Biomass production, B accumulation and Ca/B ratio in Eucalyptus under various conditions of water availability and B doses

Ramos, Sílvio Júnio; Faquin, Valdemar; Ávila, Fabrício William; Ferreira, Rose Myrian Alves; Araújo, Josinaldo Lopes

doi:10.1590/s0104-77602013000200013

Cited by 6 publications

(7 citation statements)

References 6 publications

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“…Among the nutrients of great importance for the crop, there is also boron (B), which has as the main mechanism of transport in the soil the mass flow, which is influenced by the water deficit (Ramos et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Silicon and boron mitigate the effects of water deficit on sunflower

Neves

Aquino

Berger

et al. 2019

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate the effect of Ca and Mg silicate and B on the gas exchange, leaf water potential and chlorophyll fluorescence parameters in the sunflower variety Embrapa 122 -V2000 under water stress conditions. The trial was conducted in Red Yellow Latosol with very clayey texture, with contrasting levels of Si and B and subjected to water deficit. The experimental design was randomized blocks in a 2 4 factorial arrangement, with five replicates. Treatments consisted of the combination of two acidity corrective agents (calcium magnesium silicate and dolomitic limestone), two levels of base saturation (30 and 70%), two levels of B (0.18 mg dm -3 -value available in the soil and 1.20 mg dm -3 ) and two water regimes (with and without water stress from the beginning of flowering). It can be concluded that the supply of Si and B can reduce the damage to sunflower caused by water stress.Silício e boro atenuam os efeitos do déficit hídrico sobre o girassol RESUMO: Objetivou-se avaliar o efeito do silicato de Ca e Mg e do B sobre as trocas gasosas, potencial hídrico foliar e parâmetros da fluorescência da clorofila na variedade de girassol Embrapa 122-V2000, em condições de deficiência hídrica. O ensaio foi realizado em Latossolo Vermelho-Amarelo de textura muito argilosa, com níveis contrastantes de Si e B, e submetido à deficiência hídrica. O delineamento experimental foi em blocos casualizados, num arranjo fatorial 2 4 , com cinco repetições. Os tratamentos foram constituídos da combinação de dois materiais corretivos de acidez (silicato de cálcio e magnésio e calcário dolomítico), dois níveis de saturação por bases (30 e 70%), dois níveis de B (0,18 mg dm -3 valor disponível no solo e 1,20 mg dm -3 ) e dois regimes hídricos (sem e com deficiência hídrica a partir do início do florescimento). O suprimento de Si e B podem reduzir os danos causados ao girassol pela deficiência hídrica. Palavras-chave:Helianthus annuus, fluorescência da clorofila, trocas gasosas, potencial hídrico foliar

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Section: Introductionmentioning

confidence: 99%

Silicon and boron mitigate the effects of water deficit on sunflower

Neves

Aquino

Berger

et al. 2019

Rev. bras. eng. agríc. ambient.

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“…Thus, a greater water capacity retention had fundamental importance to guarantee gains in productivity. Ramos et al [16] describes soil moisture as an important parameter to B uses in the soil by C. citriodora. It's also important to emphasize that water deficit interferes in B uptake in eucalyptus, causing shoot dieback, especially in young plants.…”

Section: +mentioning

confidence: 99%

“…In sandy soils B may be leached during the rainy season, on the other hand, in clayey soils, B may be adsorbed in the organic and inorganic fraction, being the soil type directly related to nutrient deficiency occurrence [29]. Ramos et al [16] observed that B distribution in plant tissues of C. citriodora was directly influenced by the amount of nutrient available, in other words, by nutritional status. Ferreto et al [3] evaluated the relation between B and liming in Eucalyptus cultivated in sandy soils and observed that limed soils showed higher B availability at the same time taht plants showed a higher B concentration in shoots and roots.…”

Section: ) Of C Citriodora Cultivated In Two Different Soil Typesmentioning

confidence: 99%

Soil Fertilization and Texture on Boron Accumulation and Wood Volume in Corymbia citriodora (Hook) K.D. Hill & L.A.S Johnson

Pinheiro

Caiafa

Pinheiro

et al. 2019

JEAI

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This study aimed to evaluate the effects of soil fertilization and texture on leaf Boron (B) accumulation and its relation with wood volume of Corymbia citriodora Hill & Johnson. The experiment was set in randomized block with four replications, four B fertilization levels (0, 1.1, 2.2 and 4.4 g.plant-1) in two soils types (sandy and clayey). To determine leaf B content, 25 leaves were collected from the median portion of four trees for each treatment. Leaves were dried on oven and B content was determined by the Azomethine-H method using extract obtained by dry digestion. The diameter at breast height and the total height of 25 trees were collected in all treatments and wood volume was calculated. Data were submitted to analysis of variance and the means adjusted to regression equations. The regression coefficients were evaluated by t-test at 1 and 5% probability. It was verified that clay soil produces more wood, compared to sandy soil. There was a gain increase in foliar B as B doses increased in both soil types. Leaf B affected Corymbia citriodora productivity only in clay soil.

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“…Improved accumulation of B by eucalyptus root can increase B in the shoot, which improves B use in metabolic processes and eucalyptus, optimizing its growth. In Brazilian eucalyptus plantations, water stress decrease B soil availability, reducing uptake and B flux to shoot, an stimulus to plant increases its demand for B (RAMOS et al, 2013). Increase in B accumulated by plants due to application of HA can be used in the field as a practice to improve eucalyptus B nutrition, with the use of low HA concentrations.…”

Section: Nutrient Accumulationmentioning

confidence: 99%

Nutrient acquisition and eucalyptus growth affected by humic acid sources and concentrations

Morais

Silva

Rosa

2018

SCA

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Humic acid (HA) can increase eucalyptus growth due to its biostimulant effect and improvement in plant nutrient uptake. Magnitude of these stimuli varies according to the source, chemical composition, presence of bioactive fragments, and concentration of HA. The aim of this study was to evaluate the effect of HA sources and concentrations on dry matter, accumulation and uptake efficiency (UpE) of nutrients for eucalyptus seedlings cultivated in nutrient solution. A randomized block experimental design was adopted, with four replications, in a 3x4+1 factorial scheme, in which three sources of HA (HA-L1 and HA-L2, derived from different commercial HA extracted from leonardite with 0.5 mol L -1 NaOH and 0.5 mol L -1 KOH, respectively, and HA-Com, which was extracted from compost with 0.5 mol L -1 KOH) were combined with four concentrations of C-HA (5, 10, 25, and 100 mg L -1 ) as well as a control treatment in which eucalyptus was cultivated without HA. Eucalyptus seedlings were grown for 20 days, maintaining three plants per pot. At the end of the experiment, production of shoot dry matter (SDM), root dry matter (RDM), and total dry matter (TDM); the Root: Shoot dry matter ratio; and the accumulations of N, P, K, Ca, B, Cu, Fe, and Zn in the shoot and root were evaluated as well as the UpE of these nutrients by the seedlings. Maximum production of SDM was reached at the concentrations of 14 and 13.5 mg L -1 of C-HA, for HA-L1 and HA-Com, respectively. The RDM increased with the use of HA-Com, with optimal concentration of 55 mg L -1 of C-HA. Accumulation of Fe in the eucalyptus shoot decreased in HA-treated pots, compromising Fe translocation from the root to the shoot. Regardless of HA source used, Cu accumulation by plants diminishes as C-HA concentration increases. A greater growth of eucalyptus at concentrations lower than 15 mg L -1 of C-HA occurs more through the stimulus to shoot and root growth than due to greater acquisition and UpE of nutrients by plants. Use of high concentrations of C-HA requires greater concentration of some micronutrients in the nutrient solution tested. Key words: Nutrient uptake. Bioactivity of humic fragments. Organic-metallic complexes. Uptake efficiency of nutrients. Humic substances. ResumoO ácido húmico (AH) pode aumentar o crescimento do eucalipto devido a seu efeito bioestimulante e aumento da absorção de nutrientes pelas plantas. A magnitude desses estímulos varia conforme a fonte, composição química, presença de fragmentos bioativos e concentração de AH. Objetivouse, assim, avaliar o efeito de fontes e concentrações de AH na massa seca, aquisição e eficiência de absorção (EAbs) de nutrientes por mudas de eucalipto cultivadas em solução nutritiva. O experimento foi realizado em delineamento de blocos casualizados, com quatro repetições, em esquema fatorial 3x4+1, sendo testadas três fontes de AH (AH-L1 e AH-L2, derivados de diferentes produtos comerciais de AH, tendo como material de extração leonardita, sendo extraídos com NaOH 0,5 mol L -1 e KOH 0,5 mol L -1 , res...

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Biomass production, B accumulation and Ca/B ratio in Eucalyptus under various conditions of water availability and B doses

Cited by 6 publications

References 6 publications

Silicon and boron mitigate the effects of water deficit on sunflower

Silicon and boron mitigate the effects of water deficit on sunflower

Soil Fertilization and Texture on Boron Accumulation and Wood Volume in Corymbia citriodora (Hook) K.D. Hill & L.A.S Johnson

Nutrient acquisition and eucalyptus growth affected by humic acid sources and concentrations

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