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| Registros recuperados: 18 | |
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| Silva,Alexsandro Oliveira da; Silva,Davi José; Bassoi,Luis Henrique. |
| ABSTRACT In the semiarid region of Brazil the use of irrigation systems for applying fertilizers in horticulture is the primary means for incorporating nutrients in the soil. However, this technique still requires its use in wine vines to be assessed. In view of this, this study aimed to assess nitrate and potassium concentrations in soil fertigated with nitrogen and potassium fertilizers in 3 wine grape growing cycles. A field experiment was conducted with 'Syrah' wine grapes, in Petrolina, Pernambuco, Brazil; it assessed five nitrogen doses (0, 15, 30, 60 and 120 kg ha-1) and five K2O doses (0, 15, 30, 60 and 120 kg ha-1) applied by drip irrigation system with two emitters per plant, with a flow rate of 4 L h-1. The experimental design used was the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera L; Soil solution; Fertigation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000300305 |
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| Mendieta Muñoz, Lorenzo Antonio. |
| Con el objeto de conocer el movimiento espacio-temporal de los nutrientes en el bulbo húmedo de un suelo vertisol se estableció un experimento en una parcela comercial para la producción de fresa en Zamora, Michoacán, con extractores de solución (ESS) comúnmente denominados “chupatubos”, éstos se instalaron en macro-túneles con fresas, en tres profundidades (10, 20 y 30 cm), se consideraron tres repeticiones por cada profundidad y fueron distribuidos completamente al azar en 2 hectáreas. El estudio se realizó durante 18 semanas. Los análisis químicos de la solución del suelo se realizaron por espectrofotometría AES-ICP en un equipo Varian, Liberty II y se determinó determinó P, K, Ca, Mg, Fe, Mn, Zn, Cu Na y B. Se observaron diferencias estadísticas... |
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Palavras-chave: Fragaria vesca L.; Solución del suelo; Extractores de solución; Tensiómetro; Soil solution; Solution extractors; Tensiometer; Maestría; Edafología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/378 |
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| 谷, 昌幸; 佐藤, 貴之; 近藤, 錬三; Tani, Masayuki; Sato, Takayuki; Kondo, Renzo. |
| 泥炭からの土壌溶液の採取方法が土壌溶液の組成・特徴に及ぼす影響を4つの方法で比較検討した.対象とした泥炭地は,泥炭の分解度と理化学性が異なる霧多布泥炭地と湧洞沼泥炭地の2地点で,各地点において2×2mの方形区内の4カ所から泥炭および土壌溶液を採取した.減圧ポーラスカップ法(PC法),遠心分離法(CF法),振とう水抽出法(WE法),および泥炭地で一般的に用いられている泥炭を採掘した坑に湧出する水を採取する方法(PW法)の4つの溶液採取方法を用いた.1)各地点4カ所の泥炭の全炭素・窒素含量,繊維含量,腐植化度などの分解度指標および理化学性の変動係数は,おおむね20%以下であった.2)土壌溶液の水質および無機イオン濃度は4つの方法で大きく異なった.PC法,CF法,WE法で採取した土壌溶液は,泥炭の分解程度の違いによって水質が大きく変化することが示された.また,溶存有機物の光学的な特性も採水方法の違いにより異なった.3)PW法により採取した溶液のEC,溶存有機炭素濃度などの水質の変動係数は,両地点とも約20%以下であり,最もばらつきが少なかった.4)PC法,CF法およびWE法により採取した溶液の水質の変動係数は,泥炭の理化学性の変動係数を大きく上回る項目が多かった.また,これら3つの方法により採取した溶液の水質および無機イオン濃度は,泥炭に含まれる植物繊維の影響を強く受けていると考えられた. The soil solutions in surface peat soils were collected by using four methods : the peatland water method (PW), by which the seepage water in a pit of peatland was... |
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Palavras-chave: 採取方法; 泥炭; 土壌溶液; 無機イオン組成; 溶存有機物; Dissolved organic matter; Inorganic ion composition; Peat; Sampling methods; Soil solution. |
| Ano: 2003 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2967 |
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| Conti,Lessandro De; Ceretta,Carlos Alberto; Couto,Rafael da Rosa; Ferreira,Paulo Ademar Avelar; Silva,Lincon Oliveira Stefanello da; Piccin,Rogério; Lourenzi,Cledimar Rogério; Girotto,Eduardo; Brunetto,Gustavo. |
| Abstract: The objective of this work was to evaluate the effect of pig slurry applications on the exchangeable Al content, activity, and distribution of Al chemical species in the soil solution. Soil samples of a Typic Hapludalf were obtained from an experiment conducted during eight years, with 19 applications of 0, 20, 40, and 80 m3 ha-1 pig slurry. The soil samples were collected in stratified layers to determine exchangeable Al content and to extract the soil solution by the saturated soil paste method. The concentrations of the main cations and anions, dissolved organic carbon, and pH in the soil solution were determined. The distribution of the chemical species of Al and the activity of the Al3+ species were obtained through the Visual Minteq... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inorganic ligand; Organic amendment; Phytotoxicity; Soil solution. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000914 |
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| De Conti,Lessandro; Ceretta,Carlos Alberto; Ferreira,Paulo Ademar Avelar; Lorensini,Felipe; Lourenzi,Cledimar Rogério; Vidal,Renan Fagan; Tassinari,Adriele; Brunetto,Gustavo. |
| The application of pig slurry rates and plant cultivation can modify the soil phosphorus (P) content and distribution of chemical species in solution. The purpose of this study was to evaluate the total P, available P and P in solution, and the distribution of chemical P species in solution, in a soil under longstanding pig slurry applications and crop cultivation. The study was carried out in soil columns with undisturbed structure, collected in an experiment conducted for eight years in the experimental unit of the Universidade Federal de Santa Maria (UFSM), Santa Maria (RS). The soil was an Argissolo Vermelho distrófico arênico (Typic Hapludalf), subjected to applications of 0, 20, 40, and 80 m3 ha-1 pig slurry. Soil samples were collected from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic wastes; Soil solution; Chemical speciation; Visual Minteq. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300774 |
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| Silva,Davi José; Bassoi,Luís Henrique; Rocha,Marlon Gomes da; Silva,Alexsandro Oliveira da; Deon,Magnus Dall’Igna. |
| ABSTRACT Viticulture is an activity of great social and economic importance in the lower-middle region of the São Francisco River valley in northeastern Brazil. In this region, the fertility of soils under vineyards is generally poor. To assess the effects of organic and nitrogen fertilization on chemical properties and nitrate concentrations in an Argissolo Vermelho-Amarelo (Typic Plinthustalf), a field experiment was carried out in Petrolina, Pernambuco, on Syrah grapevines. Treatments consisted of two rates of organic fertilizer (0 and 30 m3 ha-1) and five N rates (0, 10, 20, 40, and 80 kg ha-1), in a randomized block design arranged in split plots, with five replications. The organic fertilizer levels represented the main plots and the N levels, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertigation; Soil solution; Carbon; Micronutrients; Vitis vinifera. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100503 |
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| Hahn,Leandro; Paviani,Angela Cristina; Feltrim,Anderson Luiz; Wamser,Anderson Fernando; Rozane,Danilo Eduardo; Reis,André Rodrigues dos. |
| ABSTRACT The recommendations of nitrogen (N) fertilization in garlic are still based on different varieties of the current types that are infected with phytopathogenic virus. There are several methods for recommendation of nitrogen (N) fertilization in garlic, but there are no enough methods for N diagnosis in garlic obtained by meristem culture. The objective of this work was to evaluate methods for diagnosing the nutritional status of virus-free garlic subjected to N doses through the use of a specific NO3- meter in soil solution and foliar sap, portable chlorophyll meter, N content in the leaf, and its relationship with yield and quality of the bulbs. The experiments were conducted with the use of virus-free seed bulbs from the meristem culture from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum; Relative chlorophyll content; Soil solution; Nitrate in foliar sap; Nitrate in soil solution. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100502 |
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| Nunes Júnior,Edivan S.; Medeiros,José F. de; Oliveira,Francisco de A. de; Lima,Luan A.; Bezerra,Francisco M. S.; Alves,Rita de C.. |
| ABSTRACT The objective of the study was to evaluate the effect of different managements of fertigation and NK doses on the production of bell pepper fruit in a protected environment. The experimental design was randomized blocks in 3 x 5 factorial. The treatments were formed by the combination of three managements of fertigation (M1 - Based on the rate of absorption; M2 - Monitoring the electrical conductivity of the soil solution; M3 - Monitoring concentrations of N and K ions in the soil solution), with five doses of NK (0, 50, 100, 150 and 200% of the recommended dose) and four replicates. Six samples were collected and the following variables were evaluated: number, length and diameter of fruit, pulp thickness and fruit production. Except for diameter,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum L.; Soil solution; Salinity; Ionic concentration. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300186 |
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| Silva,Alexsandro Oliveira da; Bassoi,Luis Henrique; Silva,Davi José. |
| Abstract Fertigation can increase the efficiency of fertilizer application and facilitate the nutritional management of a crop. Thus, nitrate and potassium movements in a sandy loam soil were evaluated as function of fertilizer doses during three growing seasons of the grapevine cv. Syrah grafted on Paulsen 1103 rootstock (June to October 2013, February to June 2014, and August to November 2014) in Petrolina, state of Pernambuco, Brazil. Five doses of N (0, 15, 30, 60 and 120 kg ha-1) and five doses of K2O (0, 15, 30, 60 and 120 kg ha-1) were combined in a fractional 52 factorial design, totaling 13 combinations, in a randomized blocks experiment with four replications. The concentrations of nitrate and potassium in the soil solution were determined.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation management; Porous cup extractor; Soil solution. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000503003 |
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| Fernandes,Flávia Carvalho Silva; Libardi,Paulo Leonel; Carvalho,Laércio Alves de. |
| Excessive nitrate leaching represents a potential groundwater contamination. This study was carried out in an experiment area located in the city of Piracicaba/SP- Brazil, on a sandy-clayey loam soil. The objective was to evaluate internal drainage and nitrate leaching at the depth of 0.80 m in a crop succession, using 15N-labeled ammonium sulfate, in two split N applications. Evaluations were based on two corn crops, the first grown during the 2003/2004 cropping season, and the second in the 2004/2005 season, and on a black oat crop grown during the off-season. Treatments consisted of a single 120 kg N ha-1 rate, in the form of labeled (15N) ammonium sulfate, and two split N applications at 30-90 and 60-60 kg N ha-1. The fertilizer was applied in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flux density; 15N-ammonium sulfate; No-till; Soil solution. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500011 |
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| Blanco,Flávio Favaro; Folegatti,Marcos Vinícius; Gheyi,Hans Raj; Fernandes,Pedro Dantas. |
| Corn (Zea mays L.) is an important crop in Brazil and is cultivated in all regions, including the semi-arid area of Brazil, where the occurrence of irrigation water with high concentration of salts is common. Evaluating the growth and yield of the maize hybrid 'AG 6690' irrigated with water of different salinity levels was the objective of this experiment. Sowing was performed in pots with 12 seeds on May 23, 2003, and seedlings were thinned to two plants per pot. Irrigation was accomplished when the mean soil matric potential of each treatment was approximately -30 kPa using water with seven different electrical conductivities (ECi), varying from 0.3 to 4.5 dS m-1, which were obtained by addition of NaCl and CaCl2 in the equivalent proportion of 1:1. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Tolerance to salinity; Soil solution; Leaf area; Evapotranspiration. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600002 |
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| Blanco,Flávio Favaro; Folegatti,Marcos Vinícius; Gheyi,Hans Raj; Fernandes,Pedro Dantas. |
| Emergence and seedling growth may be severely affected by salinity, mainly for sensitive crops. The objective of the present study was to verify the tolerance of corn and soybean to the irrigation water salinity (ECi) during the emergence and initial development stages. Seeds of corn, hybrid 'AG-6690', and soybean, cv. 'Conquista', were sown in pots containing material from a sandy-loam soil and irrigated with water of increasing salinity levels, from 0.3 to 5.9 dS m-1, giving nine levels of ECi obtained by the addition of an equivalent proportion of sodium and calcium chloride, except for ECi = 0.3 dS m-1 (tap water). Emergence of corn was not affected by salinity but seedling development was reduced for ECi above 1.5 dS m-1. Emergence and growth of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Glycine max; Salinity tolerance; Soil solution. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500001 |
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| Pereira,Bruno Fernando Faria; Abreu,Cleide Aparecida de; Herpin,Uwe; Abreu,Mônica Ferreira de; Berton,Ronaldo Severiano. |
| A greenhouse study was conducted to evaluate the effects of ethylenediamine tetraacetic acid (EDTA) addition to soils on the lead (Pb) phytoextraction potential of jack beans (Canavalia ensiformis L.). In a pot experimentSoil samples (dystrophic Rhodic Hapludox) were treated with six Pb rates (0, 100, 200, 350, 1,200, and 2,400 mg kg-1 soil) applied as Pb(NO3)2 without and with EDTA application (0 and 0.5 g kg-1, respectively). Lead, Cl-, NO3-, NH4+, SO4(2-), H2PO4-, Zn2+, Cu2+, Fe3+, Al3+, Ca2+, Mg2+, K+ and DOC (dissolved organic carbon) concentrations obtained in a saturation soil extract (soil:water ratio of 1:0.3) were used for Pb speciation by means of the software Visual-Minteq 2.30. Soil Pb-availability was assessed with Diethylene triamine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ionic speciation; Phytoextraction; Soil pollution; Soil solution; Chelate. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300009 |
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| Registros recuperados: 18 | |
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