidrogel, porém diminui o teor dos micronutrientes. Em geral, o uso do polímero hidro-retentor aumentou a qualidade das mudas de E. dunnii. Palavras-chave: Produção de mudas; polímero hidroretentor; retenção de água e nutrientes; análise nutricional. Abstract Doses of hydrogel influencing growth and nutritional content in seedlings Eucalyptus dunnii.The objective was to evaluate different dosages of hidroretentor added to the substrate on the growth, nutrient content and quality of Eucalyptus dunnii Maiden. The experiment was conducted in a completely randomized design with six treatments, and increasing concentrations of the hydrogel (0, 1.5, 3.0, 4.5 and 6.0 g.L -1 ). Were six replicates, each consisting of 24 plants. At 90 days after sowing was evaluated morphological parameters of seedlings and nutritional analysis of the seedlings. The dose around 4.5 g.L -1 brings the best answer for the variables evaluated, providing greater height, diameter collect, shoot dry mass, root parts and Dickson quality index. The use of doses below 3 g.L -1 or above 4.5 g.L -1 decreased the quality of seedlings. All macronutrients showed higher content in shoots (leaves + stem) in the presence of the hydrogel. The macronutrient content of the shoots of seedlings increases with the addition of the hydrogel, but decreases the content of micronutrients. In general, the use of polymer hidroretentor increased the quality of the seedlings of E. dunnii.

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INFLUENCIA DO HIDROGEL NO CRESCIMENTO E NO TEOR DE NUTRIENTES DAS MUDAS DE Eucalyptus dunnii

Navroski¹,

Araújo²,

Reiniger³

et al. 2014

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“…In this context, Saad et al (2009), comparing soils with different textures, observed higher concentrations of Ca 2+ and Mg 2+ in clayey soil, which according to the authors may have harmed the properties of the hydrogel and decreased its water retention capacity, worsening water stress and increasing the mortality of Eucalyptus urograndis seedlings. Sita et al (2005) also reported the deterioration of the polymer and the reduction in the hydration capacity in the presence of Ca 2+ , Mg 2+ and ionic forms of iron, which is in agreement with Bowman et al (1990), who claimed that, in general, mineral fertilizers contain salts that limit the retention capacity of the polymers.…”

Section: Resultsmentioning

confidence: 83%

Humic substances, purified MAP and hydrogel in the development and survival of Eucalyptus urograndis

Silva

Ferreira

Silva

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe development and survival of Eucalyptus urograndis plants may be influenced by products based on humic fractions of the organic matter, purified MAP and soil conditioners, such as hydrogel. Thus, the present study aimed to evaluate the effect of the commercial products Fertiactyl ® , based on humic substances, purified MAP and hydrogel on the post-planting development and survival of Eucalyptus urograndis. The experiment was conducted in a randomized block design, with 25 treatments and four replicates, each of which consisted of 6 plants. The immersion of the tubes in solution with doses of Fertiactyl ® and purified MAP promoted the increase in the development and survival of the plants. In the preparation of the hydrogel, the use of solution based on Fertiactyl ® and purified MAP reduced the hydration capacity of the water-retaining polymer. With increasing doses, there was a linear increment in the electrical conductivity of the solution, exponentially reducing the hydration capacity of the polymer.Substâncias húmicas, MAP purificado e hidrogel no desenvolvimento e sobrevivência de Eucalyptus urograndis R E S U M OO desenvolvimento e a sobrevivência de plantas de Eucalyptus urograndis podem ser influenciados por produtos à base de frações húmicas da matéria orgânica, MAP purificado e condicionadores de solo, como hidrogel; assim, realizou-se o presente trabalho com o objetivo de avaliar o efeito dos produtos comerciais Fertiactyl ® à base de substâncias húmicas, MAP purificado e hidrogel no desenvolvimento e na sobrevivência em pós-plantio de Eucalyptus urograndis. O experimento foi conduzido em delineamento de blocos casualizados com 25 tratamentos e quatro repetições sendo cada repetição uma parcela composta por 6 plantas. A imersão dos tubetes em solução com doses de Fertiactyl ® e MAP purificado promoveu o aumento no desenvolvimento e na sobrevivência das plantas. No preparo do hidrogel a utilização de solução à base de Fertiactyl ® e MAP purificado reduziram a capacidade de hidratação do polímero hidro-retentor; com o aumento das doses houve aumento linear na condutividade elétrica da solução fazendo com que a capacidade de hidratação do polímero fosse reduzida exponencialmente.

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“…The difference in the growth of rootstocks with the polymer can be attributed to the improved hydraulic properties of substrate, increasing the availability of water (Azevedo et al, 2002;Saad et al, 2009). …”

Section: Rootstocksmentioning

confidence: 99%

Hydrogel polymer in emergency and early growth of citrus rootstocks

Fagundes¹,

Camilo²,

Soares³

et al. 2014

Afr. J. Agric. Res.

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The development of techniques for rapid and uniform emergence of seeds is the alternative to the diversification of citrus rootstocks that were little used due to low vigor compared to 'Rangpur' lime, the main rootstock used in Brazil, but it has shown susceptible to serious disease problems, such as the citrus sudden death (CSD). The addition of the hydrogel polymer to the substrate can increase the uniformity of seed emergence and reduce the time for the production of rootstocks due to the increase in water availability. Thus, the study was done to evaluate the formulation of the substrate with the hydrogel polymer on the uniformity of emergence and early growth of citrus rootstocks. The factorial scheme 3 × 2 × 2 was used, with the factors: Three rootstocks ['Rangpur' lime (Citrus limonia Osbeck), Poncirus trifoliata (L.) and 'Sunki' mandarin (Citrus sunki Hort. ex Tanaka); two formulations of substrate (with and without 0.4 g per container of Hidroplan-EB/HyB-M ® polymer and two environments (greenhouse with an average maximum temperature of 36.6°C and minimum of 17.2°C and growth chamber programmed with temperature to 25°C and a photoperiod of 12 h, distributed in a completely randomized design with four replications and 35 seeds per plot. The emergency velocity index (EVI), the percentage of emergence and early growth of rootstocks were evaluated. Data were subjected to analysis of variance and the means were compared by Tukey test at 5% of probability. The addition of the polymer to the substrate favored the percentage of emergence and EVI of 'Rangpur' lime and of mandarin 'Sunki' seeds in the growth chamber. The 'Rangpur' lime was the rootstock which presented the highest percentage of emergence and uniformity in both environments. The addition of the hydrogel polymer to substrate favored initial growth of citrus rootstocks.

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Manejo hídrico em viveiro e uso de hidrogel na sobrevivência pós-plantio de Eucalyptus urograndis em dois solos diferentes

Cited by 30 publications

References 8 publications

INFLUENCIA DO HIDROGEL NO CRESCIMENTO E NO TEOR DE NUTRIENTES DAS MUDAS DE Eucalyptus dunnii

INFLUENCIA DO HIDROGEL NO CRESCIMENTO E NO TEOR DE NUTRIENTES DAS MUDAS DE Eucalyptus dunnii

Humic substances, purified MAP and hydrogel in the development and survival of Eucalyptus urograndis

Hydrogel polymer in emergency and early growth of citrus rootstocks

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