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| Registros recuperados: 15 | |
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| Divincula,Jesiele S.; Silva,Cinara B. da; Santos,Marcio A. L. dos; Santos,Daniella P. dos; Santos,Luan W. dos. |
| ABSTRACT Prickly pear cultivation has played an important role in the Brazilian livestock farming, being used as forage for animals in the Northeast region, especially during the drying season, because it is an excellent source of water. Thus, the objective of this study was to estimate the crop coefficient and water requirement of prickly pear in the Agreste region of Alagoas state, Brazil. Prickly pear crop evapotranspiration (ETc) was determined using five drainage lysimeters, made of polyethylene with dimensions of 0.35 x 0.40 m (side and depth). Four soil layers were separated and put into the lysimeters in the opposite sequence, in order to maintain it as close as possible to the initial soil structure. The reference evapotranspiration (ETo) was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Opuntia ficus-indica L.; Evapotranspiration; Lysimeters. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200925 |
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| Bariviera,Guilherme; Dallacort,Rivanildo; Freitas,Paulo S. L. de; Barbieri,Joao D.; Daniel,Diego F.. |
| ABSTRACT The objective of this study was to determine the dual crop coefficient of an early-cycle soybean cultivar for the city of Tangará da Serra, MT, Brazil, using high-precision lysimeters. The method used was the dual crop coefficient (dual Kc) of FAO Bulletin 56, constitued by soil evaporation coefficient (Ke), determined by microlysimeters, and by basal crop coefficient (Kcb), determined by weighing lysimeters. Reference evapotranspiration (ETo) was calculated using the Penman-Monteith equation. Soybean sowing and harvesting were performed in the 2015/16 season with spacing of 0.45 m between rows. The reference evapotranspiration (ETo) estimated for the cultivation period was 267.06 mm; the crop evapotranspiration was 323.61 mm throughout its cycle.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merril; Water balance; Lysimeters; Microlysimeters. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200075 |
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| ANDREA, M. C. da S.; VIEIRA, F. F.; DALLACORT, R.; BARBIERI, J. D.; FREITAS, P. S. L. de; TIEPPO, R. C.; ZOLIN, C. A.; KRAUSE, W.; DANIEL, D. F.. |
| With the objective of determining maize?s specific water requirements in different soil cover conditions in a Cerrado region of Mato Grosso, Brazil, this study used the dual?s crop coefficient (Kc dual) approach, according to FAO methods. An experiment was carried out in 2016, with three treatments: without vegetation soil cover; soil cover of 4 t ha-1 and soil cover of 8 t ha-1 dry matter of brachiaria grass. The used methodology accounts for crop?s transpiration component (through its basal coefficient, Kcb) and soil evaporation component (through its coefficient, Ke), which were determined for initial, intermediate and final phases of crop development. Experiments were carried in lysimeters to determine crop?s evapotranspiration, and in microlysimeters... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Cerrado; Milho; Zea Mays; Crop coefficient; Soil water; Evaporation; Lysimeters; Cerrado soils. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110476 |
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| LENA, B.P.; FLUMIGNAN, D.L.; FARIA, R.T.. |
| O objetivo deste trabalho foi determinar a evapotranspiração (ET) de cafeeiros adultos, irrigados por aspersão e gotejamento, e não irrigados, bem como os coeficientes de cultivo (Kc) de cafeeiros sob os dois regimes hídricos. O experimento foi realizado em Londrina, PR, com cafeeiros da cultivar Iapar 59, com cinco e seis anos de idade, de setembro de 2006 a agosto de 2008. A evapotranspiração foi medida por cinco lisímetros de pesagem, dos quais dois irrigados por aspersão, um por gotejamento e os outros dois sem irrigação. A irrigação foi aplicada, em média, duas vezes por semana, para manter o solo com umidade próxima à de capacidade de campo. O coeficiente de cultivo foi determinado pela razão entre a ET das plantas dos tratamentos irrigados e a... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Coffea arabica; Demanda hídrica; Lisímetros; Irrigação. water demand; Lysimeters; Irrigation.. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/908426 |
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| HUBNER, S.; GLATZLE, S.; GIESE, M.; ALMEIDA, R. G. de; ASCH, F.. |
| Agroforestry systems were established as a viable option for Brazilian farmers in recent decades. Shading is expected to affect the system?s microclimate and thus it is likely to alter water fluxes to the atmosphere via evapotranspiration. In this study we measured the evapotranspiration (ET) with micro-lysimeters in four different treatments as a proxy for different land use systems at EMBRAPA Beef Cattle, the Brazilian Agricultural Research Corporation, located in Campo Grande-MS, Brasil. The four treatments are: Integrated systems with rows of Eucalypt (Eucalyptus urograndis) trees (ICLF), integrated systems without Eucalypt trees (ICL), continuous pasture (CP) and native Cerrado (Savannah) vegetation. In the ICLF and ICL plots Bracchiaria brizantha was... |
| Tipo: Resumo em anais de congresso (ALICE) |
Palavras-chave: Brazilian savannah; Evapotranspiration; Agroforestry; Microclimate; Lysimeters; Bracchiaria brizantha; Eucalyptus. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1080519 |
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| Lira,Raquele M. de; Silva,Ênio F. de F. e; Simões Neto,Djalma E.; Santos Júnior,José A.; Lima,Breno L. de C.; Silva,Jucicléia S. da. |
| ABSTRACT The objective was to evaluate the growth and yield of sugarcane irrigated with brackish water and leaching fractions. A completely randomized experimental design was used, in a 5 x 2 factorial scheme, with four replicates. The treatments consisted of five irrigation water salinity levels (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (0 and 0.17), corresponding to 100 and 120% of the crop evapotranspiration. The irrigation management was performed daily. Irrigation water salinity levels were obtained by adding NaCl and CaCl2 to the public-supply water, in order to obtain a molar ratio between Na:Ca of 1:1. The following measurements were taken: height and stem diameter; number of tillers; number of leaves and leaf area with monthly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Salt management; Irrigation; Lysimeters. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300170 |
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| OLIVEIRA, M.W. de; TRIVELIN, P.C.O.; BOARETTO, A.E.; MURAOKA, T.; MORTATTI, J.. |
| A lysimeter experiment was carried out with sugarcane aiming to evaluate the leaching of nitrogen derived from either urea (15N) or the soil/sugarcane crop residues. The leaching of K+, Ca2+, and Mg2+ was also evaluated. The experiment was a factorial 2x4. The influencing factors were: firstly, the differential addition of two kinds of sugarcane remains to the soil, simulating conditions of cane- plantation renewal after the cane crop harvest, with and without previous straw removal by burning; secondly, four doses of N: 0, 30, 60, and 90 kg ha-1. During the experimental period the total volume of water received by the sugarcane-soil system was 2,015 mm, with 1,255 mm as precipitation and 760 mm as irrigation. The loss of N by leaching from the fertilizer... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Fertilizers; Mineral nutrients; Soil transport processes; Lysimeters. |
| Ano: 2002 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/107417 |
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| Oliveira,Mauro Wagner de; Trivelin,Paulo Cesar Ocheuze; Boaretto,Antônio Enedi; Muraoka,Taskashi; Mortatti,Jeferson. |
| A lysimeter experiment was carried out with sugarcane aiming to evaluate the leaching of nitrogen derived from either urea (15N) or the soil/sugarcane crop residues. The leaching of K+, Ca2+, and Mg2+ was also evaluated. The experiment was a factorial 2x4. The influencing factors were: firstly, the differential addition of two kinds of sugarcane remains to the soil, simulating conditions of cane- plantation renewal after the cane crop harvest, with and without previous straw removal by burning; secondly, four doses of N: 0, 30, 60, and 90 kg ha-1. During the experimental period the total volume of water received by the sugarcane-soil system was 2,015 mm, with 1,255 mm as precipitation and 760 mm as irrigation. The loss of N by leaching from the fertilizer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizers; Mineral nutrients; Soil transport processes; Lysimeters. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000600016 |
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| Flores Rodríguez, Patricia. |
| Bajo condiciones de invernadero y con base a la concentración de potasio (K+) en la caracterización química de la vinaza, se evaluó el efecto de diferentes dosis (0, 250 y 500 kg ha-1 de K+) sobre el suelo, en columnas de cloruro de polivinilo (pvc), empleando lisímetros de succión a dos profundidades (23 y 46 cm) y muestras al final de la columna (75 cm). En lixiviados se evaluó la concentración de K, el efecto sobre pH y conductividad eléctrica (CE), como cultivo indicador se uso alfalfa (Medicago sativa), efectuándose dos cortes, en un periodo de 120 días y una aplicación de vinaza al inicio del experimento y otra después del primer corte. En muestras de plantas las variables fueron materia seca, NT, B, Ca, Cu, Fe, K, Mg, Mn, Na, P, Zn y NO3 en suelo... |
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Palavras-chave: Medicago sativa; Lisímetros; Conductividad eléctrica; PH; Lysimeters; Electrical conductivity (EC); Maestría; Hidrociencias. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/116 |
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| Flores Rodríguez, Patricia. |
| Bajo condiciones de invernadero y con base a la concentración de potasio (K+) en la caracterización química de la vinaza, se evaluó el efecto de diferentes dosis (0, 250 y 500 kg ha-1 de K+) sobre el suelo, en columnas de cloruro de polivinilo (pvc), empleando lisímetros de succión a dos profundidades (23 y 46 cm) y muestras al final de la columna (75 cm). En lixiviados se evaluó la concentración de K, el efecto sobre pH y conductividad eléctrica (CE), como cultivo indicador se uso alfalfa (Medicago sativa), efectuándose dos cortes, en un periodo de 120 días y una aplicación de vinaza al inicio del experimento y otra después del primer corte. En muestras de plantas las variables fueron materia seca, NT, B, Ca, Cu, Fe, K, Mg, Mn, Na, P, Zn y NO3 en suelo... |
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Palavras-chave: Medicago sativa; Lisímetros; Conductividad eléctrica; PH; Lysimeters; Electrical conductivity (EC); Maestría; Hidrociencias. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/116 |
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| Vellame,Lucas M.; Coelho Filho,Maurício A.; Paz,Vital P. S.; Coelho,Eugênio F.. |
| The present study had as its main objective the evaluation of the heat balance method in young orange and mango plants under protected environment. The work was carried out at Embrapa Cassava and Tropical Fruits, Cruz das Almas, BA. Later on, estimates of sap flow were conducted for two mango plants cultivated in pots of 15 and 50 L installed on weighting platforms of 45 and 140 kg; sap flow was determined in three orange plants, two of which were also installed on weighing platforms. The values of sap flow were compared to the transpiration measured by lysimeters at integrated intervals of 1, 2, 4 and 24 h. The heat balance method showed good precision for estimating daily transpiration (R² = 0.95 and R² = 0.90), accompaning the availability of energy in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sap flow; Lysimeters; Citrus; Water stress. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000600005 |
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| Flumignan,Danilton L.; Faria,Rogério T. de; Lena,Bruno P.. |
| Quantifying soil evaporation is required on studies of soil water balance and applications aiming to improve water use efficiency by crops. The performance of a microlysimeter (ML) to measure soil evaporation under irrigation and non-irrigation was evaluated. The MLs were constructed using PVC tubes, with dimensions of 100 mm inner diameter, 150 mm depth and 2.5 mm wall thickness. Four MLs were uniformly distributed on the soil surface of two weighing lysimeters conducted under bare soil, previously installed at Iapar, in Londrina, PR, Brazil. The lysimeters had 1.4 m width, 1.9 m length and 1.3 m depth and were conducted with and without irrigation. Evaporation measurements by MLs (E ML) were compared with measurements by lysimeters (E L) during four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water management; Water balance; Lysimeters; Soil water. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100009 |
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| Registros recuperados: 15 | |
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