Absorção radicular e foliar de 65Zn e sua redistribuição em laranjeiras

Sartori, Raul Henrique; Boaretto, Antonio Enedi; Villanueva, Felipe Carlos Alvarez; Fernandes, Henriqueta Maria Gimenes

doi:10.1590/s0100-29452008000200044

Cited by 14 publications

(13 citation statements)

References 3 publications

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“…Besides this, Zn regulates or makes part of the structure of several other enzymes involved in protein synthesis and in nitrogen metabolism [5,11]. In clayey acid soils, several reactions are responsible for the low Zn availability, which together with the low mobility of Zn in the coffee plant phloem drives to foliar fertilizations in such conditions [12,13]. Also, like other Brazilian coffee producer regions, Zona da Mata is a mountain region in which manually done foliar sprays are time-consuming and costly.…”

Section: Introductionmentioning

confidence: 99%

Boron, Copper, and Zinc Affect the Productivity, Cup Quality, and Chemical Compounds in Coffee Beans

Clemente

Martínez

Pedrosa

et al. 2018

Journal of Food Quality

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Micronutrients perform speci c and essential functions in plant metabolism, and their de ciency may lead to metabolic disturbances that a ect co ee production and quality beverage. In Brazil, the B, Cu, and Zn are the main micronutrients, and these are provided by soil or foliar fertilization, frequently with low recovery e ciency. is work objected verifying the feasibility of supplying of B, Cu, and Zn via insertion of tablets in the orthotropic branch of Co ea arabica, as well as to evaluate the co ee plant response in terms of productivity and quality of the beverage. Adult plants received B, Cu, and Zn, each micronutrient alone or combined with the other two, by foliar fertilization or by tablets inserted in the trunk base. e productivity, cupping quality, and some chemical indicators of beans quality were evaluated in two crop seasons. Boron, copper, and zinc supplied by foliar spray or solid injections in the trunk in uenced the chemical composition and quality of the co ee beans, characterized by the cupping test and the levels of ca eine, trigonelline, sucrose, glucose, arabinose, mannose, 3-ca eoylquinic acid, 5-ca eoylquinic acid, polyphenol oxidase activity, and total phenolic compounds. Copper and zinc were equivalent in either form of supply regarding the production and quality of co ee.

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Section: Introductionmentioning

confidence: 99%

Boron, Copper, and Zinc Affect the Productivity, Cup Quality, and Chemical Compounds in Coffee Beans

Clemente

Martínez

Pedrosa

et al. 2018

Journal of Food Quality

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“…However, tolerance of plants to excess Mn has been shown to be associated with limited absorption and transport of the element to the shoots and/or tolerance to high levels at the cellular level (Hall, ). Although no specific assessment was performed in this study, the Mn concentrations in young leaves of approximately 1000 mg kg −1 suggest that citrus does not present efficient mechanisms for alleviating toxicity, on the contrary observed with excess Cu (Alva, ) and Zn, which accumulate mostly in the plant roots and woody tissues (Sartori et al , ).…”

Section: Discussionmentioning

confidence: 72%

Towards soil management with Zn and Mn: estimates of fertilisation efficacy of Citrus trees

Hippler¹,

Boaretto²,

Quaggio

et al. 2015

Annals of Applied Biology

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Nutrient management recommendations for fruit crops lack the understanding of the efficiency of soil fertilisation with manganese (Mn) and zinc (Zn), which could substitute, in part, the traditional foliar applications. Fruit yield of trees in response to Zn and Mn supply via soil may be limited either by sorption reactions with soil colloids or low solubility of fertilisers. We investigated the effects of fertiliser sources and rates of Mn and Zn applied to soils with different sorption capacities on nutrient uptake, biochemical responses and biomass of Citrus. Two experiments were carried out with 2-year-old sweet orange trees that received applications of Mn or Zn. The first experiment evaluated the application of Mn fertilisers (MnCO 3 and MnSO 4 ) at three levels of the nutrient (0, 0.7 and 3.5 g plant −1 of Mn) in two types of soil (18.1% and 64.4% of clay, referred to as sandy loam and clay soils, respectively). The second experiment, likewise, evaluated Zn fertilisers (ZnO and ZnSO 4 ) and nutrient levels (0, 1.0 and 5.0 g plant −1 of Zn). Application of Mn and Zn increased nutrient availability in the soils as well as leaf nutrient concentrations in the trees. The lowest rates, 0.7 g plant −1 of Mn and 1.0 g plant −1 of Zn, both as sulphate, were sufficient to supply these micronutrients to sufficient levels in leaves, flowers and fruits. Metal toxicity to plants occurred with higher doses of both nutrients and to a large extent in the sandy soil. In this case, protein bands lower than 25 kDa were observed as well a decrease on leaf chlorophyll content. In the clay soil, despite increased micronutrient concentrations in the plant, responses were less pronounced because of higher adsorption of metals in the soil. Superoxide dismutase (SOD, EC 1.15.1.1) isoenzyme activity was determined by non-denaturing polyacrylamide gel electrophoresis (PAGE). The Cu/Zn-SOD isoenzymes increased with increased Zn rates, but in contrast, when Mn was applied at the highest rate, the activity of Cu/Zn-SODs decreased. The SOD activity pattern observed indicated increased production of superoxide and consequently an oxidative stress condition at the highest rates of Zn and Mn applied. The results demonstrated that the soil application of Mn and Zn can supply nutrient demands of orange trees, however the low solubility of fertilisers and the high sorption capacity of soils limit fertilisation efficiency. On the contrary, application of sulphate source in sandy soils may cause excess uptake of Mn and Zn and oxidative stress, which impairs the photosynthetic apparatus and consequently tree growth.

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“…De acordo com Quaggio et al (2003), em experimento de adubação com boro e zinco no solo em complementação à aplicação via foliar em laranjeira Pêra, a produtividade máxima foi alcançada com 3,0 mg dm -3 de Zn no solo na camada de 0-0,2 m, valor inferior ao teor encontrado no presente experimento. A contribuição do Zn do solo no teor de Zn na folhas de laranjeira também foi verificada por Sartori et al (2008a).…”

Section: Concentração De Zinco Nas Folhasunclassified

“…Miranda et al (2010) ressaltam que para algumas condições, como por exemplo, no caso de micronutrientes, a aplicação via foliar, durante o ciclo em que foi detectada a deficiência, pode mitigar efeito negativo na produtividade. Na citricultura, existem pesquisas que demonstram a eficiência da aplicação foliar do Zn, Mn, B e Fe (SANTOS et al, 1999, TARIQ et al, 2007, PAPADAKIS et al, 2007, SARTORI et al, 2008aAHMAD, 2010), porém é necessário aplicá-los a cada fluxo de vegetação nova, já que os nutrientes aplicados na vegetação anterior não se redistribuem para os tecidos novos (SARTORI et al, 2008b, BOARETTO et al, 2002.…”

Section: Introductionunclassified

Concentração foliar de manganês e zinco em laranjeiras adubadas com óxidos e carbonatos via foliar

Godoy¹,

Bôas²,

Yanagiwara³

et al. 2013

Rev. Ciênc. Agron.

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RESUMO -, proporcionaram, respectivamente, níveis nutricionais adequados de Mn e Zn nas folhas de laranjeira. Na ausência de chuvas, os teores adequados de Mn e Zn no solo, não permitem suprir satisfatoriamente as laranjeiras Pêra enxertadas em limoeiro cravo. Palavras-chave:Citrus sinensis L.. Adubação Foliar. Micronutrientes. Laranja.ABSTRACT -Among micronutrients, Zn and Mn limit the production of citrus in Brazil. Foliar application has been the traditional form of supply, however the efficiency of this type of fertilization depends on a number of factors, including the type of fertilizer used. Two experiments were conducted in an orchard of seven year old Pêra orange, grafted onto Rangpur lime, in Botucatu, São Paulo. In the first experiment three sources of Mn, applied via foliar application, were evaluated: manganese carbonate A, manganese carbonate B and manganese sulphate, at two rates per fertilizer, corresponding to 250 and and 500g ha -1 of Mn, plus a control sprayed with water only. In the second experiment three sources of Zn were tested for foliar application: zinc oxide A, zinc oxide B and zinc sulphate at two rates per fertilizer, corresponding to 375 and 750g ha -1 of Zn, plus the control. Samples of leaves were collected monthly, beginning 30 days after application of the treatments. The foliar application of manganese carbonate B at a rate of 500g ha -1 Mn, and zinc oxide B at a rate of 750g ha -1 , each provided adequate nutritional levels of Mn and Zn in the leaves of the orange. With the absence of rain, the appropriate levels of Mn and Zn in the soil are not enough to supply the Pêra orange grafted onto Rangpur lime.

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Absorção radicular e foliar de 65Zn e sua redistribuição em laranjeiras

Cited by 14 publications

References 3 publications

Boron, Copper, and Zinc Affect the Productivity, Cup Quality, and Chemical Compounds in Coffee Beans

Boron, Copper, and Zinc Affect the Productivity, Cup Quality, and Chemical Compounds in Coffee Beans

Towards soil management with Zn and Mn: estimates of fertilisation efficacy of Citrus trees

Concentração foliar de manganês e zinco em laranjeiras adubadas com óxidos e carbonatos via foliar

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