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Registros recuperados: 7
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Efficiency of water application of irrigation systems based on microsprinkling in banana plantations Scientia Agricola
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira; Miranda,Jarbas Honório de.
Further food production may be limited by the reduced availability of water resources. Since irrigated agriculture is the productive sector that presents a higher demand of water, this sector has been under intense pressure in order to ensure food production with improved efficiency of water use. This study aimed to use the Time Domain Reflectometry (TDR) technique to measure percolation losses and to determine water application efficiency of banana (Musa spp.) trees using microsprinkler irrigation systems. Three systems were studied: (i) one 32 L h-1 microsprinkler for four plants; (ii) one 60 L h-1 microsprinkler for four plants; and (iii) one 60 L h-1 microsprinkler for two plants. Systems that replace water to the soil with the lowest variation of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: TDR; Musa spp.; Root distribution; Irrigation management.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300001
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Estimating water application efficiency for drip irrigation emitter patterns on banana PAB
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira; Miranda,Jarbas Honorio de; Workman,Stephen Ray.
The objective of this work was to evaluate root and water distribution in irrigated banana (Musa sp.), in order to determine the water application efficiency for different drip irrigation emitter patterns. Three drip emitter patterns were studied: two 4-L h-1 emitters per plant (T1), four 4-L h-1 emitters per plant (T2), and five 4-L h-1 emitters per plant (T3). The emitters were placed in a lateral line. In the treatment T3, the emitters formed a continuous strip. The cultivated area used was planted with banana cultivar BRS Tropical, with a 3-m spacing between rows and a 2.5-m spacing between plants. Soil moisture and root length data were collected during the first production cycle at five radial distances and depths, in a 0.20x0.20 m vertical grid. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Musa spp.; Root distribution; Rootzone processes; TDR; Water use efficiency.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700013
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Estimation of water percolation by different methods using TDR Rev. Bras. Ciênc. Solo
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira.
Detailed knowledge on water percolation into the soil in irrigated areas is fundamental for solving problems of drainage, pollution and the recharge of underground aquifers. The aim of this study was to evaluate the percolation estimated by time-domain-reflectometry (TDR) in a drainage lysimeter. We used Darcy's law with K(θ) functions determined by field and laboratory methods and by the change in water storage in the soil profile at 16 points of moisture measurement at different time intervals. A sandy clay soil was saturated and covered with plastic sheet to prevent evaporation and an internal drainage trial in a drainage lysimeter was installed. The relationship between the observed and estimated percolation values was evaluated by linear regression...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Internal drainage; Unsaturated hydraulic conductivity; Instantaneous profile; Time domain reflectometry.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100007
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Soil water storage variability in a three-dimensional analysis in the root zone of irrigated melon Bragantia
Nascimento,Francisco Airdesson Lima do; Silva,Alisson Jadavi Pereira da; Campos,Allan Radax Freitas.
ABSTRACT A detailed knowledge of the soil water storage variability in the root zone can promote recommendations regarding the ideal positioning of sensors, as well as make the calculation of soil water balance more precise and accurate. This study aimed to assess soil water storage variability in the melon root zone and indicate – based on spatial variation of soil water storage – the regions of highest rootactivity of the melon crop in different development stages. Soil waterstorage was measured using time domain reflectometry (TDR) in 40 monitoring points. The data were daily collected in two periods: (i) immediately before irrigation and (ii) 30 min after irrigation. The soil water storage variation in the melon root zone occurs with greater intensity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil water balance; Drip irrigation; Irrigation management.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400587
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Water extraction and implications on soil moisture sensor placement in the root zone of banana Scientia Agricola
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira; Coelho Filho,Maurício Antônio; Souza,José Leonaldo de.
ABSTRACT: The knowledge on spatial and temporal variations of soil water storage in the root zone of crops is essential to guide the studies to determine soil water balance, verify the effective zone of water extraction in the soil and indicate the correct region for the management of water, fertilizers and pesticides. The objectives of this study were: (i) to indicate the zones of highest root activity for banana in different development stages; (ii) to determine, inside the zone of highest root activity, the adequate position for the installation of soil moisture sensors. A 5.0 m3 drainage lysimeter was installed in the center of an experimental area of 320 m2. Water extraction was quantified inside the lysimeter using a 72 TDR probe. The concept of time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil water storage; Irrigation management; Water balance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200095
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Water extraction variability in the banana root zone affects the reliability of water balance Scientia Agricola
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira; Coelho Filho,Maurício Antônio.
Spatial and temporal variability of soil water extraction from the root zone affect soil water balance determination. The number of sensors installed in the root zone in studies addressing water balance is still set arbitrarily. This study provided an investigation of the water extraction process by banana (Musa spp.) roots by (i) determining the variability of water extraction from the banana tree root zone, (ii) detecting differences in the estimation of evapotranspiration (ET) by the soil water balance method when the number of soil profiles monitored in the roots zone varies, (iii) and; determining the minimum number of Time Domain Reflectometry (TDR) probes needed to obtain ET precision and accuracy similar to that determined by a drainage lysimeter....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil moisture; Soil water balance; Water uptake.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100001
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Water percolation estimated with time domain reflectometry (TDR) in drainage lysimeters Rev. Bras. Ciênc. Solo
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira.
Due to the difficulty of estimating water percolation in unsaturated soils, the purpose of this study was to estimate water percolation based on time-domain reflectometry (TDR). In two drainage lysimeters with different soil textures TDR probes were installed, forming a water monitoring system consisting of different numbers of probes. The soils were saturated and covered with plastic to prevent evaporation. Tests of internal drainage were carried out using a TDR 100 unit with constant dielectric readings (every 15 min). To test the consistency of TDR-estimated percolation levels in comparison with the observed leachate levels in the drainage lysimeters, the combined null hypothesis was tested at 5 % probability. A higher number of probes in the water...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Drainage; Water flow in the soil; Soil moisture.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400009
Registros recuperados: 7
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