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Registros recuperados: 6
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Agronomic efficiency of polymer-coated triple superphosphate in onion cultivated in contrasting texture soils Rev. Ciênc. Agron.
Chagas,Wantuir Filipe Teixeira; Guelfi,Douglas Ramos; Emrich,Eduardo Bucsan; Silva,André Leite; Faquin,Valdemar.
ABSTRACT Information related to phosphate fertilization and coated phosphate fertilizer in onion is scarce. Thus, this study was carried out to evaluate agronomic efficiency, production and nutritional characteristics of triple superphosphate coated with polymers in onion cultivated in contrasting texture soils. Two experiments were carried out under protected conditions in pots containing 5 kg soil. The experimental design was completely randomized with treatments arranged in a 2 x 5 factorial: triple superphosphate (TSP) and polymer-coated triple superphosphate (TSP+P) applied in five phosphorus rates: Dystroferric Red Latosol (LVdf) (clayey) = 0; 100; 200; 400; 800 mg P2O5 kg-1, and Quartzarenic Neosol (sandy) = 0; 75; 150; 300; 600 mg P2O5 kg-1, with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allium cepa L.; Coated fertilizers; Phosphorus.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300439
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Ammonia and carbon dioxide emissions by stabilized conventional nitrogen fertilizers and controlled release in corn crop Ciência e Agrotecnologia
Souza,Taylor Lima de; Guelfi,Douglas Ramos; Silva,André Leite; Andrade,André Baldansi; Chagas,Wantuir Filipe Teixeira; Cancellier,Eduardo Lopes.
ABSTRACT The market of stabilized, slow and controlled release nitrogen (N) fertilizers represents 1% of the world fertilizer consumption. On the other hand, the increase in availability, innovation and application of these technologies could lead to the improvement of N use efficiency in agroecossystems and to the reduction of environmental impacts. The objective of this study was to quantify agronomic efficiency relative index, ammonia volatilization, and CO2 emissions from conventional, stabilized and controlled release N fertilizers in corn summer crop. The experiment was carried out in a corn crop area located in Lavras, state of Minas Gerais, Brazil, without irrigation. All treatments were applied in topdressing at rate of 150 kg ha-1 N. N-NH3 losses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CO2; NH3 loss; No-tillage; Zea mays L..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500494
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Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system Ciência e Agrotecnologia
Chagas,Wantuir Filipe Teixeira; Guelfi,Douglas Ramos; Caputo,André Luiz Carvalho; Souza,Taylor Lima de; Andrade,André Baldansi; Faquin,Valdemar.
ABSTRACT Application of stabilized and controlled-release urea blends can reduce the losses of N-NH3 as compared to conventional urea. The aim of this study was to quantify ammonia volatilization from conventional nitrogen fertilizers and blends of urea + (urea + NBPT) + controlled release urea applied in drip irrigated coffee system. The experiment was conducted under field conditions in in a Red Latosol located in Lavras-MG, Brazil. The randomized complete block design with six treatments: Urea = 450 kg ha-1 yr-1 N (100% of the recommended dose) divided in three splittings equal to 150 kg ha-1 N with an interval of 50 days; ammonium nitrate = 450 kg ha-1 yr-1 N (100% of the recommended dose) in three splittings equal to 150 kg ha-1 N with an interval of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation; Nitrogen fertilizer technologies; Polymer-sulfur coated urea.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000500497
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Amylose content and micromorphology of popcorn progenies with different popping expansion volumes Ciência Rural
Freire,Ana Izabella; Castro,Elisa de Melo; Pereira,Ariana Mota; Cruz,Renata Ranielly Pedroza; Souza,Filipe Bittencourt Machado de; Chagas,Wantuir Filipe Teixeira; Souza,João Cândido de.
ABSTRACT: Popcorn (Zea mays var. everta) has a higher commercial value than common maize, in addition to being a popular food among consumers. Today, there is a constant search for cultivars with superior performance for several traits of interest in the case of popcorn, yield and popping expansion. On this basis, this project proposes to characterize progenies of popcorn with different values ​​of expansion capacity regarding chemical composition and micromorphology. Kernels from the fifth cycle (C5) of intrapopulation recurrent selection were evaluated. The progenies were selected based on the popping expansion volume of their kernels. The kernels were quantified for amylose and analyzed for starch granule arrangement and pericarp thickness by scanning...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays var. everta; Endosperm; Pericarp; Starch granule; Thickness..
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200401
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Monoammonium phosphate coated with polymers and magnesium for coffee plants Ciência e Agrotecnologia
Guelfi,Douglas Ramos; Chagas,Wantuir Filipe Teixeira; Lacerda,Jordana Reis; Chagas,Rafael Mattioli Rezende; Souza,Taylor Lima de; Andrade,André Baldansi.
ABSTRACT The coating of phosphate fertilizer granules with polymers and magnesium (Mg) is a technology that can improve phosphorus (P) use efficiency and mitigate problems of low Mg supply in coffee crops. The objective of this work was to evaluate the growth and nutrition characteristics of coffee seedlings and the agronomic efficiency (AE) of monoammonium phosphate (MAP) coated with anionic polymers and Mg in comparison with other phosphate fertilizer technologies. The experiment was carried out in a greenhouse in 20 L pots. Two five-month-old coffee seedlings were transplanted into each pot. The experimental design was completely randomized with three replicates. The following treatments, applied at a dose corresponding to 20 g pot-1 of P2O5, were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Agronomic efficiency; Fertilizer technologies; Monoammonium phosphate; Synergism..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000300261
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Productive characteristics, nutrition and agronomic efficiency of polymer-coated MAP in lettuce crops Rev. Ciênc. Agron.
Chagas,Wantuir Filipe Teixeira; Emrich,Eduardo Bucsan; Guelfi,Douglas Ramos; Caputo,André Luiz Carvalho; Faquin,Valdemar.
In contrast to enhanced-efficiency nitrogen fertilisers, principally urea, phosphate fertilisers have been little studied and the available information is limited. The aim of this work therefore was to evaluate the productive and nutritional characteristics and the agronomic efficiency of a polymer-coated MAP fertilizer on two subsequent lettuce crops. The experiment was carried out in a greenhouse, in pots with a capacity of 4 kg, filled with a dystrophic yellow Latosol of a clayey texture. The experimental design was completely randomised and the treatments arranged in a 2 x 5 factorial scheme: two sources of phosphorus (P) (MAP and polymer-coated MAP), applied to the plots in five dosages (0, 100, 200, 400, 800 mg P2O5 kg-1) with three replications. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phosphate fertilizer; Residual effect; Lactuca sativa L.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200266
Registros recuperados: 6
Primeira ... 1 ... Última
 

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