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All publications of “Renildes Lúcio Ferreira Fontes”

7 results

RATES OF BORON RECOVERED BY DIFFERENT EXTRACTANTS FROM SOILS OF BAHIA AND MINAS GERAIS, BRAZIL, WITH AND WITHOUT LIMING

José Augusto dos Santos, Renildes Lúcio Ferreira Fontes, V Victor Hugo Alvarez, Júlio César Lima Neves, Maurício Paulo Ferreira Fontes, Arlindo Ferreira de Faria, [...]

01/Jul/2015

Information on rates of nutrient recovery by extractants as a function of added doses of the nutrients is scarce, yet necessary for fertilization and liming recommendation systems. The aim of this study was to determine boron recovery rates by boiling water and boiling CaCl2, with and without liming, in soils of the States of Bahia and Minas Gerais, Brazil. We set up three experiments under greenhouse conditions using a (6 × 2 + 9) × 6 factorial arrangement, consisting of […]

Production and quality of roses as affected by boron fertilization

Luiz Antônio Zanão Júnior, Maristela Pereira Carvalho-Zanão, Renildes Lúcio Ferreira Fontes, José Antônio Saraiva Grossi

01/Apr/2014

Many studies have shown the effects of boron (B) application on various crops; however, results on roses are scarce. The aim of this experiment was to evaluate the effects of B on the production and quality of roses (Rosa hybrida Shiny Terrazza®) under controlled conditions. Treatments consisted of five rates of B (0, 1, 4, 8 and 16 mg kg-1) applied in the substrate in a randomized block design with five replicates. We evaluated the cycle; number of flowers per […]

Rose production affected by silicon rates applied to substrate

Luiz Antônio Zanão Júnior, Victor Hugo Alvarez V., Maristela Pereira Carvalho-Zanão, Renildes Lúcio Ferreira Fontes, José Antônio Saraiva Grossi

01/Dec/2013

The use of Si in the cultivation of pot-grown ornamental species in greenhouse has increased the output and quality of the final product. The objective of this study was to evaluate yield and nutrient uptake of two rose cultivars grown in pots under Si application to the substrate. The treatments, arranged in a 2 x 5 factorial design, consisted of two rose cultivars (Yellow Terrazza® and Red White Terrazza®) and five Si doses (0.0; 0.25; 0.50; 0.75 e 1.00 g […]

Effects of nickel and nitrogen soil fertilization on lettuce growth and urease activity

Thomas Carlos Oliveira, Renildes Lúcio Ferreira Fontes, Sebastião Tavares de Rezende, Alvarez V. Víctor Hugo

01/Jun/2013

Nickel is a micronutrient involved in nitrogen metabolism and a constituent of the urease molecule. Plant growth and urease activity were evaluated in lettuce (Lactuca sativa L.) grown in soil-filled pots in a 2 x 8 factorial design with two nitrogen (N) sources and eight Ni rates, with five replications. Nitrogen was applied at 200 mg dm-3 (half the dose incorporated into the soil at seedling transplanting and half top-dressed later) using the sources NH4NO3 (AN) and CO(NH2)2 (Ur). The […]

Rice grown in nutrient solution with doses of manganese and silicon

Luiz Antônio Zanão Júnior, Renildes Lúcio Ferreira Fontes, Júlio César Lima Neves, Gaspar Henrique Korndörfer, Vinícius Tavares de Ávila

01/Oct/2010

Although silicon is not recognized as a nutrient, it may benefit rice plants and may alleviate the Mn toxicity in some plant species. The dry matter yield (root, leaf, sheaths and leaf blade) and plant architecture (angle of leaf insertion and leaf arc) were evaluated in rice plants grown in nutrient solutions with three Mn doses, with and without Si addition. The treatments were arranged in a 2 x 3 factorial [with and without (2 mmol L-1) Si; three Mn doses (0.5; 2.5 and […]

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils

Luiz Antônio Zanão Júnior, Renildes Lúcio Ferreira Fontes, Paulo Henrique Moreira Coelho, Gaspar Henrique Korndörfer, Laércio Zambolim

01/Apr/2010

Spot bloth caused by Bipolaris sorokiniana is an important wheat desease mainly in hot and humid regions. The aim of this study was to evaluate the response of wheat to different sources and modes of Si application, as related to the severity of wheat spot blotch and plant growth, in two Si-deficient Latosols (Oxisols). An greenhouse experiment was arranged in a 2 x 5 factorial completely randomized design, with eight replications. The treatments consisted of two soils (Yellow Latosol and […]

Severity of spot blotch in wheat cultivated with different forms of nitrogen and manganese doses

Luiz Antônio Zanão Júnior, Paulo Henrique Moreira Coelho, Renildes Lúcio Ferreira Fontes, Vinícius Tavares de Ávila, Igor Ken Kawamura

01/Oct/2009

The nitrogen source applied to crops may alter some soil properties such as pH, resulting in changes in the soil nutrient availability and plant nutrient uptake. Manganese (Mn), which can influence the plant susceptibility to diseases, may even affect host-pathogen relationships. The objective of this study was to evaluate the effect of soil application of two N sources and five Mn doses on the severity of the wheat spot blotch disease. Additionally, shoot and root dry matter production, plant Mn […]