|
|
|
| Registros recuperados: 18 | |
|
|
| Cardoso,Antonio Ismael Inácio; Silva,Priscilla Nátaly de L; Colombari,Lidiane F; Lanna,Natália BL; Fernandes,Dirceu M. |
| ABSTRACT Phosphorus is a finite natural resource and the use of gradual-release phosphate sources, associated with an organic compound may favor a more rational use of this nutrient, since organic matter protects P from soil fixation. The aim of this study was to evaluate the effect of phosphorus sources application, associated with organic compound at planting, on single inflorescence type broccoli production and soil chemical properties at the end of the cycle. Eight treatments were evaluated, in a 4 x 2 factorial scheme, using four phosphorus sources [thermophosphate (TM), natural phosphate (NP), reactive natural phosphate (RNP) and triple superphosphate (TSP)]; in the presence (55 t ha-1) and absence of organic compound Visafértil® at planting. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var. italica; Phosphate fertilization; Organic matter; Productivity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200228 |
| |
|
| |
|
|
| Cardoso, Arnon Afonso de Souza; Santos, José Zilton Lopes; Tucci, Carlos Alberto Franco; Farias, Elias Paiva; Moura, Rodolfo Pessoa de Melo. |
| Phosphate fertilization for native perennial species need studies in field conditions and seedling production. This study aimed to evaluate the effect of interaction between phosphorus and lime levels on growth and nutrients content of mahogany (Swietenia macrophylla King.), cultivated on a Yellow Latosol Dystrophic typic, in greenhouse. The experimental design was completely randomized factorial, with three replications. The treatments consisted of six doses of P (11; 22; 44; 66; 88 and 110 mg dm-3) and control treatment (without P fertilization), combined with 500 mg dm-3 of limestone or without limestone addition. The addition of increasing doses of P with lime provided increase on early growth and nutrient contents in seedlings of mahogany, however,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swietenia macrophylla; Phosphate fertilization; Liming. Engenharia Florestal Swietenia macrophylla; Adubação fosfatada; Calagem. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/667 |
| |
|
|
| Souza,Géssica Pereira de; Figueiredo,Cícero Célio de; Sousa,Djalma Martinhão Gomes de. |
| Abstract The objective of this work was to evaluate the effects of soil management systems, cover crops, and phosphate fertilization on soil humic fractions in a long-term experiment. The treatments consisted of conventional tillage and no-tillage with pearl millet (Pennisetum glaucum) or velvet bean (Mucuna aterrima) as cover crops, at two doses of phosphorous: 0 and 100 kg ha-1 P2O5 per year. Soil samples were taken 11 years after the establishment of the experiment and analyzed for soil total organic carbon and carbon content of humic fractions at 0.00-0.05, 0.05-0.10, and 0.10-0.20-m depths. The humic fractions are sensitive to soil management, except free fulvic acid, which was the only one that did not reduce its carbon contents on the surface layer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humic fractions; No-tillage; Organic matter fractions; Phosphate fertilization; Soil fertility; Soil quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901668 |
| |
|
|
| Rogeri,Douglas Antonio; Bortolon,Leandro; Gianello,Clesio; Amorim,Magno Batista. |
| Abstract: The objective of this work was to evaluate remaining P compared with soil clay content as a P buffer index to classify P extracted by the Mehlich-1 (M1) and Mehlich-3 (M3) methods in soils from the state of Rio Grande do Sul, Brazil. The experiment was carried out in a completely randomized design with five P2O5 rates (0, 50, 100, 200, and 400 mg kg-1) and two sucessive corn crops, and three replicates, in 20 representative soils of the state. P extracted by M1 and M3 before crop planting was adjusted to P contents in biomass, considering soil buffer capacity. The division of soils into different buffering classes, based on soil clay or remaining P, improved the capacity of estimating soil available P of both methods. However, there was no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clay content; Phosphate buffer capacity; Phosphate fertilization; Phosphorus adsorption; Soil test. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201203 |
| |
|
|
| Sá,Jerusa Maia e; Jantalia,Cláudia Pozzi; Teixeira,Paulo César; Polidoro,José Carlos; Benites,Vinícius de Melo; Araújo,Adelson Paulo. |
| Abstract: The objective of this work was to evaluate agronomic and P recovery efficiencies of a granulated organomineral phosphate fertilizer (OMF) produced from poultry litter, compared with those of monoammonium phosphate (MAP), in soils with different textures. The experiment followed a 2x2x4+2 factorial arrangement, with two Oxisols (sandy loam and clay loam textures), two sources of P (OMF and MAP), four levels of P (50, 100, 200, and 400 mg kg-1), besides two control treatments without P application. The treatments were evaluated in 10-kg pots filled with soil, during four successive cultivations of corn without replacing the P absorbed by the plants, in order to evaluate the actual and residual effects of the fertilizers. Available P contents in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Biomass accumulation; Phosphate fertilization; P recovery efficiency; Tropical soils. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900786 |
| |
|
| |
|
|
| Reis,Thiago Henrique Pereira; Guimarães,Paulo Tácito Gontijo; Furtini Neto,Antônio Eduardo; Guerra,Antônio Fernando; Curi,Nilton. |
| Research data have demonstrated that the P demand of coffee (Coffea arabica L.) is similar to that of short-cycle crops. In this context, the objective of this study was to evaluate the influence of annual P fertilization on the soil P status by the quantification of labile, moderately labile, low-labile, and total P fractions, associating them to coffee yield. The experiment was installed in a typical dystrophic Red Latosol (Oxisol) cultivated with irrigated coffee annually fertilized with triple superphosphate at rates of 0, 50, 100, 200, and 400 kg ha-1 P2O5. Phosphorus fractions were determined in two soil layers: 0-10 and 10-20 cm. The P leaf contents and coffee yield in 2008 were also evaluated. The irrigated coffee responded to phosphate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee arabica L.; Phosphate fertilization; Phosphorus fractionation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200019 |
| |
|
|
| Schmitt,Djalma Eugênio; Comin,Jucinei José; Gatiboni,Luciano Colpo; Tiecher,Tales; Lorensini,Felipe; Melo,George Wellington Bastos de; Girotto,Eduardo; Guardini,Renato; Heinzen,Janaína; Brunetto,Gustavo. |
| Phosphorus (P) applications to vineyards can cause P accumulation in the soil and maximize pollution risks. This study was carried out to quantify the accumulation of P fractions in sandy soils of vineyards in southern Brazil. Soil samples (layers 0-5, 6-10 and 11-20 cm) were collected from a native grassland area and two vineyards, after 14 years (vineyard 1) and 30 years (vineyard 2) of cultivation, in Santana do Livramento, southern Brazil, and subjected to chemical fractionation of P. Phosphorus application, especially to the 30-year-old vineyard 2, increased the inorganic P content down to a depth of 20 cm, mainly in the labile fractions extracted by anion-exchange resin and NaHCO3, in the moderately labile fraction extracted by 0.1 and 0.5 mol L-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate fertilization; Eutrophication; Vineyards. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200018 |
| |
|
|
| Schmitt,Djalma Eugênio; Comin,Jucinei José; Ceretta,Carlos Alberto; Gatiboni,Luciano Colpo; Tiecher,Tales; Lorensini,Felipe; Heinzen,Janaina; Ambrosini,Vítor Gabriel; Moraes,Marcel Pires de; Brunetto,Gustavo. |
| In vineyards, if phosphate is applied both before planting and at intervals during growth without consideration of technical criteria, the soil P fractions may be increased and their proportions altered. This study was carried out to evaluate the accumulation of P fractions and the parameters of the adsorption isotherm in a sandy Typic Hapludalf soil in vineyards with a history of successive and excessive phosphate fertilization. In December 2010, two vineyards were selected, one 4 and the other 15 years old, in Urussanga, State of Santa Catarina (Brazil). Three trenches were dug in each area and soil was collected from the 0-5, 5-10 and 10-20 cm depth ranges. The soil samples were dried in a forced-air oven, sieved and subjected to chemical analyses, P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate fertilization; Phosphorus chemical fractionation; Phosphorus adsorption isotherms; Environmental contamination; Vitis sp. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500015 |
| |
|
| |
|
|
| Ramos,Sílvio Júnio; Faquin,Valdemar; Rodrigues,Carlos Ribeiro; Silva,Carlos Alberto; Boldrin,Paulo Fernandes. |
| A major constraint to agricultural production in acid soils of tropical regions is the low soil P availability, due to the high adsorption capacity, low P level in the source material and low efficiency of P uptake and use by most of the modern varieties grown commercially. This study was carried out to evaluate the biomass production and P use by forage grasses on two soils fertilized with two P sources of different solubility. Two experiments were carried out, one for each soil (Cambisol and Latosol), using pots filled with 4 dm³ soil in a completely randomized design and a 4 x 2 factorial scheme. The treatments consisted of a combination of four forage plants (Brachiaria decumbens, Brachiaria brizantha, Pennisetum glaucum and Sorghum bicolor) with two P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Use efficiency; Phosphorus use; Phosphate fertilization. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000200011 |
| |
|
|
| Schmitt,Djalma E.; Gatiboni,Luciano C.; Orsoletta,Daniel J. D.; Brunetto,Gustavo. |
| ABSTRACT Phosphorus (P) reacts with chemical and mineralogical constituents in the soil, mainly in tropical and subtropical soils. Therefore, strategies have been used to reduce the adsorption of P to the soil, among them, the formation of complexes that could decrease P adsorption to the soil. Two experiments were carried out to evaluate the formation of organic acid-Fe-P complexes in the laboratory and the efficiency of these complexes on the growth of wheat plants (T. aestivum) grown under greenhouse conditions. In experiment 1, seven low-molecular-weight organic acids (OA) were selected and a protocol for the formation of complexes between organic acid and Fe3+ at pH 4.0 was performed. After stirring, P was added to the organic acid-Fe complex to form... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate fertilization; Available P; Subtropical soils. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000702 |
| |
|
|
| BRUNETTO,GUSTAVO; NAVA,GILBERTO; AMBROSINI,VÍTOR GABRIEL; COMIN,JUCINEI JOSÉ; KAMINSKI,JOÃO. |
| The aim of this study was to evaluate the response to phosphorus (P) and potassium (K) fertilization and to establish the critical levels of P and K in the soil and in the plant tissue in pear trees. Two experiments were conducted in São Joaquim (SC), Brazil. In experiment 1, the plants received annually the application of increasing rates of phosphate fertilizer (0, 40, 80, 120 and 160 kg P2O5 ha-1), while in experiment 2, increasing rates of potassium fertilizer (0, 40, 80, 120 and 160 kg K2O ha-1) were applied annually. In the two experiments, soil was collected annually from the 0-10, 10-20 and 0-20 cm layers, and the available P (experiment 1) and exchangeable K (experiment 2) content was analyzed. Whole leaves were collected annually, which were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pyrus communis L.; Sufficiency level; Phosphate fertilization; Potassium fertilization; Yield. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452015000200507 |
| |
|
|
| Corrêa,Rossini Mattos; Nascimento,Clístenes Williams Araújo do; Souza,Silvana Keely de Sá; Freire,Fernando José; Silva,Gleibson Barbosa da. |
| Crops in general make poor use of phosphorous fertilizer and, as a result, recommended rates and production costs are very high. Phosphorus can be made more readily available to plants by proper management of phosphate fertilization, selecting both, type of fertilizer and application method. This study was carried out to evaluate the efficiency of the natural Gafsa rock phosphate and the triple superphosphate on dry matter production and P uptake by corn plants cultivated in a greenhouse. Fertilizers were applied localized and broadcast/incorporated on to two soils with contrasting phosphorus capacity factors (PCF). Rock phosphate broadcast application was as efficient as triple superphosphate in increasing corn plant dry matter in the Tropudult, with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rock phosphate; Phosphate fertilization; Phosphorus fixation. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200011 |
| |
|
|
| Schmitt,Djalma Eugênio; Brunetto,Gustavo; Santos,Elaine dos; Wagner,Winiciu de Lima; Sete,Paula Beatriz; Souza,Monique; Ambrosini,Vítor Gabriel; Santos,Matheus Ademir dos; Tiecher,Tales; Comin,Jucinei José; Couto,Rafael da Rosa; Gatiboni,Luciano Colpo; Giachini,Admir. |
| ABSTRACT Phosphorus (P) applications at dosages higher than the necessary may cause P buildup in the soil labile fractions and, consequently, pollution of water sources. This study aimed to assess accumulation of P fractions as well as the parameters of adsorption isotherms in soil profiles having a history of application of phosphate fertilizers and cultivated with apple trees. Soil samples were collected from an area with no history of cultivation and 2 apple orchards cultivated for 8 (P8) and 18 (P18) years, in the city of Urubici, Santa Catarina, southern Brazil. Soil samples were air dried, sieved in a 2-mm mesh, and subjected to chemical analyses (P adsorption) besides P chemical fractionation. Applications of phosphate fertilizers to the orchards,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apple orchard; Phosphate fertilization; P chemical fractionation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300422 |
| |
|
|
| Manica,Jonas; Escosteguy,Pedro Alexandre Varella. |
| ABSTRACT: Maintenance fertilization changes with nutrient requirements and partitioning, but these are not well known for oat cultivars. The aim of this study was to evaluate whether phosphorus (P) requirements and partitioning vary among cultivars of oat (Avena sativa L.). The UPFA ‘Ouro’, UPFPS ‘Farroupilha’, IPR ‘Afrodite’, URS ‘FAPA Slava’, ‘Barbarasul’, ‘FAEM 007’, URS ‘Taura’, and ‘URS 21’ were cultivated in a Latosol with high P content in a greenhouse in 2015. Plants were sampled at physiological maturity and divided into roots, stem, leaves, and grain tissues. Phosphorus content and the dry matter weight of these parts were evaluated and the uptake amount and partitioning of P were estimated. The values of these variables differed across... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa L.; Phosphate fertilization; Maintenance fertilization.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200251 |
| |
|
|
| Gerber,Jaqueline Muniz; Nava,Gilberto; Ernani,Paulo Roberto; Ciotta,Marlise Nara; Amarante,Cassandro Vidal Talamini do; Coldebella,Milton César. |
| ABSTRACT: Fertilization of apple orchards with phosphorus (P) has received less attention than with nitrogen and potassium. In Brazil, the information about apple response to soil P addition is meager. The objective of this study was to evaluate the long-term effect of annual soil P addition on quality and mineral composition of apple fruits. The experiment started in 2010, in a commercial orchard located in the São Joaquim, Southern of Brazil. The orchard consisted of ´Fuji Suprema’, planted in high-density on a Haplumbrept soil. Treatments consisted of 0, 40, 80, 120 and 160kg ha-1 P2O5 applied annually starting in 2010 broadcast over the soil surface along the tree row. Evaluations were performed from 2012/2013 through 2014/2015 growing seasons. We... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus x domestica Borkh; Fruit quality; Phosphate fertilization. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900252 |
| |
| Registros recuperados: 18 | |
|
|
|
